Refrigerator Defrost Thermostat, Sensor

This temperature sensor (thermistor) detects internal appliance temperature and sends readings to the control board so the unit maintains proper cooling. Replacing a failing sensor restores accurate temperature monitoring and helps prevent spoilage. What it does:

• Measures internal temperature and provides a resistance-based signal to the control board
• Helps the control system regulate compressor and defrost cycles
• Commonly causes warm or fluctuating temperatures, prolonged cooling, or temperature-related error codes when failing
• Works as a direct-sensing temperature input — not a user control or switch

• One temperature sensor/thermistor (single part as shown)

• Unplug the appliance or switch off power at the breaker before servicing
• Handle the sensor and its thin leads carefully to avoid damage during removal and installation
• Route and secure wiring so it does not contact moving parts or sharp edges

Fix ice maker frost buildup with this refrigerator defrost cable. Connects ice maker to defrost system to melt frost and maintain ice production.

Refrigerator not cooling or freezing over? This defrost thermostat monitors evaporator temperature to control defrost cycles. Easy DIY fix restores cooling.

Fixes excessive frost buildup on evaporator coils by restoring proper defrost cycles. This clip-mount bimetal sensor opens and closes based on temperature.

Fix refrigerator frost buildup, freezer not cooling properly, or excessive ice formation. This defrost thermostat regulates defrost cycles to prevent issues.

Frost buildup in freezer? The defrost thermostat monitors temperature to trigger defrost cycles. Test with multimeter when cold for continuity check.

Fix frost buildup or warm temperatures with this defrost thermostat. Regulates defrost cycles to prevent ice accumulation. Moderate difficulty repair.

Freezer icing over or building up frost? A faulty defrost thermostat prevents proper defrost cycles. Common DIY repair requiring basic tools and testing.

Fixes frost buildup in freezer or refrigerator running too cold. This defrost thermostat regulates defrost cycles to prevent ice accumulation. Easy repair.

This defrost thermostat helps control the refrigerator/freezer defrost cycle by sensing evaporator temperature and allowing the heater to run when frost removal is needed. Replaces a failed thermostat to restore normal defrost operation. What it does:

• Closes when the evaporator is cold so the defrost heater can run, then opens when the coil warms to stop defrosting
• Helps prevent excessive frost and ice buildup on the evaporator coil
• Common symptom: visible frost or ice on evaporator, excessive frost buildup, or defrost heater running constantly/ not at all
• Works with the defrost system to maintain efficient cooling performance

• One defrost thermostat

• Disconnect power to the appliance before starting any repair
• Mount on or near the evaporator coil as originally installed; secure wiring away from moving parts
• Inspect the harness and connector for damage; replace if corroded or brittle
• Test for continuity with a multimeter to confirm thermostat function before and after installation

If your refrigerator isn't cooling properly or runs constantly, a faulty temperature sensor may be the cause. This thermistor monitors interior temps.

Fixes inconsistent cooling or frost buildup caused by faulty temperature sensing. This refrigerator defrost thermostat restores accurate readings.