Kitchenaid Defrost Thermostat, Sensor

This bimetal defrost thermostat monitors evaporator temperature and helps control the defrost cycle so frost doesn't build up on the evaporator. It replaces a failed thermostat to restore proper defrost operation. What it does:

• Opens or closes the defrost heater circuit based on evaporator temperature
• Prevents the heater from running when the evaporator is warm
• Helps stop excessive frost buildup that can reduce cooling performance
• Common symptom: repeated frost/ice buildup or defrost heater not cycling

• One bimetal defrost thermostat

• Disconnect power to the appliance before servicing
• Access may require removing the evaporator cover or rear panel
• Avoid crushing or bending the sensing element during installation
• After installation, verify defrost operation and wiring connections; test continuity with a multimeter according to service manual procedures

This thermostat regulates appliance temperature to help maintain proper heating and cycling for safe, consistent operation. It replaces a failed thermostat to restore correct temperature control and reduce unexpected shutoffs or inconsistent heat. What it does:

• Senses and opens/closes the circuit to control heating elements or compressors
• Can stop heating when the set temperature is reached to prevent overheating
• Commonly used when the appliance won't reach or maintain the correct temperature
• Helps address intermittent heating, continuous running, or overheating symptoms

• Disconnect power before servicing to avoid shock or injury
• Handle thermostat terminals carefully; ensure secure, correct wiring connections