Hoover Refrigerator RTM17010 Freezer section too warm

The Defrost Bimetal is an OEM part for Whirlpool refrigerators. It acts as a safety thermostat that monitors and controls the temperature during the defrost cycle. This component ensures that the defrost heater turns off when the evaporator coil reaches a specific temperature, preventing overheating and potential damage.

Causes of failure may include a malfunction due to wear and tear over time, electrical failure, or damage from moisture and ice.  

Symptoms of a bad Defrost Bimetal include:

• The refrigerator is constantly running without cycling off
• Frost buildup on the evaporator coils, leading to reduced cooling efficiency
• The refrigerator or freezer compartment is too warm
• Unusual fluctuations in refrigerator temperature

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

This defrost thermostat senses the evaporator coil temperature and controls the defrost heater. Replacing a failed thermostat restores proper defrosting to prevent heavy frost buildup and helps your refrigerator keep consistent, reliable cooling.

• Monitors evaporator temperature to allow the defrost heater to energize and to terminate the cycle as the coil warms
• Protects against overheating in the evaporator area during defrost
• Failure symptoms include frost/ice buildup on the evaporator cover, reduced airflow, fresh food section warming, or the unit not defrosting
• Typically mounts clipped to the evaporator tubing inside the freezer

• Disconnect power before servicing and remove the freezer's rear panel to access the evaporator
• Transfer the clip/bracket if present and mount the new thermostat in the same location, ensuring firm metal-to-metal contact with the evaporator tubing
• Route wires away from the heater and moving parts; secure connections and reassemble panels before restoring power
• Wear cut-resistant gloves—sheet-metal edges can be sharp