The Heatcraft 5709-L Defrost Termination/Fan Delay Thermostat is a temperature-sensitive control designed for compatible Heatcraft refrigeration evaporators and unit coolers with electric defrost systems. It monitors evaporator coil temperature and switches electrical contacts to terminate the defrost cycle and delay fan operation until the coil reaches the appropriate temperature. Th... https://www.partshnc.com/heatcraft-5709-l-defrost-termination-fan-delay-thermostat-35-f-close-55-f-open