Refrigerator defrost thermostat kit. L55-20F. The defrost thermostat monitors the temperature of the evaporator coils. When the coils drop below a set temperature, the thermostat sends power to the defrost heater. If the defrost thermostat is defective, the refrigerator will not defrost.
Defrost thermostat kit, 60 degrees
Defrost thermostat kit with wires, L50-20, interchangeable brackets, and crimp-style wire connectors