The Whirlpool Defrost Timer is an OEM replacement part for Whirlpool refrigerators. The defrost timer regulates the automatic defrost cycle, which prevents ice buildup on the evaporator coils in the freezer compartment by sending a signal to the defrost heater to turn on and melt any ice buildup on the coils. Once the defrost cycle is complete, the timer signals the heater to turn off, allowing the coils to cool and return to their normal temperature. If the defrost timer malfunctions, the automatic defrost cycle may not initiate or complete properly, causing ice buildup in the freezer compartment, which can lead to reduced cooling performance or other issues. Symptoms of a bad Defrost Timer include: Excessive frost buildup in the freezer compartment The refrigerator or freezer not maintaining the set temperatures Unusual noises coming from the appliance  The appliance running continuously without cycling off 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 symptomsToo warmFridge runs too longFridge too coldFrost buildupFreezer not defrostingFreezer too coldWon't startFridge too warmLeakingFreezer section too warmNoisyW10822278 (AP5985208) replaces 482493, 14210016, 2188372, 2188376, 4262692, 4318057, 482489, 548044, 56906, 790077, 850038, 850343, 850344, 850345, 850609, 850695, 850731, 850845, 850847, 850878, 850879, 851061, 851106, 851200, 851269, 851701, 851971, 943436, 945513, 945514, 978266, 978472, 989280, 989281, CC309, CC904, CC906, D70041-12, D7004112, FSP482493, GP6, GP9, PS11723171, R0950029, W10740039, W10822278VP, Y0053736, Y0055525, Y0056627, Y0056768, Y0056906, Y0311209.