I have a trane heat pump, last year I replaced the defrost board. This year the heat pump goes on. Then I can hear the thermostat click and compressor go off. I know the interior blower is to go off after one or two minutes, but blower continues to run and I have to switch the main breaker off. This only happens at night, in the day works great.
Please help.

And they said,"nothing can stop a train"