bi-metal thermostat is used in most home laundry,and also for refrigerator,air conditioner,heater unit,oven,and ... -301Abi-metal thermostat:KSD301A series Thermostats are used in most home laundry,and also for refrigerator,air conditioner,heater unit,oven,and ... .Thermostat open on rise or close when the temperature differential is reached. All thermostats are both U.L. Recognized and CCC ...