Have HVAC Questions? Ask an HVAC Expert for Answers
Hello and thanks for using this service, if you have been waiting do not worry or get upset. I am APPLIANCE-HVAC GURU a very experienced tech on here and I try to get to as many customers as I can. I just picked up your question now.
Please allow time for me to respond, sometimes I get the questions or responses late so please be patient as I have no control over the site issues. NOTE, I have nothing to do with your payment to the site and did not receive that money.
If it will not turn off with the thermostat you should see if it shuts off when you disconnect the wires from the unit in the attic. If not you have a bad relay on the control board. More than likely a hardware component on the control board itself has failed causing that issue and the board will need to be replaced. Not much else will cause that problem.
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