Lennox 57W75 Rollout Switch 250°F Pink Disc

The Lennox 57W75 is a rollout limit switch designed as a critical safety component for residential and light commercial HVAC systems. This switch monitors the flue and heat exchanger area to detect abnormal flame rollout conditions, automatically shutting down the furnace when excessive temperatures are detected.

Key Features:

• 250°F temperature rating with pink disc indicator for easy identification
• Automatic reset functionality returns to normal operation once temperature drops to safe levels
• Direct replacement for OEM part number R37520B013
• Designed for Lennox furnaces and compatible heating equipment
• Manual reset button ensures technician inspection before system restart

This rollout switch serves as an essential safety device that prevents dangerous combustion gas spillage into living spaces. When the switch trips, it indicates a potential blockage, heat exchanger crack, or improper venting condition that requires immediate professional attention. The 250°F temperature setpoint provides reliable protection while allowing normal furnace operation.