| Subject | Date Asked |
|
| Gas valve wont open | 11/18/2009 |
Q: I have a Trane XE 70 that won't heat. The gas supply is good, and the electronic ignition is coming ...
A: Check at the plug that goes into the gas valve with wires attached to it to see if you have 24 volts ...
|
| Heat Pump Pressures | 11/15/2009 |
Q: How can you determine if the compressor valve is bad or it's the reversing valve that is not ...
A: Run the system and disable the condenser fan motor while the system is running(the blower motor in ...
|
| humidistat setting | 11/11/2009 |
Q: My home always feels damp and warm. Have not had a humidistat for long time and in our new place it ...
A: The humidifier is not normally used at the same time as the A/C. The A/C is taking humidity out of ...
|
| Split AC unit with Freon leak | 11/10/2009 |
Q: I have a split HVAC unit. It is a Goodman 4-ton, 12-seer unit. I recently had the dye test done to ...
A: That seems a little early in the systems life to develop a leak. I would ask exactly where the leak ...
|
| Wiring of a Condensate Pump to my System | 11/6/2009 |
Q: I have a question regarding the wiring of a safety switch of a condensate pump to my residential ...
A: If the pump must work both summer and winter you would have to break the "R" wire with the safety ...
|
| Heat will not operate in auto fan mode | 11/5/2009 |
Q: I have central air with "strip heat" in my home. I replaced my old thermostat with a new ...
A: There is normally either a switch(physical) inside the thermostat or a setup option(programming) to ...
|
| Replacing T-Stat | 11/3/2009 |
Q: I have a White-Rodgers 2 stage heat pump/AC thermostat (#0745T) (cannot set temperature to be ...
A: Yes you would need a heat pump capable thermostat. With only 4 wires to the t-stat you are not ...
|
| heater | 11/2/2009 |
Q: Norval Trimborn, I have a Trane XR 80 forced air furnace about 7 years old. The problem with it ...
A: An open high limit can be from a previous cycle of the furnace. This can be due to overheating from ...
|
| damper assembly installation | 10/31/2009 |
Q: I've been told by an HAC guy that my upstairs zone damper assembly needs to be replaced. The ...
A: Although the cost may seem high compared to the "internet" price of the part you must realize that ...
|
| mold on coils | 10/29/2009 |
Q: I just had my furnace cleaned. My house is only four years old and the service man said and showed ...
A: Yes, the moist environment by the A coil can promote the growth of mold and bacteria. The use of UV ...
|
| gas furnace | 10/29/2009 |
Q: My furnace works very well when it comes on. I have to push the reset button on the furnace sometime ...
A: It depends on which reset button you are pushing(vent safety or rollout switch ). In either case you ...
|
| Residential Outside condenser. | 10/28/2009 |
Q: Our 4 ton consendser went out. We had a service tech come out and he diagnosed that the compressor ...
A: The 4 yr. old coil should not need to be replaced. The oil and refrigerant in the system will have ...
|
| payne furnace | 10/24/2009 |
Q: my furnace is displaying a code 33 signal. this model does not have a flame rollover reset. i am ...
A: Carrier 33 fault code is for a limit fault(high limit, rollout etc.). The device with the 2 red ...
|
| Furnace Exhaust | 10/22/2009 |
Q: Situation:I live in Canada, Southwestern Ontario,. I have a Armstrong HE furnace about 3 years old. ...
A: Installation guides normally dictate that the vent termination must be at least 12" above the snow ...
|
| Heating unit not heating | 10/20/2009 |
Q: I have a ducane unit that is about 4 years old and have had a few problems with it not heating at ...
A: It sounds as if you might have a heat pump from your description. What were your previous problems ...
|
| old jenitrol furnace blower | 10/19/2009 |
Q: My heating works and the blower comes on, but the blower will not shut down when furnace turns off ...
A: On older furnaces the blower was turned on by a helical bimetal fan/limit switch in the heat mode. ...
|
| Flame Sensor | 10/19/2009 |
Q: I have a Snyder General furnace, Model GUI100A016IN, Serial #R910500537. This thing chews through ...
A: It isn't normal for a flame sensor to need to be replaced more than once a year or even yearly. They ...
|
| 12 year old furnace broke - fix or replace? | 10/17/2009 |
Q: our 12 year old ICP/Keepright gas high efficiency furnace broke. The gas valve is defective and the ...
A: Although parts can last longer than 10-12 yrs. there is also a good chance that you can have 1 or ...
|
| 12 year old furnace broke - fix or replace? | 10/17/2009 |
Q: our 12 year old ICP/Keepright gas high efficiency furnace broke. The gas valve is defective and the ...
A: You need to know why the 12 yr. old heat exchanger failed. Manufacturing defect (some keepright ...
|
| Upgrade from 92-95% and adding variable valve/speed-Worth it? | 10/16/2009 |
Q: I currently have TWO 80% 20 year old Tempstar 150K BTU furnaces, one for each floor in my 4600 sq ft ...
A: It's a little tough to estimate the portion of your gas bill that is due to the furnaces as they are ...
|
| pilot light | 10/16/2009 |
Q: I'm trying to light my pilot for the first time this year. My nephew usually does this for me. It ...
A: Yes , you need to hold down the red button on the gas valve with the gas valve selector/dial in the ...
|
| Trane A/C | 9/19/2009 |
Q: I am the president of an association that has a large trane a/c system less than 10 years old. We ...
A: Your rooftop package unit is probably going off on the high pressure safety(and holding relay which ...
|
| 3 part question | 9/18/2009 |
Q: Can a clogged freon line cause the inside unit to leak? If a tech has to add freon when the unit is ...
A: A system that runs with the freon low will damage the compressor. There is a good chance that the ...
|
| 4-ton A/c condenser replacement | 9/17/2009 |
Q: Trimborn: We need to replace our 4-ton residential Lennox A/C condenser. We will be using a ...
A: I am partial to both Trane and Carrier as brands. You have a wide range of options with either ...
|
| Air Conditioning & Thermostat | 9/13/2009 |
Q: My a/c unit does not shut off when the thermostat does. We replaced the square 0 2 pole 60 Amp 240 ...
A: It sounds as if you have a heat pump from the number of wires that you have to the thermostat. ...
|
| residential hvac | 9/12/2009 |
Q: I just replaced the thermostat for my residential hvac system (gas heat, std hvac). I didn't turn ...
A: You need to check and see if the condensing unit contactor is pulled in with or without 24 volts to ...
|
| New AC unit not cooling enough | 9/10/2009 |
Q: I live near Tampa Fl. We puchased a new 3 ton central ac unit for our 1585 sq ft house. When it's ...
A: A 3 ton system is a 3 ton system. If operating properly the new unit should cool as well as the old ...
|
| water overflow from evaporator | 9/10/2009 |
Q: We are having a problem with water over flowing from our carrier a/c unit. We have checked the pipe ...
A: When the drain line was plugged up, the water would have filled the evaporator condensate pan and ...
|
| Plenum question | 9/9/2009 |
Q: Greetings from MN, I recently had a new outside AC unit replaced as well as the coil inside my ...
A: Yes, the ugly putty is the norm for sealing the lines as they go through the plenum. It can be done ...
|
| Rheem not blowing cool air | 9/7/2009 |
Q: My Rheem a/c is approximately 4 1/2 years old. It suddenly stopped blowing cool air and I don't ...
A: The handle in the service disconnect (that says on/off) is a pullout to interrupt power(240 volts) ...
|
| Replace A/C evaporator coil or get new unit | 9/5/2009 |
Q: I have a 15 yr townhouse in CA and the original A/C unit in the attic has apparently been leaking ...
A: At 15 yrs. your system would be considered well past middle age. R22 coils are still available until ...
|
| no power - not breaker | 9/5/2009 |
Q: I have no power to either the inside or outside units when I switch the thermostat. I hear the ...
A: Did you check for power with a volt meter? If so you will need to check from the unit(s) back toward ...
|
| A/c fan inside will not come on | 9/5/2009 |
Q: I have an old whirlpool/Honeywell patched together HVAC unit in closet. bout 15-20 yrs. No computer ...
A: You might be trying to use a relay with a 240 volt coil when you should have a relay with a 24 volt ...
|
| Nordyne blower for AC unit | 9/4/2009 |
Q: and we went up into the attic where the heater blower is. It's a Nordyne model#FG6RA 072C-12A. The ...
A: Is the fan motor in the attic unit running? If it is and the system is iced up it is usually due to ...
|
| Freon Leak Detection cost | 8/30/2009 |
Q: I had regular maintenance scheduled and was told that my freon was low(our unit uses R22 freon). I ...
A: Did you at least get a copy of the maintenance agreement that you signed up for? You should be able ...
|
| freezer compressor | 8/29/2009 |
Q: Norval, I realize this question may be off the beaten track but thought you might know the answer ...
A: I haven't done any refrigeration in more than 30 yrs.. A lot depends on what the compressor failure ...
|
| purchasing new furnice | 8/29/2009 |
Q: Our home is bi-level. 2,400 sq. ft. We are going to be purchasing a new furnice. I say we replace ...
A: For information on which furnaces and air conditioners qualify for a tax credit go ...
|
| AC fan motor works intermittently | 8/28/2009 |
Q: I have a Carrier AC system. The compressor works fine, but the AC fan is working intermittently. ...
A: I am assuming that you are talking about the outdoor fan motor. It could be the motor itself or the ...
|
| Heat Pump Layout | 8/27/2009 |
Q: Norv, Probably dont' get questions like this very often. My a/c exterior condensor fan went out a ...
A: In straight AC operation the outside coil rejects heat and the inside coil absorbs heat. In a heat ...
|
| Trane 1000xb not cooling | 8/27/2009 |
Q: I just bought a house that was built in 2000 we have a trane AC unit out back. My outdoor unit ...
A: It sounds like you have a problem with the condenser fan motor. It may be either the motor itself or ...
|
| Basement hating question | 8/27/2009 |
Q: I have a 6 year old 2,400 sq ft ranch with a basement with 1,400 sq ft finished. I have ceiling ...
A: Do you leave the stairway to the basement open or is there no door to the basement stairway? If ...
|
| evaporation coil | 8/25/2009 |
Q: Our A/C unit is only 4 yrs old and we had to call a service company today to have it checked because ...
A: $1157.00 labor to replace an evaporator coil that is under warranty is WAY out of line! You might be ...
|
| copper piping leak? | 8/24/2009 |
Q: My house was built in 2003 and it had a Carrier (4 ton, 10 seer I believe). The outside unit was ...
A: It is not normal to have to replace a six year old system(it should have a much longer lifespan). ...
|
| Bad compressor in o/s condensor unit of heat pump | 8/23/2009 |
Q: I'm in east central PA. I've had to repl compressors 3 times in the 22 yrs I've had this heat pump. ...
A: It sounds as if you may have a shorted/grounded compressor. Bad compressor doesn't mean ...
|
| replacement HVAC system | 8/23/2009 |
Q: We are replacing our 15 year old split A/C and gas furnace as the E coil is leaking Freon and cannot ...
A: Although the information that you have given is fairly thorough it is still difficult to tell ...
|
| Capacitor Blown | 8/22/2009 |
Q: My a/c recently stopped working, after some investigation i discovered the outside unit fan doesn't ...
A: When you say that the capacitor was blown, do you mean that the outside casing of the capacitor was ...
|
| 410A Pressure Temerature Chart Conversions | 8/22/2009 |
Q: I have a technical question about 410A and pressure temperature charts and i really need some help. ...
A: The old ambient plus 30 degrees only applied to old low SEER systems and then was only an ...
|
| Freon Leak Detection cost | 8/20/2009 |
Q: I had regular maintenance scheduled and was told that my freon was low(our unit uses R22 freon). I ...
A: Did the service technician ask you if you wanted to have the system leak checked before he put the ...
|
| new burner or boiler | 8/20/2009 |
Q: Our Wisconsin church has a 40 yr old non-condensing hot water boiler heating system. The boiler ...
A: Condensing/noncondensing refers to whether or not enough heat is removed from the products of ...
|
| new burner or boiler | 8/19/2009 |
Q: Our Wisconsin church has a 40 yr old non-condensing hot water boiler heating system. The boiler ...
A: You don't mention much about the building/piping layout and usage. Church only, church and offices ...
|
| residential high-efficiency fans | 8/18/2009 |
Q: What is the cost difference between a high efficiency fan and a standard fan for residential HVAC ...
A: A continuously variable speed DC motor is more expensive initially than a standard blower motor, but ...
|
| Amana furnace problem | 8/17/2009 |
Q: We have an Amana furnace that is about 7 yrs old and isn’t working. We had our vents cleaned last ...
A: Most newer furnaces have an automobile style 3 or 5 amp low voltage fuse on the circuit board in the ...
|
| aircondotion/heating | 8/17/2009 |
Q: I have a twop storied houise served by one centtral unit. the problem is that the 2nd floor is so ...
A: Putting the fan in the "on" position instead of the "auto" at the thermostat may help some. If you ...
|
| heater ignitor | 8/17/2009 |
Q: I have a question regarding my heater, how I could change the furnace ignitor? by the way I am a ...
A: Is it a hot surface ignitor? There are 2 types. Silicon carbide ignitors have a ...
|
| home ac | 8/16/2009 |
Q: my home ac unit seems to run alot and have a hard time cooling the house down. i have cleaned my ...
A: Do you have an upflow furnace in the basement, a downflow in a closet/laundry room or a horizontal ...
|
| central a/c | 8/15/2009 |
Q: Trimborn. The air coming out of the vents is very low so I called a tech. During the inspection he ...
A: An 8 yr. old system should still have many years of life left in it. If this is the first time that ...
|
| NEW FAN MOTOR | 8/14/2009 |
Q: My HVAC units fan motor had to be replaced. I pulled the old motor, while taking photos of the ...
A: It sounds like you you don't have the correct replacement motor. The old motor sounds like a single ...
|
| central a/c | 8/14/2009 |
Q: Trimborn. The air coming out of the vents is very low so I called a tech. During the inspection he ...
A: How old is your system? That can make a lot of difference. Some leaks are repairable and some aren't ...
|
| New Blower Motor Barely Turns | 8/14/2009 |
Q: I have a 10-12 year old Tempstar PGF018K040A package gas/electric unit. The blower stopped working ...
A: Check the voltage supplied to the motor when the motor is running. It should match the voltage on ...
|
| Central Air | 8/13/2009 |
Q: We are currently experiencing no air flow in our home. The outside fan is moving and there is no ice ...
A: If the filter has gotten plugged up in the past the air can't go through it, so it goes around ...
|
| high velocity system | 8/12/2009 |
Q: I have a 1 year old 3.5 ton system that isnt cooling my house consistently. I have the tstat set at ...
A: Was it just for a clean and check the last time the tech was out? 74 degrees doesn't sound like an ...
|
| extended warranty | 8/11/2009 |
Q: I am going to have a Trane xr15 system installed in my 1752 sq ft house in Fl. Does it pay to get ...
A: If you are referring to the extended warranty through Trane, I would consider it a good value for ...
|
| blower fan | 8/8/2009 |
Q: My AC blower fan starts then stops, I've replaced the run capacitor, and sometime it works for a few ...
A: If the blower motor stops while you still have full voltage supplied to it, the problem would seem ...
|
| dog chewed wires on central air unti | 8/7/2009 |
Q: Ok, I came home from work to find my house hot! The furnace unit in the house was running but not ...
A: If you reattached the wires outside while the AC was still supposed to be running you may have ...
|
| cleaning condenser coils | 8/7/2009 |
Q: is there a best practice for cleaning a/c condenser coils on comeercial RTU's ANSWER: Some ...
A: The amp. draw on a propeller style blade fan motor will increase if it is starved for air, so if you ...
|
| cleaning condenser coils | 8/6/2009 |
Q: is there a best practice for cleaning a/c condenser coils on comeercial RTU's
A: Some commercial rtu's have split condenser coils and the top of the units must be taken off in order ...
|
| TOO HOT IN MY HOUSE. | 8/6/2009 |
Q: HOW DO YOU KNOW IF MY A/C UNIT IS FULLY CHARGED? MY UNIT RUNS CONSTANTLY AND HOUSE WILL GET UP TO ...
A: The air coming out of the supply registers is normally 18-20 degrees cooler than the air coming into ...
|
| Trane XL1200 | 8/4/2009 |
Q: This is a brief history of the questions asked previously. I have a TRANE XL 1200 Super ...
A: Difficult to say. A grounded compressor should trip the breaker right away, yet you said that the ...
|
| New compressor and still not cooling | 8/4/2009 |
Q: My outside unit stopped working, it is a Rheem from 2002 unit. The repairman changed the compressor. ...
A: Was the compressor failure a burnout or a mechanical failure? Most early compressor failures are due ...
|
| HVAC coil | 8/4/2009 |
Q: I live in Florida. The house I bought was completed in 06-2000, with an installed Trane TWE042 ...
A: Most(but not all) early compressor failures are due to improper installation procedures or ...
|
| AC CONDENSATE | 8/3/2009 |
Q: I recently noticed water dripping from the "REFLECTIX" insulation that covers the AC coil and duct ...
A: A 5 year old drain pan should not be cracked, but it is possible. If the evaporator coil has become ...
|
| Indoor Humidity Issue | 8/3/2009 |
Q: First off I live in Central Florida. It is very hot and humid right now, and also raining heavy ...
A: Stumping me too unless the humidity is much higher than before or you have developed a way for more ...
|
| Indoor Humidity Issue | 8/2/2009 |
Q: First off I live in Central Florida. It is very hot and humid right now, and also raining heavy ...
A: I am assuming that you have made sure that the cond. coil, evap. coil and blower wheel were all ...
|
| Coli Cleaning | 8/2/2009 |
Q: I just received an assessment of my 15-yr old Heil 5000 unit from an Admiral "freon-charging ...
A: The price for cleaning the coil seems excessive unless the only way to clean the coil is to pump ...
|
| Size of plenum on residential a/c unit | 8/2/2009 |
Q: I recently hired a company to conduct a yearly inspection/cleaning on my residential central air ...
A: Has the system been working fine for the last 4 yrs. until recently? If so the problem would more ...
|
| Air Cleaner | 8/1/2009 |
Q: Okay, so I am really confused. What I thought would be a simple purchase has completely complexed ...
A: Electrostatic filters tend to be very restrictive to airflow(not good). Media filters tend to be ...
|
| Duct Work but No Compressor | 8/1/2009 |
Q: My husband and I purchased a house 12 years ago. The house was built in 1985. It appears to have ...
A: If your ductwork has been designed for heating only it will probably be inadequate for a cooling ...
|
| Heat Pump not working in AC mode | 7/31/2009 |
Q: I live in CT and have a heat pump system that is approx 15 years old. When the system runs in the ...
A: In cooling mode the large copper pipe between the outdoor and indoor unit should be cold. In heating ...
|
| problem with air & ins. coverage | 7/29/2009 |
Q: Just moved in to a new house and purchased American Home Shield home warranty (AHS)in escrow. After ...
A: Yes you can replace the furnace without replacing the condensing unit or coil. Your coverage under ...
|
| Kickstart / Dual Capacitor (45/5) | 7/29/2009 |
Q: I just had an AC repair (Amana 14 seer)4 ton or 5 ton unit. The tech came & installed a 45/5 Dual ...
A: Mark ups are high in this business. Technicians, office personnel, physical plant, vehicles and ...
|
| Connecting wiring for electronic air filter | 7/28/2009 |
Q: I have a Dynamic electronic air filter. I say's to connect the two wires to R and C. I understand R ...
A: The 4 wire run from the t-stat connects to R,W1,G and Y. The 2 wire run from the outside AC ...
|
| HVAC Theory | 7/28/2009 |
Q: I recently had an Amana 3 ton ASX16 16 SEER HVAC system with gas heat installed in my house in ...
A: It sounds as if you have a variable speed DC motor for the blower. The correct setting for a 3 ton ...
|
| HVAC Theory | 7/27/2009 |
Q: I recently had an Amana 3 ton ASX16 16 SEER HVAC system with gas heat installed in my house in ...
A: Older systems with a fixed metering device feeding the evaporator coil did not throttle down the ...
|
| compressor delay | 7/27/2009 |
Q: NOT ALL THE TIME BUT ONCE IN AWHILE MY O/S UNIT STARTS WITH THE FAN ONLY THEN AFTER ABOUT A MINUTE ...
A: Both the compressor and the condenser fan motor are powered through the contactor. They should both ...
|
| air conditioning argument | 7/26/2009 |
Q: "My father (88) and I (62) have a running disagreement about how to run the air conditioner in our ...
A: Economically it is better to open the windows if there is enough circulation in the house when it is ...
|
| compressor delay | 7/26/2009 |
Q: NOT ALL THE TIME BUT ONCE IN AWHILE MY O/S UNIT STARTS WITH THE FAN ONLY THEN AFTER ABOUT A MINUTE ...
A: There should be no delay for the compressor starting. If it is an older unit you may benefit from a ...
|
| Trane XB 1000 Bad Compressor | 7/23/2009 |
Q: I was having a problem with my ac unit not cooling down my house. As the temperature rose ...
A: 100 PSI on the suction side is a high reading and 160PSI on the high side is a low reading. A 100 ...
|
| replacing freon in a 5 ton compressor | 7/23/2009 |
Q: THe repair man who is installing new compressor in my 3 year old Carrier unit tells me the freon ...
A: The freon in the system must be removed in order to replace the compressor. What was the problem ...
|
| removimg a gas furnace | 7/23/2009 |
Q: I need to remove a furnace and cap off a gas line in order to have a heat pump/air conditioning unit ...
A: It sounds like your taking all the precautions that you should. Once the pressure is off the gas ...
|
| Kenmore gas water heater Power Miser 9 | 7/22/2009 |
Q: Main burner ignites and burns maybe 5 minutes. when it shuts down the pilot goes out with it. I ...
A: Water heaters aren't my specialty, but years ago when HVAC techs did service water heaters I ran ...
|
| AHU Variable Speed | 7/20/2009 |
Q: I recently had a new Goodman 4 ton system installed and the AHU has a variable speed fan. The ...
A: On many variable speed units the default blower speed for the fan ON setting at the t-stat is 25-50% ...
|
| HVAC Problem | 7/19/2009 |
Q: I have a rheem HVAC, Out of a 100 start ups once it want'ts to start but i only hear a suction or ...
A: How old is your system? Adding a hard start kit to an older system(or even a new one that didn't ...
|
| airconditioning/heating | 7/19/2009 |
Q: My office is at the far end of the house and it is freezing in the summer and too warm in the ...
A: Normally there is a damper at the point that each supply takeoff comes off the main supply trunk. ...
|
| Carrier 38BRB - adding R-22 | 7/18/2009 |
Q: Do you know if the Carrier 38BRB can with back seated valves - even though I do see a schrader valve ...
A: I am not familiar with that specific model of Carrier. Most of the Carrier cond. units I have seen ...
|
| Condenser motor Noise | 7/18/2009 |
Q: AC makes horrible noise when running, pinpointed noise to condenser motor. Sprayed some lubricant on ...
A: If it hasn't been oiled regularly you may be past the point of oiling doing any good on a permanent ...
|
| MEASUREMENTS | 7/18/2009 |
Q: first it seems like my t-stat when i change something is turns off and then maybe turn back on, like ...
A: With the t-stat set to OFF you should read 24 volts from the R terminal on the t-stat to all other ...
|
| Central air conditioning unit | 7/17/2009 |
Q: I live in southern Louisiana and need to replace my central air conditioning unit. My home has ...
A: That sounds a bit too large even for the Phoenix AZ area where I lived for 5 yrs.. What size is the ...
|
| Squirl Cage Blower | 7/16/2009 |
Q: I have a Ruud Furnace/ air conditioner system from 1879. I need to replace the blower and want to ...
A: Goodness that's an antique(1879). The blower wheel is replaced by diameter,width and rotation(the ...
|
| HVAC | 7/16/2009 |
Q: I am in the process of shopping for a new centrtal AC unit but I don't have a clue of which brand is ...
A: When you compare, it must be apples to apples. The SEER rating on the units you are comparing has to ...
|
| AC gurgling in drain line | 7/16/2009 |
Q: At my new home in TN. our AC man been back to service the upstairs Goodman ac/heatpump 6 times.The ...
A: Drains on the return side of the system must be trapped. After the trap, the drain line must be ...
|
| Honeywell RTH111/221 Thermostat | 7/15/2009 |
Q: I am installing a Honeywell RTH111/221 thermostat to control my gas heat, ac and fan. The previous ...
A: For normal color coding the red wire should go to RC/RH terminals on the t-stat which may be ...
|
| Residential AC | 7/13/2009 |
Q: AC quit blowing cold, slowly getting warmer over apx. 3 month period. Had friend come charge system, ...
A: The evap. coil can be pressurized to 50-100 psi and then checked the next day to if it has lost a ...
|
| A/C blowing from cold to hot with out changing.... | 7/13/2009 |
Q: My a/c will run fine for as long as 2-6months, then suddenly start acting as if it has a mind of ...
A: It would be difficult to tell without knowing more about the system. It seems as though you are not ...
|
| Residential AC | 7/12/2009 |
Q: AC quit blowing cold, slowly getting warmer over apx. 3 month period. Had friend come charge system, ...
A: Did the contractor say there was a leak in the evap. coil? If they replaced the evap. coil and had ...
|
| 5 ton condenser unit | 7/12/2009 |
Q: i just replaced a 5 ton condenser unit that was grounded out and now my new one went out.What could ...
A: How long after the condensing unit was replaced did this problem appear? It is possible that when ...
|
| humidity | 7/10/2009 |
Q: I had a 4ton straight cool which was replaced with a 3 ton heat pump - per load calculation. It ran ...
A: With a continuously variable speed motor you should have the option to decrease the air volume from ...
|
| air conditioner fan | 7/10/2009 |
Q: Goodman unit, 4 years old. Stopped cooling upstairs, however I feel air going into the intake. The ...
A: Does the compressor run in the outside unit or are both the compressor and the fan in the outside ...
|
| installing new furnace and air conditioning | 7/9/2009 |
Q: We are currently replacing a radiant ceiling heat system. Under options is listed "electronic air ...
A: Electronic air cleaners do a very good job(especially if someone in the house has allergies) but ...
|
| gas air conditioner | 7/9/2009 |
Q: In Indiana visiting family and my moms natural gas central cooling system won't kick on. The blower ...
A: If nothing runs outside you probably have a high or low voltage loss to the outdoor unit. You would ...
|
| baseboard heat | 7/9/2009 |
Q: We have a boiler with pipes that run to the baseboard heaters in all rooms. We are installing a ...
A: If you disconnect and cap off that run you will lose all the heat that radiator produced. If you ...
|
| AC blower turns on intermittently | 7/8/2009 |
Q: I have a 13 year old LENNOX AC unit and some kind of builders grade blower in the Attic. The Unit ...
A: You may have a problem with either the motor or capacitor the is causing it to shut down on internal ...
|
| altitude spec. on a/c unit | 7/7/2009 |
Q: Will an American Standard Triumph 16 packaged unit with a specification altitude rating of 0 - 2000 ...
A: The altitude specification is for the gas heating side of the unit. The gas manifold orifices should ...
|
| Freon cost $185.60 | 7/7/2009 |
Q: In addition to the big annual check up fee I was charged $185.oo for four pound of Freon. The ...
A: If you have a 3 yr. old system that needs 4 lbs. of freon, you have a leak. The technician should ...
|
| Control circuit issues | 7/6/2009 |
Q: I wired together yellow of the cooling circuit and blue(common) before turning off the indoor air ...
A: What was the original problem that had you tying the wires together? If the air handler has ...
|
| Air conditioner contracts | 7/5/2009 |
Q: Trying to help out my elderly father down in Fla. He is asking me about getting a service contract ...
A: Most companies these days do not write full coverage service contracts(covering cleanings and parts ...
|
| In attic A/C leak.... | 7/5/2009 |
Q: Timborn, i have a question for you....I noticed a leak in my ceiling right where our attic A/C unit ...
A: If its backing up into the drain pan and the drain pan is overflowing it is most likely a plugged ...
|
| ac drip at vent | 7/5/2009 |
Q: in an upstairs closet the vent is dripping. There is an attic access panel in that closet. I live ...
A: You should check the whole duct branch to the register outlet to see if moisture is accumulating in ...
|
| SEER rating | 7/4/2009 |
Q: I've been trying to find the SEER rating of my ComfortMaker air conditioner unit. The installer ...
A: How long the system runs depends on the outside temperature, whether everything is clean(filter, ...
|
| air handler drain line | 7/4/2009 |
Q: Does the drain fittings need to be glued together and can they just hook together dry? I know it ...
A: The drain fittings should be glued, but I usually leave the upstream side of one of the horizontal ...
|
| Turning off upstains AC | 7/3/2009 |
Q: We have a two story home and are now empty nesters. We live in the downstairs and the upstairs is ...
A: If you have high humidity in your area and you run only 1 of 2 units you may have trouble keeping ...
|
| Wrong run capacitor installed? | 7/2/2009 |
Q: Due to a lack a parts at the time, I replaced a residential dual run capacitor rated 60/3 370 volts ...
A: Yes you should replace the 5mfd with a 3 mfd. The voltage rating is ok since you can always replace ...
|
| Freon | 7/2/2009 |
Q: I'm a new homeowner and would normally ask my Dad these questions, but he passed away suddenly in ...
A: If it was very low on freon then there is a leak in the system. You need to have the system leak ...
|
| HVAC Handler in attic | 7/1/2009 |
Q: Sir I am in the process of buying a townhome in Freeport FL and had the home inspected. The ...
A: The air handler in the attic should have a secondary drain pan under the unit with a float or wet ...
|
| evap coil | 7/1/2009 |
Q: I have a Rheem Model RCBA-2459GG14 cased evap coil, 1994 installed. Indoor unit is vertical, ...
A: This should not be a capillary tube coil because of the install date. The distributor tubes are ...
|
| RHEEMS Compressor failed | 7/1/2009 |
Q: Lodi, California (it was 110F on Sunday so I am motivated) The house I purchased in 1990 has a ...
A: Yes you can just replace the compressor. Yes a new system will cost more than just replacing the ...
|
| airconditioner | 6/29/2009 |
Q: I live in Houston Texas the tempature is around 100 degrees outside if i have the ac set on 70 at ...
A: It depends on sizing practices in your area. If your area has high humidity during most of the ...
|
| a/c question | 6/29/2009 |
Q: i have no low voltage to yellow wire coming from the thermostat or if i test at thermosta only red ...
A: The majority of thermostats do not have a 24v common wire to them. What are you testing the R(red) ...
|
| Replacing outside unit of split system | 6/29/2009 |
Q: My system is almost 20 years old. The compressor of outside unit must be replaced. Should the ...
A: Yes the outside unit only can be replaced, but it doesn't make much sense as a 20 yr. old evaporator ...
|
| Need a new A/C & Heater | 6/28/2009 |
Q: It is time to get a new system. We have gas. There are various businesses out there who can give us ...
A: Most major manufacturers equipment are all comparable. In order to compare apples to apples, "good', ...
|
| 1/2 to 3/4 hp furnace blower motor | 6/27/2009 |
Q: and thankyou ahead of time for any helpful info. I currently have a Rheem Classic 90 Plus ...
A: The blower motor horsepower is sized by the manufacturer for the size of the blower wheel. Since ...
|
| Steam cleaning ac coils | 6/27/2009 |
Q: I have access to my ac coils (condenser as I have heard it referred to) I have heard of the ...
A: I am not sure which coils you are talking about. Condenser coils are the outside part of the system ...
|
| Central air conditioning units | 6/26/2009 |
Q: Norval, What is the best company (brand) to buy a central air conditioning unit from? How do you ...
A: Any of the major brands put out good solid equipment. Trane is one of the brands that I have always ...
|
| Bad A-Coil & Drip and and Should I Replace! | 6/26/2009 |
Q: I recently discovered water at the bottom of my furnace after running my central air. Had service ...
A: If you are just looking to get by until the condensing unit must be replaced then a replacement ...
|
| AC fan shuts off | 6/26/2009 |
Q: We have a Goodman CKL-30-1f air conditioner. We had a repairman come and he found the capacitor ...
A: If both the old and the new motor are the same voltage, horsepower, rpm and rotation it would seem ...
|
| Lennox HP22, cooling problem | 6/26/2009 |
Q: I have a Lennox HP 22 Heat pump. The unit runs fine and has no out of the ordinary noises coming ...
A: It is possible that the system is low on refrigerant. It is also possible that there is another ...
|
| AC Usage | 6/25/2009 |
Q: Greetings, I have a general, non-vendor specific question I was hoping you could help with. My ...
A: Running a central air system that is working properly and is clean and has a clean filter in it does ...
|
| Central a/c | 6/25/2009 |
Q: If I am trying to cool my 760 sq. ft. apt to 70 degrees, what should the temp of the air that blows ...
A: The supply air temperature should be 18-20 degrees colder than the return air at average relative ...
|
| HVAC working no, air in vents, house not cooling | 6/25/2009 |
Q: Trimborn, I have an HVAC unit and it seems to be working full speed, but no air is coming out of the ...
A: Check to see if the system is icing up. This starts at the evaporator coil inside and can work its ...
|
| New A/C Unit & Wiring Problem | 6/24/2009 |
Q: We have a 30 yr old central air system. The a/c has been limping along for the past few years, ...
A: Both the furnace and also the condensing unit should be dedicated electrical circuits( they should ...
|
| saftey switch on a little giant pump | 6/24/2009 |
Q: I am installing a little giant condensation pump on my Trane central air unit.I have 2 wires coming ...
A: You would actually put these 2 wires in series with the "Y" connection at the furnace/air handler ...
|
| central air conditioning | 6/24/2009 |
Q: I need to replace my central air conditioner and gas furnace, I am leaning toward the duel fuel ...
A: I have seen a great many heat pump systems in the 15- 25 yr old range. Is the normal life span of a ...
|
| hvac | 6/23/2009 |
Q: We installed a new frigidaire hvac unit in 2004. We have had nothing but trouble w/ the temperature ...
A: Not enough cooling, freezing up and water leaking sounds like the symptoms of a refrigerant leak. It ...
|
| Hard Start Kit for Residential A/C | 6/22/2009 |
Q: I have a small ductless mini split system (Heat Controller, Inc.) that conditions a room over a ...
A: If the run capacitor was ok but the compressor wouldn't start then the hard start kit kept you from ...
|
| A/C not cooling well. | 6/21/2009 |
Q: I have a two story home with separate units for each floor. I never have the downstairs(basement) ...
A: It could be a number of reasons. 68 degrees is a bit below the normal comfort range of 72-76 ...
|
| Line insulation | 6/21/2009 |
Q: I noticed that only the large line (1/2"-3/4") from the heat pump to the air handler is insulated ...
A: The smaller of the 2 lines is the liquid line and the liquid refrigerant in the line has been cooled ...
|
| Melted AC Drain Pan | 6/21/2009 |
Q: I have a goodman GMPN100-4. Turned on the AC for the first time and had water all over the floor in ...
A: There is a good chance that the drain pan was damaged when the blower motor failed if the furnace ...
|
| Honeywell Chromotherm 3 not working? | 6/20/2009 |
Q: I have a Honeywell Chronotherm 3. When I turned the AC on the first time this year, the fan would ...
A: It could be either. Check the battery contacts on the thermostat to make sure that they are not ...
|
| Attic fan versus whole house fan | 6/20/2009 |
Q: My husband and I moved into a 3 year old two story home. The AC works great on the first floor but ...
A: A temperature actuated attic exhaust fan will reduce the temperature difference between the attic ...
|
| reaching absolute optimal freon charge | 6/20/2009 |
Q: For years (I'm 55) I have wanted to know how to reach supercool or optimize using supercool method ...
A: I have to assume that your system has a fixed metering device rather than a txv. The most accurate ...
|
| seer | 6/20/2009 |
Q: Can a 12 seer inside coil be matched with a 13 seer condensing unit? We installed a new furnace and ...
A: Yes a 12 SEER indoor coil will work with a 13 SEER condensing unit. You will not achieve a 13 SEER ...
|
| AC drain line blowing cold air | 6/20/2009 |
Q: There is a pvc line exiting the AC unit that has a short piece of pvc sticking up that is blowing ...
A: The pvc line is the condensate drain line for the A/C. If the evaporator coil is on the supply side ...
|
| Central air & water | 6/19/2009 |
Q: I have a Trane XE1000 and the attic unit is dripping water onto the ceiling. It appears that there ...
A: The most likely cause is a plugged condensate drain line. If the insulation inside the unit is wet ...
|
| Frozen central AC | 6/19/2009 |
Q: My Central AC unit is frozen. We just had it serviced 2 weeks ago, the freon was fine and we also ...
A: A frozen unit is usually due to inadequate air flow(dirty filter,evap.coil, blower wheel or closed ...
|
| heat pump thermostat doesn't work | 6/19/2009 |
Q: I live in Gulfport, MS. In Feb, contractor replaced old GE heat pump with new XL16 Trane heat ...
A: If the system runs continuously but doesn't cool down the house it would seem that the problem is ...
|
| lennox ac unit model#10acb24-9p | 6/18/2009 |
Q: my ac wont turn on i have a honeywell electronic thermostat and when i switch to ac the ac symbol ...
A: The blinking AC normally means that the thermostat is not getting 24volts to power it. If this ...
|
| AC unit | 6/17/2009 |
Q: I have a question about the coil on an American Standard Heat/Air home system. I am not sure how ...
A: No problem with the length of the question. The more information you give me the better I can ...
|
| R-410 A/C system | 6/16/2009 |
Q: I want to know what should be done on a residental air conditioning unit using R-22 to change the ...
A: You will have to change both the outdoor unit and the indoor unit. It is also preferable to replace ...
|
| York Central Air Unit | 6/15/2009 |
Q: I have a York Central Air Unit, 3 zones and 2 programmable thermostats. When you first turn the ...
A: Without being able to see the system setup and directly troubleshoot the system while the problem is ...
|
| Central Air | 6/15/2009 |
Q: I bought a house with a pretty old A/C unit that hasn't worked yet. Today I opened it up and hit the ...
A: Is the burning smell inside or outside? It could be a motor, transformer, contactor or wiring etc.. ...
|
| Luxaire home central air problem. | 6/15/2009 |
Q: i just moved into a house in Michigan with a Luxaire central air conditioning system that looks ...
A: It sounds like you may have a system that is well past its prime with multiple problems. If there is ...
|
| Condensor fan replacement | 6/14/2009 |
Q: The fan on my daughters outside condensing unit is making a lot of noise and needs replacing. I am ...
A: As long as the fan motor is the same horsepower, voltage, rpm, direction of rotation and mount you ...
|
| Trane compressor not turning back on | 6/13/2009 |
Q: I have three trane 4 ton units in my house. When i have a jerk of power meaning it goes off then on ...
A: If you don't already have one a start relay and capacitor might help. You could also wire a small ...
|
| Goodman central A/C won't run | 6/11/2009 |
Q: Mr. Trimborn, My Goodman A/C services my 400sf condo which is just 2yrs old. I used it 2 weeks ago, ...
A: If you have a float switch in the secondary safety drain pan it should only be off(open) if there is ...
|
| variable speed air handler | 6/11/2009 |
Q: Live in houston, tx and have a goodman vs airhandler w/ emerg. heat paired w/ 3.5 ton condenser. I ...
A: I am not sure about the dip switch settings that are specific to your goodman unit. They should be ...
|
| Goodman central A/C won't run | 6/10/2009 |
Q: Mr. Trimborn, My Goodman A/C services my 400sf condo which is just 2yrs old. I used it 2 weeks ago, ...
A: If the A/H is in the attic you may have a safety float switch in the secondary drain pan under the ...
|
| Convert a 10 SEER to a 13 SEER | 6/10/2009 |
Q: We built our house and moved in Nov 2006. We thought we got a 13 SEER AC unit. This weekend the ...
A: If the evap. coil will accept either a piston or an expansion valve, then it can be converted. Not ...
|
| Problems with my York | 6/9/2009 |
Q: I have a 3 1/2 ton outdoor York unit, about 18 years old. It has worked flawlessly for these 18 ...
A: It is probably a bearing wear problem with the condenser fan motor and you may have to replace the ...
|
| blower moter | 6/6/2009 |
Q: bought a blower motor for unit 58gp075-ga and the old motor is 4 speed 9.8 amps and no capacitor, ...
A: I assume the new motor that you got is the same horsepower,voltage, rpm and direction of rotation. ...
|
| air conditioner capacitor | 6/5/2009 |
Q: i am looking to replace the dual capacitor in our central air conditioner at home, it has a ...
A: There are a few choices in finding out which capacitor you need. The first is to go to the ...
|
| Corroded coils | 6/5/2009 |
Q: An HVAC technician just left after inspecting my upstairs unit, Carrier 38YCC, which is a little ...
A: I assume you are talking about the outdoor(condenser) coil on a split system heat pump. At just over ...
|
| Lenox AC | 6/5/2009 |
Q: I have a residential Lennox High Efficiency AC unit about 12 years old (I think it is a 2 ton). ...
A: "Zerol Ice" is an additive that when added along with the oil already in the system help to decrease ...
|
| AC replacement/split system | 6/3/2009 |
Q: I want to replace a Lennox model 10ac48. Does it matter much if I replace the condenser with another ...
A: I assume you plan to replace the condensing unit only without replacing the evaporator coil. As long ...
|
| Freon vs. Puron | 6/3/2009 |
Q: I am in the process of getting a new air conditioner. Went on the web and learned there are still ...
A: While there are no inherent problems with R-410A as a refrigerant itself, it has some ...
|
| Air discharge Temp on cool cycle | 6/2/2009 |
Q: My cooling system seems to run constantly. I checked the air intake temp, 76 degrees, and the air ...
A: Delta T (difference in temperature between return air and supply air) is normally about 18-20 ...
|
| Heat Pump Not Working in Cooling Mode | 6/2/2009 |
Q: We have a dual heating/cooling system in our home. Heat pump services the upper level. (Trane model ...
A: The system should be repairable. While it is possible that the compressor failed due to a ...
|
| Replacing A/C unit | 6/2/2009 |
Q: I live in a suburb of Kansas City. The house is approx. 11 yrs old with a Lennox Elite A/C unit. I ...
A: If the leak can be found and repaired you may be able to get some more life out of the system. A lot ...
|
| ac air handler replacement | 6/1/2009 |
Q: About 4 years ago I had my outside condenser only replaced with a miller 1.5 ton unit at my St Pete ...
A: It is not unusual for a 25 yr. evap. coil to develop leaks at multiple return bends. I am not ...
|
| Residential air conditioner | 6/1/2009 |
Q: What causes thne large line coming out of the condenser to ice over? What needs to be done to fix ...
A: The flow in the large (suction) line is back towards the condensing unit. Icing up can be caused by ...
|
| New central air makes me sick and has weird odor? | 5/31/2009 |
Q: I live in a 50 year old home that had a new central air conditioning unit installed. We used to use ...
A: Cannot tell exactly what the problem is without being able to smell the odor. Possibilities would ...
|
| covering exterior vent pipes | 5/31/2009 |
Q: I used to sell HVAC equipment to contractors before becoming a realtor. I referred an experienced ...
A: I don't know of anything that is made to cover the vent pipes outside the house. Normally the vent ...
|
| heat pump | 5/29/2009 |
Q: I have an american standard heat pump. At 80 degrees F today I am running a suction of about 80 and ...
A: I would need more information to have an idea of what is going on with the system. What is the ...
|
| Rusted out drain pan | 5/29/2009 |
Q: I have just learned that the drain pan is rusted out in my 20 year old unit. What concerns should I ...
A: If an exact replacement for the original drain pan is available that would be an option. At 20 yrs. ...
|
| Lennox Heat Pump | 5/28/2009 |
Q: I bought a brand new house in January and I recently needed the AC function of my brand new Lennox ...
A: You should only need to switch the thermostat to the cool position to have the A/C run and cool. The ...
|
| upducts | 5/28/2009 |
Q: We no longer use swamp cooler thus no use for upducts in ceiling for swamp cooler and I notice alot ...
A: The only effective way of keeping the heat from the ductwork from entering the conditioned space ...
|
| "Attic" Smell | 5/11/2009 |
Q: I have a smell coming from the duct work that smells somewhat like the smell of my attic, but ...
A: Depending on the tightness of the house and the integrity of the return ductwork by the furnace it ...
|
| Central Air Conditioner Question | 5/11/2009 |
Q: I live in a home in AZ I bought brand new 3.5 years ago. First time I noticed that my AC (for ground ...
A: I lived in Scottsdale for 5 years, so I know what the weather is like. While it is entirely possible ...
|
| Home AC Unit | 5/11/2009 |
Q: I know I'm going to sound silly but I have a Carrier home AC unit. I know that there is a part of ...
A: You will probably need a service technician to get to the source of the problem. If the inside runs ...
|
| Compressor, coil, air handler | 5/10/2009 |
Q: I'm told that one of my compressors and coils will need to be replaced. Is it normal to replace ...
A: In a cooling only application, the evaporator coil normally comes with the air handler. If you are ...
|
| Trane heat pump | 5/10/2009 |
Q: I have a Trane split system heat pump about 18 years old. It's model# is TWD724B100A1. Is this a ...
A: Yes that is a 2 ton system. If you are planning on repairing rather than replacing the system you ...
|
| AC/heaters | 5/9/2009 |
Q: We have a very old (30yrs) Carrier AC/heater combo in Phoenix, AZ, and it currently works well. It ...
A: Some parts may be available as universal replacement parts and some strictly O.E.M. (Original ...
|
| Fuse blowing on furnace | 5/9/2009 |
Q: I have a York High efficiency Tubular Heat exchange series GY8S Furnace, the thermostat wasn't ...
A: Blowing the low voltage fuse on the circuit board intermittently can be a very difficult problem to ...
|
| Amana PTAC will not operate | 5/8/2009 |
Q: I have an Amana Model PTH153A35AA ptac (heat pump). the unit is 12 years old. For the last year, it ...
A: From the price you are telling me that a new unit costs, I am assuming that this is a through the ...
|
| Air conditioner | 5/6/2009 |
Q: I believe I may have emailed you earlier but now another problem. I'm the one with the Emerson air ...
A: If the compressor is running but the outside fan is not the system will develop excessive head ...
|
| Contactor points | 5/6/2009 |
Q: I have a Cariier unit that sits outside the house, when turning the AC, air comes out of the vents ...
A: Contactor points are not available as a separate part, you must purchase a replacement contactor. ...
|
| which a/c unit to purchase | 5/6/2009 |
Q: We have two Trane 2.5 ton heat pump, split systems, that are 22 y.o. They both need replacing. We ...
A: Any brand of system or unit that is rated at the same efficiency and has the same features should do ...
|
| heating and air conditioning units | 5/6/2009 |
Q: Building a new home 2000 square feet and want to know what size units (heating and air conditioner) ...
A: Old "rules of thumb" for sizing a/c units by square footage are different in different parts of the ...
|
| Cleaning coils on York air handler units | 5/5/2009 |
Q: How do I clean between coils that are sandwiched together?
A: It depends on how dirty and packed the space between the fins are on the coil. Normal yearly ...
|
| supply register on furnace plenum in basement | 5/5/2009 |
Q: I live in Western NY and have a ranch house with unfinished full size basement with forced air NG ...
A: The window question is outside my area of expertise, but it seems that if cold air is leaking into ...
|
| Condenser Fan isn't working | 5/4/2009 |
Q: . I live in Ohio ... the heat hasn't hit bad yet, but I noticed when we had the air on the other ...
A: It could be either the motor or the capacitor. A capacitor can be weak without being "bloated" or ...
|
| S.E.E.R. rating&freon loss | 5/4/2009 |
Q: I moved in two years ago,I have had to get freon every 6to8 weeks since.My home warranty says it ...
A: SEER rating is the BTU output divided by the watt-hours of energy input over a specific period of ...
|
| supply register on furnace plenum in basement | 5/3/2009 |
Q: I live in Western NY and have a ranch house with unfinished full size basement with forced air NG ...
A: Closing the register on the supply plenum won't affect the combustion air for the furnace in a full ...
|
| Capacitor | 5/2/2009 |
Q: "Outdoor Capacitor is a 35/5. Lowest allowed by MFR - 32/9. Now testing at 32/7." Replace for ...
A: Capacitors should be within plus or minus 10% of their rating to operate correctly. If they are ...
|
| heat return | 5/2/2009 |
Q: We live in a capecod with an attached garage. We are finishing off a large bonus room over our ...
A: The ideal placement for returns and supplies for air conditioning are for both to be high. The ...
|
| TRANE XE-80 heating problrm | 5/2/2009 |
Q: ..I live in CA. Problem with Trane XE-80 heating. ( A/C works fine ). When set to heat, flame comes ...
A: The normal reason for tripping the high limit is insufficient air flow. Most of the time if the unit ...
|
| 1980 model HVAC system versus enery efficiency HVAC system now | 5/1/2009 |
Q: energy saving of using new model HVAC compare to old model 1980 HVAC system. What are the benefit ...
A: In gas furnaces, the efficiency relates to the percentage of the heat produced that actually goes to ...
|
| Intertherm AC drip pan rusts, plugs, overflows | 4/30/2009 |
Q: My mother's modular home in Michigan has an Intertherm central forced-air combination gas furnace ...
A: Most newer units have changed to plastic condensate pans, but the older ones were steel. With the ...
|
| new HVAC unit | 4/30/2009 |
Q: I have been getting some estimates for a new HVAC unit. Ours is over 25 years old. I've been ...
A: The Gibson brand is made by Nordyne. I have not been impressed by either Gibson or Coleman. Try ...
|
| access valve | 4/29/2009 |
Q: on a reciprocating compressor that has a port above the sight glass for a access valve fitting, what ...
A: Yes you can add oil through the suction port. HVAC parts suppliers have pumps specially designed for ...
|
| American standard vs trane and amana | 4/28/2009 |
Q: I am getting a quote from different contractors to install a 3 ton a/c unit.. I have quote of 6000 ...
A: Trane and American Standard with the same features and efficiencies are basically the same unit. If ...
|
| Conversion to multi-zone possible? | 4/28/2009 |
Q: I have a 30-yo 2500 sq-ft home in Northern Virginia with forced air heat and AC. Single zone ...
A: I can't really answer the question as to cost because I have never priced out that type of job for a ...
|
| Outside Compressor issue | 4/27/2009 |
Q: I had a heating contractor fix my furnace this winter and I just tried using our A/C but the outside ...
A: The terminal marked Com24v is the same as C. There are normally 4 wires coming from the thermostat ...
|
| Goodman 13 Seer Heat Pump Problems | 4/27/2009 |
Q: Our power more than doubled 4 months ago so we had the people who installed come out and look at our ...
A: It sounds as if you have a leak in the system. While it's possible that there was a leak at the cap ...
|
| Rheem RQKA-A042JK With Option 541 | 4/27/2009 |
Q: My unit is freezing up. So I contacted a local ac tech. He came out and charged my system for me ...
A: 55-65 psi on an R22 system corresponds to just below or just above freezing(32 degrees). When run at ...
|
| HVAC unit blower | 4/27/2009 |
Q: You have previously answered this question .The fan on my air conditioner/heater system will not ...
A: Some questions are specific to individual units/brands and can't be taken as a general across the ...
|
| Running Central AC with cover on | 4/26/2009 |
Q: My super intelligent wife has been running the Central Ac unit of my house for 20 hours with the ...
A: It is possible that you have a dead compressor. Running the unit with the cover on will cause ...
|
| gas furnace fan rumbles | 4/26/2009 |
Q: I have a coleman presidential 7600b series gas furnace from the 70's in my 70's trailer house. ...
A: This problem can have a number of causes. The blower wheel can be out of balance or dirty. The ...
|
| breaker / to much voltage | 4/26/2009 |
Q: Good morning,The problem i'm having is with my central air ! when i go to turn the a/c on the ...
A: 260 to 300 volts seems high for supply voltage. Most electric service providers regulate the supply ...
|
| a/c causing damp wall | 4/26/2009 |
Q: my a/c split unit has a pipe to lead the waste/condensed water out of the house. this pipe(set in ...
A: Depending on where the unit is located it may be possible to use a condensate pump by the indoor ...
|
| air conditioning | 4/25/2009 |
Q: I have hot water heat in an older house. How can I install air conditioning? Thanks......Darlene
A: One of the easiest ways to install A/C in a house with hot water heat is to use a high velocity/low ...
|
| Payne Heat Pumps | 4/25/2009 |
Q: I need to replace a 23 year old 2 ton York heat pump on a rental unit. The best bid that I've ...
A: Builders models of HVAC equipment are generally the lowest cost bare-bones types of units. They tend ...
|
| What heat pump unit with gas pack is best | 4/25/2009 |
Q: my present heat pump is 18 years old. It has been serviced regularly and is still working fine, but ...
A: I am not familiar with the lowest winter temperatures that you see in that area. Do you have only a ...
|
| no air from ducts | 4/25/2009 |
Q: I have a Goodman heat pump/AC, and the air filter has been changed, and there is power supply to the ...
A: Some Goodmans use a time delay relay to delay both the starting and stopping of the blower motor. ...
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| outside york unit | 4/24/2009 |
Q: have 2 york's outside, one runs upstairs, little bigger one runs middle floor and basement, the one ...
A: If the compressor and fan run when you push in the "points" on the contactor it would indicate a ...
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| burned up motor in furnace and a/c | 4/24/2009 |
Q: I just found out that my a/c unit burned up a motor. How does that happen? What can a DIY do fix the ...
A: From what I understand, the blower motor in your furnace burned out while you were running the air ...
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| outside york unit | 4/24/2009 |
Q: have 2 york's outside, one runs upstairs, little bigger one runs middle floor and basement, the one ...
A: Since both the fan and the compressor will not run the problem should either be no line voltage ...
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| drip pan overflow | 4/23/2009 |
Q: where can I purchase a overflow switch that would shut off the ac and possible sound an alarm or ...
A: A number of types of safety switches are available for drain pans that will install in either the ...
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| rheem | 4/22/2009 |
Q: have a upflow rheem as a piggyback on heat pump with control board that goes into emergency heat no ...
A: It is very difficult to diagnose a problem without being on the spot and able to logically follow ...
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| copeland compressor | 4/22/2009 |
Q: steps on how to add oil to a compressor? what equipment is needed for the job? any tips? thanks.
A: Why do you need to add oil to a compressor? Most new and replacement compressors are shipped with ...
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| heating problem | 4/22/2009 |
Q: I have a comfortmaker furnace that comes on, the pilot lights but gas never flows. If i take the ...
A: If the furnace has an intermittent pilot that always lights off, but you do not always get the ...
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| time delay relay | 4/21/2009 |
Q: Looking for a time delay relay for a 36000 Btu Friedrick a/c. Have a generator in power system when ...
A: Time delay relays are usually available through an HVAC supplier(most will not sell to an ...
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| furnace not working after power outage | 4/21/2009 |
Q: I'm having a problem with my gas forced air furnace after just recovering from a 4 day power outage ...
A: Check the low voltage at the circuit board first. If you have 24v at the circuit board, the problem ...
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| furnace not working after power outage | 4/21/2009 |
Q: I'm having a problem with my gas forced air furnace after just recovering from a 4 day power outage ...
A: Without being there to troubleshoot it is difficult to diagnose. Do you have 24v between R and C on ...
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| Mitsubishi 3.5hp split system air conditioner | 4/20/2009 |
Q: My Mitsubishi 2 way split system air conditioner about 7 years old has stopped working. I recently ...
A: Very difficult to diagnose without actually being there to check the unit. How long was the unit ...
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| replace theromstat | 4/19/2009 |
Q: i live in socal., and i recently replaced an old mercury run 4 wire thermostat with an honeywell ...
A: Was the old thermostat working when you replaced it or did you replace it to try to solve a problem? ...
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| Smell Of Death | 4/18/2009 |
Q: There is an extremely foul odor coming from our vents.Even when the heat or a/c is shut off it is ...
A: I would think that a pest control company would have experience in removing dead or live pests from ...
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| Gibson GL1RA series | 4/17/2009 |
Q: My tenant reports that one morning the pre-programmed thermostat did not kick on the heat as usual. ...
A: Very difficult to say without being there to troubleshoot when the problem was happening. The first ...
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| ac handler | 4/17/2009 |
Q: Ineed help and this is the problem: "Compressor will kick on but the air handler will not" I ...
A: It could be a number of things. Some Goodmans of that approximate age had time delay relays to turn ...
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| heat calculator pump | 4/17/2009 |
Q: What does it mean when the light in on and it says to call for heat calculator pump?
A: You haven't given me very much information to work on. What type, make and model of equipment are ...
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| Heat Exchange Unit | 4/16/2009 |
Q: I have an older forced air furnace (Carrier DNP 24cc-9). I was told recently that the heat ...
A: Most heat exchangers can be replaced if they are available, but manufacturers generally only have ...
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| hvac unit on roof of house | 4/15/2009 |
Q: is it okay to mount an hvac unit on the roof of a house or is it a code violation? the house is ...
A: I am not sure about local(or association) codes in your area, but when I lived in Scottsdale AZ it ...
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| Leniox Furnace model VR8200 | 4/15/2009 |
Q: I have a Leniox furnace model vr8200 and I can not find the filters.. the furnace is in my attic.
A: All newer furnaces have been mandated to ship with a means of filtering integral to the unit. This ...
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| troubleshooting HVAC | 4/14/2009 |
Q: What are the symptoms of a dirty evaporator coil. What will my pressures and temperatures read. ...
A: ??? Ambient temperature is outside temperature. No relation to SEER rating except for the specific ...
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| Bryant gas furnance works randomly | 4/14/2009 |
Q: I have a Bryant Model 376CAV048095 Gas furnace. It was working randomly by turning on and off the ...
A: The circuit board powers the gas valve after a predetermined amount of time to warm up the hot ...
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| Finding A/C System leak | 4/14/2009 |
Q: During a recent checkup My mom's Lennox 10 SEER 2 ton with Armstrong indoor coil has developed a ...
A: ultrasonic leak detectors are really good at finding leaks in hard to reach places where sniffers or ...
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| rheem furnace | 4/14/2009 |
Q: I have an older rheem furnace and it has worked perfectly for the past 8 years I have owned the ...
A: On a standing pilot system where the pilot will only stay lit for a short amount of time the problem ...
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| adding an economizer to an existing system | 4/14/2009 |
Q: i have a luxaire package ac and heat unit model # dl-05ni3ataaa1 serial # noc6124606 5ton unit. The ...
A: Is this for a residential system? Most package units have the ability to accept an economizer, but ...
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| AC unit replacement | 4/13/2009 |
Q: Currently in the process of getting quotes on replacing my 13 year old AC/heating unit. My current ...
A: It's always helpful to know what area of the country that you live in in order to try to answer most ...
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| condensate pump | 4/12/2009 |
Q: i recently switched my air handler from gas to electric the problem is installing a condensate pump ...
A: When switching from gas to electric furnaces supply voltage is normally increased from 120V to 240V. ...
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| troubleshooting HVAC | 4/11/2009 |
Q: What are the symptoms of a dirty evaporator coil. What will my pressures and temperatures read.
A: Temperature difference across system in either heating or cooling will increase( difference between ...
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| Combination Boiler/Furnace Operation | 4/11/2009 |
Q: I recently saw a combination oil boiler / heat pump. How do I determine which is primary heat and ...
A: I am not familiar with these combinations. Boiler(hot water/steam) and Furnace(forced air) or oil ...
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| NuTone ComboPak HVAC | 4/10/2009 |
Q: Mr Trimborn, I currently have a Goodman combopak HVAC and have replaced just about every component. ...
A: Mark, I am not sure what you mean by a combopak? Residential split systems have a furnace inside ...
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| a.c. will not run | 4/10/2009 |
Q: Kenmore condenser unit, app. 5 yrs. old 2 ton, grandaire air handler same as ruud, brand new 2 ton. ...
A: I am assuming that this is an A/C ONLY system. Is the new tstat a honeywell T86F? Some new tstats ...
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