Heating, Air Conditioning, Fridge, HVAC/gas pack troubleshooting

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Question
Joe,
  I have a 2.5 ton Rheem gas pack that the fan runs for about 60 seconds when you switch it on at the thermostat and then shuts off and the unit doesn't fire up. I have switched the power off and back on at the breaker. I am a very good DIY guy but I need a little direction on where to start with troubleshooting this.

Could you helplease

Answer
Mike,

Gas pack referring to a packaged unit , if so what fan are you talking about the blower ? If so and you put the fan switch from auto to ON the blower motor should run 24/7 independent of either the heat or cool. If this is what you describe then you would need to find the fan relay 24 volt coil and put a voltage tester on the coil side to make sure relay is not dropping out. If you have steady 24 volt ac then you would need to find your two power wires feeding the blower motor to make sure you have constant 220 volt ac ( if that is the voltage feeding your motor ) also free spin the blower wheel , the wheel should turn many revolution before it stops ,indicating the motor is not binding up. As a last reset you can replace the run capacitor. Making sure you get the correct MFD and voltage rating.

Heating, Air Conditioning, Fridge, HVAC

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Joe

Expertise

40+ years diversified experience.An HVAC/Refrigeration Self Employed Contractor since 1986. NATE Certifield. Answer questions pertaining to Residential and Commercial Air Conditioning , Warm Air Heating, Heat Pump systems.Mechanical and Electrical troubleshooting of these systems.Be as detailed as possible when describing problem.Packaged unit or split systems.No appliance questions.

Experience

Installation and Troubleshooting, Mechanical and Electrical, in following areas, Refrigeration ( Walk In and Reach In Coolers and Freezers ) Commercial Roof Top and Packaged Heating/Cooling ( Natural Gas,Propane, Electric, and Heat Pumps ) Computer Room Air Conditoning Systems,Commercial Residential Packaged and Split Systems Air Conditoning and Heat Pumps.Warm Air Oil , Natural and Propane Gas Heating systems.

Education/Credentials
Graduated from Private Technical School in 1975. An HVAC/Refrigeration Contractor . Have Unlimited Heating/Piping and Cooling Contractor License.Limited Sheetmetal Contractors License.NATE Certifield. York Certifield Master Heat Pump Technician 1986. Served 33 years combination Active Duty Air Force , Air Force Reserves and Air National Guard in the HVAC/Refrigeration Shop/Mechanical Shop. Troubleshooting/Installing HVAC/Refrigeration Equiptment Worldwide. Retiring in 2003 as a Senior NCO ,and a Mechanical Superintendent.

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