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Professional technicians prioritize this B1370191 thermal switch for its factory-calibrated set points and resistance to thermal fatigue
this is the official replacement part for the older S1-024-25006-705 model
it ensures direct compatibility with Utica and Dunkirk boilers
OEM Compatibility: Guaranteed fit for Trane induced draft blower assembly units
Williams P322055 Vent Safety Switch Professional technicians prioritize this B1370191For 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
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