The National Brand Alternative 631501 Defrost Thermostat is designed as a direct replacement for select Whirlpool refrigeration systems. Engineered to restore proper defrost cycle performance, it replaces older or failed thermostat models including 482697 and 482290. This component helps regulate temperature during the defrost cycle, preventing ice buildup and ensuring efficient refrigerator operation. Built with durable materials and precise temperature control, this thermostat provides dependable performance for long-term appliance maintenance. Ideal for technicians or homeowners performing repairs, it fits a range of Whirlpool models requiring the 631501 thermostat.