| Subject | Date Asked | Expert |
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| pressure in ac on 2005 Dodge diesel | 11/13/2008 | David Hill |
Q: What should the high and low pressures be on a 2005 Dodge Ram diesel air conditioner? Thanks
A: Phil, The pressures inside your system will vary from day to day dependant upon what the temperature ...
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| Use of sight glass on air conditioning gauge set. | 11/13/2008 | David Hill |
Q: I have purchased a set of air conditioning gauges with a sight glass built in. Will this sight glass ...
A: Jim, The sight glass on the gauges themselves is only used to visually verify that the liquid ...
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| Light Bulb Issue | 11/9/2008 | David Hill |
Q: I just bought a 1986 Cadillac Deville Sedan. Under the engine hood is a assesory light. At first, ...
A: Tom, this is outside of me realm, I am the a/c and heater guy, you may want to as someone under the ...
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| mazda B4000 blower motor | 11/8/2008 | David Hill |
Q: Where is the resistor located?
A: Lisa, I can't be for certain because I do not know what year of Mazda we are talking about. ...
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| air conditioning | 11/8/2008 | David Hill |
Q: I have a 1995 dodge caravan i was just wounding if the air conditioning cycle from off to on or stan ...
A: Elliot, Yes and no. Your compressor is supposed to cycle on and off, but only under certain ...
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| a/c compressor | 11/8/2008 | David Hill |
Q: I have an '02 f250 7.3 diesel I have had many powersteering problems but have believed to have fixed ...
A: Amanda, First, yes, when you turn on the a/c you should see the clutch move in and out. As for why ...
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| 2004 suzuki grandvitara | 11/8/2008 | David Hill |
Q: where is the low pressure valve for the a/c so I can add freon
A: Anthony, Apparently the Grand Vitara came with 2 different engines. And of course the location is ...
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| 2003 Dodge Stratus | 11/7/2008 | David Hill |
Q: My heater only blow hot when i am driving at high speeds and as soon as i come to a stop it blows ...
A: Shell, What you have is a problem with your vacuum manifold, or in the vacuum lines themselves. ...
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| a/c controls | 11/7/2008 | David Hill |
Q: I have a 2004 chevy silverado with manual dual zone climate controls, can I swith the control unit ...
A: Ed, I want to say yes, as long as the plugs match up on the rear of the two units. If they do not ...
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| Auto Air con Receiver | 11/6/2008 | David Hill |
Q: I have an 1985 Toyota RJ70(Bundera), On the a/c system the receiver has two male wire connections ...
A: Burton, The wires going into the receiver should be for your high pressure switch. This is the ...
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| ac/heater turning on and off | 11/6/2008 | David Hill |
Q: My ac/ heater on 2000 durango keeps turning on and off. Original symptoms- when head lights are on ...
A: Tom, Usually I would blame this type of syptom on the relay coil itself or a bad connection, but ...
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| A/C Compressor replacement | 11/6/2008 | David Hill |
Q: I have a 97 Toyota Rav4 and a local shop has said my compressor needs to be replaced, but they want ...
A: Garrett, First, the receiver-drier and the accumulator drier are two seperate entities. The accum. ...
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| 2002 dodge truck heater. | 11/6/2008 | David Hill |
Q: My 2002 dodge truck heater only blows warm air for about 30 seconds after the you turn on the heat. ...
A: Frank, it sounds as though your blend door is opening as it should and then slowly closing back. ...
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| Climate control system partially working | 11/5/2008 | David Hill |
Q: I have a 1995 Lincon Town Car. The Climate Control System will hold the desired temperature, but ...
A: Jack, Excellent diagnosis. The Blower motor control module is nothing more than a resistor block. ...
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| air conditioning | 11/5/2008 | David Hill |
Q: can I buy a coin box for my air conditioning unit? I have a holiday home and want to rent it out but ...
A: Mrs. Love, You can do anything you want to in this day and age. I found a site ...
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| blower | 11/5/2008 | David Hill |
Q: my blower wont work and i replaced every thing that i think it would be like the fan control switch ...
A: David, What type of vehicle are we talking about here? I really can't give a very reassuring answer ...
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| ac not cooling hyundai santa fe 2001 | 11/4/2008 | David Hill |
Q: When I turn my ac on, I hear a hissing sound coming from the passenger side under dash in housing ...
A: Tony, The hissing you hear sounds to be a vacuum line. I say this because you say your low pressure ...
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| Heater | 11/4/2008 | David Hill |
Q: I recently bought an 04 Dodge Ram 1500. When you turn the temperature control knob to the red zone ...
A: Dan, It sounds as if it has been replaced at some point in time, and when it was reconnected, the ...
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| 1995 Buick Lesabre AC | 11/4/2008 | David Hill |
Q: My AC clutch recently froze up and got so hot it melted the clutch plug. I replaced the AC ...
A: Mikel, I looked at the wiring diagram for a 95 lesabre custom with the manual a/c system. From ...
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| Auto Air Conditioner Compressor | 11/3/2008 | David Hill |
Q: 1995 Buick Skylark. 1. Can I add oil to the compressor? How? My compressor has a small oil leak. ...
A: Leon, If your compressor is leaking oil, then you are also leaking refrigerant, you may not have ...
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| 2005 freightliner columbia blows hot then cold | 11/3/2008 | David Hill |
Q: I drive a 2005 frtliner columbia, and just had new compressor and drier installed,charged, and ...
A: Gregg, The only time you will have less than the perfect amount of refrigerant in the system is when ...
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| Coolant temp sensor and A/C Issues | 11/3/2008 | David Hill |
Q: I have a 1997 Ford Taurus with the 3.0L SOHC V6 which has approx. 104,000 miles on it. Past history ...
A: Stephen, Being a mechanic yourself, I'm going to ask a couple questions. After driving it around if ...
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| 2001 ford taurus heater problems | 11/3/2008 | David Hill |
Q: We changed the thermostat and make sure it wasn't air locked. The heater will not make any heat, the ...
A: Heidi, No matter how long you run the car it does not get hot? I ask this because it sounds as ...
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| Nissan Maxima Heating Problem | 11/3/2008 | David Hill |
Q: My Nissan maxima 96 has no heat. Im trying to find the vavle inside the hood that would allow me to ...
A: Omar, In the maxima, there is no "valve" so to speak to turn to allow heat to get into the car. It ...
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| auto a/c compressor | 8/23/2008 | David Hill |
Q: I have a 1997 Ford Taurus and the air compressor went out and we got a new one and the accumulator ...
A: Alvin, If you used two wires to jump the switch... you jumped the wrong switch. On the Taurus, the ...
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| air cond dual control | 8/23/2008 | David Hill |
Q: with dual manual slide climate control, I have checked with an analyzer and I am sure the mixing ...
A: Larry, It appears that part of your question was cut off before I received it. The last portion that ...
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| 1992 oldsmobile 88 air conditioning vents | 8/23/2008 | David Hill |
Q: I have a 92 olds 88 that won't blow air conditioning out the dash vents, only blows through the ...
A: Todd, Good guess. Yes this is a very good possibility. The defualt position for the ventilation ...
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| 1997 Ford Windstar | 8/22/2008 | David Hill |
Q: Okay, I have a problem with my air conditiong unit. I went to turn on the A/C the other day and I ...
A: Cheryl, As for your back vents. There is a possibility something is blocking the airflow from them, ...
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| Blower Motor '95 Riviera | 8/22/2008 | David Hill |
Q: Where is the blower motor located in the 1995 Buck Riviera? Mine slowly stopped working and needs to ...
A: Tom, From what I can gather from my literature and figures, it appears that your blower motor is ...
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| 05 Avalanche AC Clutch | 8/22/2008 | David Hill |
Q: I have a 05 Avalanche and the AC work poorly. It does blow cool air but it seems to be between 65-70 ...
A: Robert, Thank you for the very detailed question. It is rare that I receive one on here that tells ...
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| AC charge | 8/22/2008 | David Hill |
Q: I am working on a 97 chevy astro van. I have charged to AC system twice and the R134 leaks out. It ...
A: Rob, Typically a leak that large will be fairly obvious as you charge it. You should hear a faint ...
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| A/C 2004 Chevy Suburban | 8/14/2008 | David Hill |
Q: I was wondering what pounds of freon are to be in my Suburban. It is blowing hot air on the driver ...
A: Babette, I am unable to tell you the exact amount or refrigerant that your vehicle requires off the ...
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| 1992 Chevy Suburban Evaporator Core Replacement | 8/13/2008 | David Hill |
Q: David - I am looking to purchase a 1992 Suburban in mint condition, however the front A/C does not ...
A: Daryl, I have yet to see one that is not a tough replacement. I have an online service that breaks ...
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| 1993 F150 heater fan motor/wiring | 8/12/2008 | David Hill |
Q: My heater/air conditioner fan works intermittently, seeming to come on and off at will when I leave ...
A: Dale, Looking at the wiring diagram for your truck, it is a relatively simple circuit that controls ...
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| 1992 oldsmobile royale a/c | 8/12/2008 | David Hill |
Q: have an 1992 oldsmobile clutch will not engaged,have 12 volts to low pressure switch,and to high ...
A: Gregg, Glad I could be of a little help up to this point anyways. But I do have to say that I do not ...
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| 1986 Fiero GT ac cycle | 8/12/2008 | David Hill |
Q: I have a 1986 Pontiac Fiero GT V6 and would like to know how much time should there be between ac ...
A: Dave, I've heard of it, and just like the red-tek version and all of the other R-12 replacements... ...
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| 2001 1500 air conditioning | 8/12/2008 | David Hill |
Q: My 2001 Silverado air conditioning compressor seems to be locking up making a belt noise. I can ...
A: Jim, Bad news. This is a definite sign of a compressor that is shot. The compressor being locked, ...
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| 1986 Fiero GT ac cycle | 8/12/2008 | David Hill |
Q: I have a 1986 Pontiac Fiero GT V6 and would like to know how much time should there be between ac ...
A: Dave, First... nice ride. I had been looking for a project fiero GT for some time, then came across ...
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| 2001 Dodge Ram A/C goes full Hot-Cold | 8/11/2008 | David Hill |
Q: A/C goes full hot to full cold intermittently. Using the temp control knob has no affect- not ...
A: Larry, If you send me an email address in a follow-up to this question I will send you a file with ...
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| 1998 Lincoln Town Car | 8/11/2008 | David Hill |
Q: I have been having problems with my AC. When I first start the car, my MAX AC usually works from ...
A: Vicky, The first thing that comes to mind... Have you noticed your engine temperature gauge reading ...
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