My A/C ( Rheem RPKA-049JAZ) will start blowing hot air while in the auto cool setting...I turn off all the power to the unit and wait 30-60 minutes...when I turn it back on, it will work for a couple of hours to several days before doing this again...I have a few ideas of what may be wrong and would like someones opinion...
Is it possible for the unit to "think" it needs to defrost while in the "auto cool" mode or is defrost only available during "heat"? Is it possible to bypass this alltogether? I live on the coast in Mississippi. In the eight years I have lived here, I have used the heater twice and really don't care if the heater worked. I just need the A/C.
Is it possible that it could have intermittent 24vlt loss to the defrost board/contactor, because cutting all power to the unit for 30 or so minutes will allow it to start working properly again?
I placed the thermostat into a call for heat and checked the defrost board test pins and it went into and back out of defrost...
Any Ideas?
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