Have HVAC Questions? Ask an HVAC Expert for Answers
hi i am dan i can help you with this. if you pull the thermostat off the sub base on the wall does the A/C turn off?
ok next if you turn the power off to only the airhandler inside does the outdoor unit still run?
ok next i would turn the power off to the furnace and check the wires and circuit board in the furnace and at the thermostat to make sure noting is burned or shorted and the wires aren't touching each other
ok in the outdoor unit there is a circuit board in there for the defrost we need to see what we have between the C and Y terminals on that board
did you still need assistance with this?