Thermador Cogged Freezing Defrost Drain Parts

The Defrost Thermostat is an OEM part for Whirlpool refrigerators. It is responsible for monitoring the temperature of the evaporator coils. When the coils reach a certain temperature, the thermostat signals the defrost heater to turn on and melt any ice or frost buildup. This ensures proper airflow and prevents excessive ice formation.

Causes of a bad defrost thermostat can be attributed to normal wear and tear over time or electrical malfunctions.  

Symptoms of a bad defrost thermostat include:

• Excessive ice buildup in the freezer section.
• Inadequate cooling in the refrigerator compartment.
• Frost or ice accumulating on the evaporator coils.

This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances.

The Defrost Thermostat is an OEM part for Whirlpool refrigerators. The thermostat monitors the temperature of the evaporator coil and signals the defrost heater to turn on or off to prevent frost buildup, ensuring efficient cooling.

Causes of a bad defrost thermostat can include wear and tear over time, exposure to extreme temperatures, or electrical malfunctions.  

Symptoms of a bad defrost thermostat include:

• Excessive frost buildup in the freezer
• The refrigerator not maintaining the correct temperature
• The defrost heater not activating
• The refrigerator running continuously or not running at all

This OEM part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore models.

This defrost bi-metal thermostat senses evaporator temperature during the defrost cycle and opens to stop heater power at the safe cutoff. Replacing a failed thermostat restores reliable defrosting and helps prevent ice buildup that restricts airflow and cooling.

• Monitors evaporator temperature to control the defrost heater
• Closes when cold to allow defrost; opens at cutoff to terminate defrost and prevent overheating
• Helps maintain clear evaporator coils for proper airflow
• Common symptoms: heavy frost on the back wall/evaporator, poor cooling, or defrost heater not energizing

• Disconnect power before servicing; wear cut-resistant gloves
• Access the evaporator; mount the thermostat in the original location with firm contact on the tubing
• Transfer any original clip or insulation as found to ensure proper sensing
• Secure all connections and route wiring away from the heater and moving parts; clear existing ice before restoring power

This mechanical defrost timer cycles a refrigerator's compressor and defrost heater to prevent frost buildup, restoring normal cooling and reducing ice accumulation. It replaces a failed or stuck timer to help maintain consistent defrost intervals. What it does:

• Advances the unit between cooling and defrost modes on a timed schedule
• Sends power to the defrost heater during defrost cycles to melt frost and ice
• Prevents excessive frost buildup that can block air flow and reduce cooling efficiency
• Common symptom: refrigerator runs continuously or doesn't defrost, causing frost/ice buildup

• Disconnect power before servicing to avoid shock or injury
• Replace with the exact timer specified for your model; match mounting and connector type
• Handle wiring and connectors gently; secure all connections and mounting fasteners

This defrost heater melts frost and ice from the evaporator to help restore normal airflow and cooling performance. It replaces a failed heater to reduce excessive frost buildup and repeated frost cycles. What it does:

• Heats the evaporator during the defrost cycle so accumulated frost and ice melt away
• Helps prevent airflow restriction and reduced cooling caused by frozen evaporator coils
• Commonly replaced when you see excessive frost, frequent defrost cycles, or poor cooling in the refrigerator/freezer
• Works with the freezer's defrost control system (timer/thermostat/board) to run only during defrost

• Disconnect power before servicing to avoid shock or injury
• Inspect surrounding components (defrost thermostat/thermistor and wiring) for damage; replace if faulty
• Handle the evaporator and heater carefully—avoid bending coils or damaging fins