The hinged cover design allows for easy maintenance access while the integrated eight-tumbler security lock prevents tampering with temperature settings

and EGH models

Designed to fit standard 48-cubic inch take-apart filter drier shells

its yellow color-coding allows for immediate visual identification during maintenance cycles

Key Benefits Precise Thermal Protection: Factory-calibrated to open at 250°F

Williams P322055 Vent Safety Switch The hinged cover design allowsFor contractors servicing Williams Monterey Counterflow Top Vent Furnaces, the Williams P322055 Vent Safety Switch is the code compliant OEM replacement required to maintain the integral safety loop. This plunger style actuator switch is engineered for high sensitivity monitoring of flue gas temperatures and airflow obstructions. Designed for specific 35,000 BTU Monterey models, including units 3509821 and 3509822, it functions as a critical vent