The Defrost Thermostat is an OEM replacement part for Frigidaire refrigerators. This component plays a crucial role in regulating the defrost cycle, which is responsible for removing any built-up frost or ice from the freezer compartment. Symptoms that may indicate the need to replace the defrost thermostat include: Excessive frost or ice buildup in the freezer The refrigerator not maintaining proper temperature levels The defrost cycle failing to initiate or complete properly Causes of a faulty defrost thermostat can include normal wear and tear over time, electrical malfunctions, or exposure to extreme temperatures or moisture. This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore refrigerator models.This part fixes the following symptomsFreezer not defrostingFridge too warmFreezer section too warm5303918202 (AP2150133) replaces 241619705, 833603, AH469510, EA469510, PS469510.