020-529

This high-quality Fan Disc High Limit Control Switch is a vital safety component for residential furnace and HVAC systems. Designed as a thermal safeguard, this normally closed (NC) limit switch monitors internal temperatures to prevent the heat exchanger from overheating. When the system temperature reaches the 135°F threshold, the switch automatically opens the electrical circuit, shutting down the burner or heating element to ensure safe operation. Once the unit cools to a safe temperature, the switch resets, allowing your heating system to resume its cycle. This replacement part is ideal for fixing furnace short-cycling or units that have stopped heating due to a failed safety sensor, ensuring your heating equipment remains reliable and efficient throughout the season.
Type: High Limit Control Switch
Size: Standard Fan Disc
Application: Forced-air gas furnaces, heating systems, and HVAC equipment requiring thermal safety monitoring.
Specifications: Open Temperature: 135°F; Reset Type: Automatic; Switch Configuration: Normally Closed (NC); Function: High Limit Safety Cutout.