The SMG DD81-02152A is a thermistor, a type of resistor whose resistance changes significantly with temperature. Specifically, this part is a genuine Samsung replacement thermistor designed for use in their dishwashers. Its primary function is to monitor the water temperature inside the appliance.By detecting the water's heat, the DD81-02152A sends temperature readings to the dishwash... https://www.hnkparts.com/dd81-02152a-smg-thermistor