The heater has resistance but not defrost. How can I check the heater power supply on the p1?
Answer Hello You. If the heater and defrost thermostat are good, you will need to order and replace the defrost control on the unit. This is the only other part in the defrost cycle. The defrost control board W10219463 has been permanently discontinued by the manufacturer and we don't know of any source or replacement for the part.