The Thermal Cut-Off Kit is an OEM replacement part for Whirlpool dryers, responsible for protecting the dryer from overheating by interrupting the power flow to the heating element if the dryer air temperature reaches a dangerously high level.   Symptoms of a bad Thermal Cut-Off Kit include: The dryer not heating up  Excessive heat buildup within the dryer drum  Clothes not drying properly   Causes of failure can include restricted airflow from a clogged lint filter or venting system or a malfunctioning heating element causing excessive temperatures. These issues can lead to the thermal cut-off being triggered to prevent overheating, necessitating the replacement of the kit. This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances. Note: It's possible some models may use part number 280148 in place of this. Look at photo's for verification.This part fixes the following symptomsToo hotPart Number 279973 (AP3094323) replaces 279973VP, 3391913, 3404151, 3404152, 3977395, 8318314, 897710, AH334387, EA334387, PS334387.