Reznor 122990 High Temperature Limit Switch Manual Reset

The Reznor 122990 is a manual reset high temperature limit switch rated at 175°F designed for use in Reznor gas-fired unit heaters. This safety control monitors the temperature of air passing over the heat exchanger and shuts down the heater if the system overheats, protecting the equipment from damage.

Key Features:

• Manual reset operation requires deliberate reset after shutdown
• Opens at 175°F to prevent overheating conditions
• Tan color housing for easy identification
• Direct replacement OEM part for Reznor unit heaters
• Designed for commercial, industrial, and residential heating applications

This limit control is a critical safety component that prevents excessive temperatures in the heating system. Unlike automatic reset switches, the manual reset feature ensures that a technician investigates the cause of overheating before the unit can be restarted, providing an additional layer of safety and system protection.