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I bought the brand new Honeywell TH6320U1000 5-1-1 Programmable Thermostat. It works for heat pump. The HVAC service guy came and set the thermostat and air handler wiring. He said if i got the new...

thanks for your reply.

Thanks for the reply from jadashua.

The heat pump is not running at all but the inside furnace fan works and gets some heat. I just changed the defrost circuit board...

I live in Virginia. The temp is around 45F. I have Ducane heat pump outside. it is not running at all but the inside furnace fan is working well. I just changed the defrost circuit board since the...