The Heatcraft Refrigeration 24752402 Bottom Coil Heater is an electric defrost component designed for compatible commercial refrigeration unit coolers. Operating on 230V power, it generates heat to help melt frost and ice buildup on the lower evaporator coil during defrost cycles. https://www.partshnc.com/heatcraft-24752402-bottom-coil-heater-450w-230v