Lennox 26G78 185F Auto Limit Switch Disc Type Temperature Control

The Lennox 26G78 is an automatic reset high limit switch designed for residential and commercial HVAC heating systems. This safety control monitors furnace temperatures and automatically shuts down the system if temperatures exceed safe operating levels, protecting equipment from heat-related damage.

Key Specifications:

• Temperature Rating: Opens at 185°F temperature rise
• Switch Type: Disc-style limit control
• Circuit Configuration: Normally closed
• Reset Type: Automatic reset when temperature drops below setpoint
• TOD Switch Series: 61F

What's Included:

• High limit switch (26G7801)
• Mounting machine screw

This genuine Lennox replacement part is also compatible with Allied, Armstrong, Concord, and Ducane heating equipment. Cross-references to OEM part numbers 58H78, 52A94, 58H7801, 52A9401, 26G7801, 322801, and A1514. The normally closed circuit design ensures reliable fail-safe operation in gas and electric furnace applications.