The Samsung DA32-10109W is an essential feature within your Samsung refrigerator, meant to regulate the defrost cycle and prevent frost accumulation in the freezer compartment. This sensor continuously measures the freezer's temperature in order to serve as a temperature monitor. The sensor alerts the defrost heater when the temperature crosses a predetermined level. Any collected fro... https://www.hnkparts.com/da32-10109w-smg-defrost-sensor