547-121

This 7-inch high limit switch is a critical safety component designed for HVAC systems, furnaces, and various heating appliances. Functioning as a thermal cutout, this switch protects your equipment by automatically interrupting the electrical circuit if internal temperatures exceed a safe threshold. With a fixed temperature rating of 170°F, it prevents overheating and potential damage to sensitive components. The switch features an automatic reset mechanism that re-engages once the temperature drops by 20 degrees, ensuring your appliance returns to safe operation without manual intervention. Replacing a faulty high limit control is essential for maintaining the efficiency and safety of your heating system.
Type: High Limit Control Switch
Size: 7-inch
Dimensions: 7 in
Application: Commonly used in residential and commercial HVAC systems, furnaces, and other high-output heating appliances as a primary safety sensor to prevent thermal runaway.
Specifications: Temperature Open: 170°F; Temperature Close: 150°F (20°F differential); Switch Type: Normally Closed (NC); Reset Type: Automatic