Refrigerator Defrost Thermostat, Sensor

This external temperature thermistor senses refrigerator compartment temperature and helps the control board maintain stable cooling. Replaces a failed or inaccurate sensor to restore correct temperature readings and cycling. What it does

• Monitors air temperature in the fridge/freezer compartment so the control board can regulate cooling
• Can cause incorrect temperatures or excessive run time when the sensor reads inaccurately
• Useful when you see temperature fluctuations, weak cooling, or inconsistent compressor cycling
• Works as the sensor input for automatic defrost and temperature-control routines

• One external temperature thermistor (sensor)

• Disconnect power to the appliance before starting any repair
• Access may require removing interior liners, shelves, or an access panel; keep track of fasteners
• Handle the sensor lead and sensing element carefully to avoid damage

This mechanical refrigerator thermostat regulates interior temperature, letting the compressor cycle on and off to maintain your set cooling level. It's a direct replacement for worn or unresponsive temperature controls to restore consistent cooling. What it does:

• Senses cabinet temperature and signals the compressor to run or stop to maintain setpoint
• Replaces a thermostat that won't hold temperature, causes continuous running, or prevents cooling
• Works with manual temperature-control knobs (mechanical sensing and switching)
• Typical failure symptoms: refrigerator too warm, too cold, or compressor that runs constantly or not at all

• Disconnect power before attempting any service to avoid shock or damage
• Access may require removing control panels or shelves; keep track of mounting screws and orientation
• Confirm wiring and terminal placement match the old thermostat before final connection

This temperature sensor assembly reads internal refrigerator temperature and sends the signal to the control board so the appliance maintains proper cooling. Replacing a failed sensor restores accurate temperature monitoring and consistent operation. What it does:

• Monitors fresh food/freezer compartment temperature and reports readings to the control board.
• Helps the fridge cycle the compressor and fans correctly based on actual temperatures.
• Common symptoms of a failing sensor: inconsistent temperatures, food spoiling, compressor running more than normal, or erratic cooling.
• Works with the control system to support ice maker and defrost control when applicable.

• One temperature sensor assembly

• Always unplug the appliance before servicing to avoid electrical shock.
• Handle the sensor and wiring gently; avoid pulling on wires or bending the probe excessively.
• Verify connector orientation and secure routing to prevent pinching from the door or shelves.
• Test the sensor and control board connections with a multimeter per OEM instructions.