This ​snapping disc thermostat switches​ will automatically ​turn ON your fireplaces blower fan when it reaches 120℉ (+/- 5℉) and ​ turn OFF your fireplaces blower fan when it reaches 105℉ (+/- 5℉), ensuring your fan operates only when needed. Suitable for ​​fireplaces ,Wood stove ,Greenhouse cooling , refrigerator cooling ,Solar water heaters,Wall & floor furnaces,and various other heating appliances. Builted to last, the temperature switches will last for ​over 100,000 operations​ under normal use, offering long-term durability and consistent . The snapping disc thermostat is designed to withstand ​environmental temperatures up to 350°F, making it suitable for high-heat applications. The ​fan control switches is suitable for use with ​up to 250V and 25A resistive loads, ensuring and reliability in your home setup.