Unless the OEM says something different, look for 5-6 volts DC to the defrost sensor from the heat pump's defrost control board. Take time to diagnose the problem correctly. Spending this time and ...

Company: RAE Corp. Product: Centinel™ Intelligent Defrost Control System Description: The Centinel Intelligent Defrost Control System consists of a microprocessor-driven controller, four temperature ...

Defrost control board: Regulates the defrost cycle to melt ice that accumulates around the evaporator in the freezer. 7. Air damper: Shutters on the damper control the airflow from the freezer ...

The Board Might Still Be the Issue A certified tech wrote that if the fridge freezes everything, and the sensor checks out fine, the problem might be the MPCB. That’s the control board.