The Beverage Air 502-171A Refrigerator Defrost Timer (120V, 60Hz) is a reliable OEM replacement component designed to regulate the defrost cycle in commercial refrigeration units. Built to precise specifications, this timer ensures your Beverage Air refrigerator automatically initiates and terminates defrost cycles at the appropriate intervals, preventing excessive frost build-up and ... https://partsfe.ca/timer-defrost-for-beverage-air-part-502-171a