120-623

This high-quality Fan Limit Control is a vital safety and operational component for forced-air heating systems. Designed to regulate the blower motor's activity, it ensures the fan only activates once the furnace heat exchanger has reached a sufficient temperature, preventing the circulation of cold air during the start of a heating cycle. Furthermore, it serves as a critical safety limit switch, automatically shutting down the heating source if internal temperatures exceed safe operating parameters to prevent overheating and potential equipment damage. If your furnace fan is running continuously or failing to turn on, replacing the fan limit switch can restore efficient operation and maintain home comfort.
Type: HVAC Fan Limit Control Switch
Size: Standard HVAC control module
Application: Used primarily in gas or oil-fired furnaces and forced-air heating systems to manage blower motor timing and provide high-temperature safety protection.
Specifications: Temperature-activated mechanical or electrical switch; features adjustable or fixed temperature settings for fan-on, fan-off, and high-limit safety cut-out; designed for furnace plenum mounting.