Problem with fan coming on in heat pump unit - http://www.hvacmechanic.com/ Forums
Original message
| mburlend
 |  "Problem with fan coming on in heat pump unit"
, posted Fri 27 Jun 15:40  
So recently I have started having a problem with my home heat pump, it is a Goodman. What happens is the thermostat turns on the compressor, but the air handler fan does not turn on to circulate the air inside the house. I have talked with the thermostat customer service and they say their thermostat only has one relay on it and I know that relay is working. I tried changing out the thermostat and the problem remained. The problem is intermitent, which is always the most frustrating. I can't find any information anywhere with someone else having this problem. I had an AC man out to look at it and he just said it was a bad thermostat which wasn't much help as I have pretty much ruled out the thermostat being the problem. Does anyone have any ideas? Much appreciated.
Matt
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Replies:
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| Houston204
| "Re(1):Problem with fan coming on in heat pump" , posted Fri 27 Jun 19:19
Sounds like a bad board in the air handler.
I would rule out the capacitor and the motor drawing excessive amperage first. You would need an amp meter and a cap meter. (A Fieldpiece meter would do both)
Have you visually inspected for any melted wiring?
"Tip of the Day" Remember to remove power first.
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| | oldmangobles
| "Re(2):Problem with fan coming on in heat pump" , posted Sat 28 Jun 14:36
could this be locking up in defrost mode?is the indoor coil getting cold with no fan operation?the unit ,in heat mode ,will periodicly defrost itself by reversing the refrigerant.is there a defrost LED light in the outdoor unit?if so,next time it happens,check the light.
old man mike
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