The Heatcraft Refrigeration 20903 Low Temperature & Manual Defrost Controller Assembly is a KE2Therm control component designed for low-temperature commercial refrigeration and cold-storage equipment. It monitors temperature conditions and manages defrost operation, allowing technicians to initiate manual defrost when required. The controller helps coordinate temperature regulation an... https://www.partshnc.com/heatcraft-20903-low-temperature-manual-defrost-controller-assembly-ke2therm