021-866

This Secondary High-Limit Safety Switch is a critical protective component designed for HVAC systems and gas-fired furnaces. Functioning as a thermal safeguard, this fan disc-style control monitors the internal temperature of your heating equipment. If the unit exceeds its safe operating temperature threshold, the switch automatically interrupts the electrical circuit to prevent overheating, equipment damage, and potential fire hazards. This high-limit control is an essential replacement part for maintaining the safety and efficiency of residential or commercial heating units, ensuring that the system shuts down safely in the event of a blower failure or restricted airflow.
Type: High Limit Control Switch
Size: Small
Application: Used in HVAC systems, gas furnaces, and air handlers as a secondary thermal safety cutout to prevent overheating.
Specifications: Fan disc design; normally closed electrical contact; opens on temperature rise to interrupt power; snap-action thermal sensing.