snap action thermostat is used in most home laundry,&also for refrigerator,air conditioner,heater unit,ovenand limit application Snap-Action ... most home laundry,and also for refrigerator,air conditioner,heater unit,oven,and limit application,Automobile.Thermostat open on rise or close ... No. CQC03002006387 ISO9001:2000 File No. QM1650 Snap-Action Automatic thermostat KSD-301P