The TRUE 800316 Refrigerator Defrost Switch W/ 3 Wires controls the defrost cycle in compatible commercial refrigeration equipment. This temperature-sensitive switch responds to evaporator coil temperatures, regulating power to the defrost heater during operation. Its three-wire configuration provides electrical connections for the defrost system. The component prevents excessive heat... https://partsfe.com/switch-defrost-for-true-part-800316/1-800316.html