Supco SHM180 Furnace Limit Switch Thermostat with Manual Reset, 180°F

The Supco SHM180 is a snap-disc limit switch thermostat designed for use in gas and oil furnaces, providing critical overheat protection with a 180°F cutout temperature. This safety control automatically shuts off the furnace burner when excessive temperatures are detected, helping prevent equipment damage and potential fire hazards.

Key Features:

• 180°F fixed cutout temperature for reliable overheat protection
• Manual reset operation ensures the issue is addressed before system restart
• Snap-disc bimetal design for precise temperature sensing
• Direct replacement for OEM furnace limit switches
• Suitable for residential and light commercial HVAC applications
• Compact design for easy installation in tight furnace plenums

This limit switch thermostat mounts directly to the furnace plenum or heat exchanger and must be manually reset after tripping, ensuring that a technician or homeowner investigates the cause of the overheat condition before returning the system to service. The SHM180 is an essential safety component for maintaining safe and efficient furnace operation.