This DIY repair guide gives step-by step instructions for how to replace a refrigerator thermistor. The thermistor senses temperature changes in the refrigerator and sends the control board a signal about the temperature change. If the thermistor fails, the refrigerator won't stay at the temperature you set, resulting in items either freezing or spoiling because it's too cold or too warm. Replace the thermistor with the manufacturer-approved replacement part that fits your model.
Watch our troubleshooting video to determine whether the thermistor in your refrigerator is working. Although the thermistor in this video might be in a different location, the troubleshooting is the same.
Use this basic procedure to replace the thermistor in Kenmore, Frigidaire, Whirlpool, GE, Maytag, Amana, KitchenAid, Samsung, LG, Gibson, Crosley and Haier refrigerators.
Disconnect electrical power
Unplug the refrigerator or shut off the circuit breaker for the refrigerator.Tip: Move highly perishable food to a cooler or other cooled space. The refrigerator will be without power for about 30 minutes, which shouldn't affect most refrigerated or frozen foods.
Remove the thermistor cover
Locate the thermistor in the refrigerator section; it’s under a small plastic cover attached to the surface of the back wall, side wall or ceiling.
Release the thermistor cover and pull the thermistor out of the cover.Tip: See the parts list diagram for your refrigerator for help locating this component.
Release the thermistor cover.
Remove the thermistor
Pull the thermistor out of the mounting clip and unplug the wire harness. Remove the thermistor.
Remove the thermistor.
Install the new thermistor
Attach the thermistor to the mounting clip and then to the wire harness.
Attach the cover
Reattach the thermistor's cover and reinstall any shelves you removed.
Restore electrical power
Plug in the refrigerator or turn on the house circuit breaker to restore power.
If the temperature in your refrigerator doesn't match the temperature you set, the problem could be the temperature control board—a service technician can give you a definite diagnosis. If the board is at fault, follow these steps to replace it yourself.
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