The Delfield 2194808 Refrigerator Thermostat Defrost Probe monitors temperature conditions at the evaporator during the defrost cycle. Its sensing element detects thermal changes and communicates with the control system to initiate or terminate defrost operation at the appropriate point. This responsive feedback helps prevent excessive frost accumulation while avoiding unnecessary hea... https://partsfe.com/2194808-delfield-probe-tstat-defrost