The Main Power Control Board is an OEM replacement part for Frigidaire refrigerators. It is the central processing unit that controls all electrical functions and components within the refrigerator. The board receives input signals, processes them, and sends output signals to regulate temperature, monitor sensors, power accessories, and run diagnostics. Symptoms of a bad main power control board include: Fluctuating or inconsistent temperatures   Components not functioning properly Error codes appearing Intermittent or complete power failures Causes of failure can include moisture damage, power surges, component degradation over time, or physical damage. This OEM Frigidaire replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore models.5304499076 (AP5971611) replaces 242009021, 5303918522, 5303918537, A01165005, 242009006, 242009006A, 242009023, 242009028, 242009028A, 4245958, 5303918532, PS11703793.