The Thermistor Kit is an OEM part for Whirlpool refrigerators and freezers. This component plays a role in monitoring and controlling the temperature within your appliance. A thermistor is a type of resistor whose resistance changes with temperature changes, allowing the refrigerator's control system to accurately maintain the desired cooling levels based on the readings it provides.  Causes of a bad thermistor can include wear and tear from constant use, exposure to extreme temperatures that can damage the component, or electrical issues such as short circuits. Symptoms of a bad Thermistor Kit include: The refrigerator or freezer is too cold or not cold enough The appliance cycles on and off more frequently or for longer periods than normal Unexplained changes in temperature settings This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances.This part fixes the following symptomsFridge too coldFreezer too coldFridge too warm12002355 (AP4009169) replaces 1057227, 12002355VP, 12002356, 12791403, 12791403SP, 12791404, 12791404SP, 12791405, 12791405SP, 12791406, 12791406SP, 12791407, 12791407SP, 12791409SP, 12791411, 67003871, 67003872, 67004034, 67004035, 67005103, 67006645, 8208196, 8208278, AH2003772, EA2003772, PS2003772, Y67003872.