543-505

This professional-grade 3-inch adjustable fan control switch is a vital safety and performance component for residential and commercial heating systems. Engineered to regulate blower motor activity, this high-limit control ensures that your furnace fan operates at optimal temperature intervals, enhancing energy efficiency and preventing equipment overheating. By sensing the air temperature within the plenum, the switch automatically cycles the fan on and off, ensuring consistent heat distribution and protecting the system from thermal stress. Ideal for furnace repair and HVAC maintenance, this adjustable limit switch provides a reliable solution for maintaining a safe and comfortable indoor environment.
Type: High Limit Fan Control Switch
Size: 3-inch probe
Dimensions: 3 in
Application: Commonly used in gas-fired and oil-fired forced air furnaces, HVAC heating systems, and warm air units to control the blower fan and provide high-temperature safety protection.
Specifications: Adjustable temperature range, 3-inch insertion depth, thermally actuated, designed for high-limit and fan control applications.