Have had to reset Rheam heat pump almost daily. Coils are clean inside and out. Tech came and said pressure is a little high (low side 50, high side 175 at 30 F outside and 65 F inside).
Tech replaced contactor switch, defrost board, still same problem. Now tech says need to replace drier for possible restriction. Takes too long to equalize (3-4 minutes) after shutdown.
This is getting expensive. Tech knows AC but apparently not so much heat pump.
System sounds noisy to me - hissing sound much louder than in air conditioning mode.
Any suggestions of good questions to ask tech - I'd call someone else but don't have any leads on someone who knows their stuff.