Question about Goodman CLQ36AR49 Air Conditioner

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Will not go into defrost

I installed a goodman 2 ton heat pump 2 months ago. heat and cool mode works fine but will not go into defrost. installed a new defrost board today still does not work. checked voltage at the condencer and air handler the thermostat wires have at least 24 volts at each wire . what could be the problem? thanks Tim

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  • adamatim Dec 06, 2008

    thermostat has not been changed . checked all the wires and are correct.

  • adamatim Dec 06, 2008

    the board was brand new today,more than likely it is not bad. if all the wires are correct on the thermostat , what else could it be ? by the way, thanks for the reply's

  • adamatim Dec 06, 2008

    got ya. thanks i'll check that tomorrow, i didn't even think of that. any good suggestions about how to check it ?

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Did you change the thermostat in heat pump? or did you change it when you replaced the board?

Posted on Dec 06, 2008

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  • Armando Bernal Dec 06, 2008

    Your thermostat inside the house may have to be reconfigured, or if defrost is directed by the unit, then identify which pin timer to use and change the setting on your heatpumps temp to kick on. The only thing that could keep the defrost from comming on would be the thermostat that plugs into defrost board, or the board itself being faulty. Those pumps can be a pain..

  • Armando Bernal Dec 06, 2008

    Never mind the board or the wires, I'm talking about the thermostat in the heat pump, connected to the defrost board, and cliped to one the of the units coils. That may have failed.. And no problem about the reply's, I just wish I was there with you, I would fix it right away.

  • Armando Bernal Dec 06, 2008

    Yes, pull it off and replace it! Hope this fixes it. Usually board comes with new therm, make sure you didn't throw it way with box. Get with your supplier and see if they normally come with them, or just buy it it's not expensive. And double check your defrost wire from unit to furnace/airhandler, sometimes it looks like it's connected correctly, pay attention to schematics.

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