547-124

This 7-inch high limit switch is a vital safety component engineered for gas furnaces and forced-air heating systems. Designed to monitor the temperature within the heat exchanger, this thermal limit control acts as a safeguard against overheating. If the internal temperature reaches an unsafe threshold of 170°F, the switch automatically interrupts power to the burner or heating element, preventing equipment damage and ensuring home safety. Featuring a 30°F differential, the switch is designed to reset once the system cools to a safe operating temperature of 140°F. This replacement part is essential for HVAC repair when a furnace is short-cycling or failing to stay lit due to a faulty safety sensor.
Type: Furnace High Limit Safety Switch
Size: 7-inch probe length
Dimensions: 7 inches
Application: Residential gas furnaces, forced-air heating units, and HVAC heat exchanger safety monitoring
Specifications: Trip Temperature: 170°F (L170); Reset Differential: 30°F (30F); Normally Closed configuration; 7-inch insertion depth