Sounds like it could be an issues with your defrost control board this device allows the fan to shut off during the defrost cycle of operation in cooling the relay is in the closed position allowing power to the fan this relay on the board could have bad contacts a highly suggest calling a contractor that specializes in heat pumps and would also question why a part was replaced and you still have the same problem did they credit you any money back?
Answers & Comments
Sounds like it could be an issues with your defrost control board this device allows the fan to shut off during the defrost cycle of operation in cooling the relay is in the closed position allowing power to the fan this relay on the board could have bad contacts a highly suggest calling a contractor that specializes in heat pumps and would also question why a part was replaced and you still have the same problem did they credit you any money back?