Question about Intertherm P3RA-048K Air Conditioner

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Not heating I have a Intertherm. the heater does not turn on, I can get the fan and every thing to turn on but not the heating coil. the heating coil starts but then shuts off before the fan kicks on.

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1st you said the fan runs..but partial info so best guess it fan limit contor bad.

Posted on Jan 10, 2009

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Intertherm MGHA-070ABFC-05 will not run/cool


Multiple problems. Eliminate thermostat first. Remove face from wall and turn on breaker. If fan still runs you have a bad board or bad relay. If fan outside is running compressor should be too. These operate on same contactor. Verify you are getting 24 volts to coil side of contactor. If odf stops working and contactor remains pulled in you have a bad motor. If odf motor stops working the compressor will shut off due to overheating.

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Heating coil comes on first. When heat gets to a specific level, fan comes on. Fan stays on after coil is de-energized until heat drops back to that same specific temperature.

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Dec 18, 2009 | Intertherm Air Conditioners

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I have an intertherm electric furnace FEH-A020, with multispeed blower installed when A/C added. My problem is blower operation. at the end of the cooling season with fan set to auto operation the fan ran...


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Oct 17, 2009 | Intertherm P3RA-048K Air Conditioner

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When was the last time you had the coils in the condenser cleaned. Dirty coils can insulate the refrigerant tubes, causing the fan to constantly run in order to try and cool down the refrigerant returning from the evaporator coils(a-coils) in supply ducting, But can.t because the condenser coils are insulated not allowing the heat to escape. I would try this first before replacing expensive parts. It is the small things that we overlook that is most likely the source

Aug 22, 2009 | Intertherm P3RA-048K Air Conditioner

1 Answer

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I am assuming this is a heat pump? (Typical when the t-stat has a green light.).

Please confirm

If a heat pump, is the outdoor unit frozen up? There can be some frosting, but it should not be a block of ice.

If there is an emergency heat switch on the t-stat, can you flip that to emergency heat? Do you get heat then?

Pleas advise and I can help you troubleshoot this problem further.

Jan 30, 2009 | Intertherm P3RA-060K Air Conditioner

2 Answers

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Nov 23, 2008 | Intertherm P3RA-048K Air Conditioner

1 Answer

Intertherm heat coils won't stay off until breakers off,thermostats are off


it is the heat sequencers. it happens all the time. replace them wire by wire to keep it simple. they are located behind the metal next to the breakers they look like this: cdf7518.jpg

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