This DIY repair guide gives instructions for replacing the thermistor in a top-freezer refrigerator. The thermistor is inside the control box and detects the temperature in the fresh-food section of the refrigerator. The thermistor sends a signal to the electronic control board to tell it what the refrigerator temperature is. 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 a manufacturer-approved refrigerator part.
Watch our troubleshooting video to determine whether the thermistor in your refrigerator is working.
This guide shows how to replace the thermistor in some Kenmore and Frigidaire top-freezer refrigerators. Although the location of the thermistor may differ, the same basic replacement procedure can also be used for some Whirlpool, GE, Maytag, Amana, KitchenAid, Samsung, LG, Gibson, Crosley and Haier refrigerators.