Whirlpool WP627985 Bimetal Defrost Thermostat for Refrigerator

The Whirlpool WP627985 Refrigerator Bimetal Defrost Thermostat is a component of the frost management system in a refrigerator. This part acts as a temperature switch that monitors the temperature inside the freezer compartment. When ice builds up on the evaporator coils, the temperature in the compartment increases. Upon reaching a specific threshold, the bimetal defrost thermostat activates the defrost heater, which then melts the accumulated ice. Once the temperature drops below the preset level, the thermostat resets, turning off the heater and allowing the evaporator coils to freeze again. This process helps manage frost buildup, which can interfere with airflow and reduce cooling efficiency.