543-508

This 11-1/2 inch adjustable fan and limit switch is a critical safety and operational component for forced-air heating systems. Designed to monitor the air temperature within the furnace plenum, this control switch automatically regulates the blower fan cycle to ensure efficient heat distribution throughout the home. It features a vital high-limit safety cut-out that prevents the heating system from overheating, protecting your equipment from potential damage. With its adjustable settings, users can precisely calibrate the fan-on and fan-off temperatures to optimize energy efficiency and indoor comfort. Whether you are repairing a residential furnace or maintaining a commercial HVAC unit, this heavy-duty bimetal probe switch provides reliable, long-lasting performance as a replacement for faulty or worn-out temperature controllers.
Type: High Limit Control Switch
Size: 11-1/2 inch probe length
Dimensions: 11.5 inches
Application: Used in gas, oil, or electric forced-air furnaces and HVAC systems to control blower fan operation and provide safety high-limit protection.
Specifications: Adjustable fan-on and fan-off temperature settings; features a manual-automatic switch for the blower fan; bimetal sensing element for accurate temperature detection; includes high-limit safety shut-off.