Williams P323664 Vent Safety Switch 250°F Manual Reset

The Williams P323664 is a vent safety switch designed for Williams Comfort Products gas furnaces. This manual reset safety device operates at 250°F to monitor vent temperature levels and automatically shuts down system operation when temperatures reach unsafe ranges, protecting your heating system from dangerous overheating conditions.

Key Features:

• Normally closed design that automatically opens when exhaust temperature reaches 250°F (approximately 121°C)
• Manual reset mechanism requires manual operation to restore function after troubleshooting, preventing automatic restarts and improving system control safety
• Protects heating systems by preventing excessive heat from accumulating in venting areas
• Made of high-temperature resistant materials that resist aging and deformation, operating stably in high-frequency, high-temperature environments
• Designed for Williams Comfort Products gas furnaces using natural gas (NG) or liquefied propane (LP)

Replaces OEM Part Numbers: 5001521A, 5001522A, 6501521A, 650122A

This is a critical safety component that helps prevent carbon monoxide hazards and equipment damage by monitoring your furnace's ventilation system. The manual reset feature ensures that the underlying cause of overheating is addressed before the system can be restarted. Professional installation by a qualified HVAC technician is recommended.