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If you have no continuity and the temperature is below 155°F
Built with a rugged
this is the current manufacturer-designated replacement
including the 243-8 and 243-12 models
Williams P321826 Limit Switch If you have no continuityThe Williams P321826 Limit Switch is a critical safety component designed specifically for Monterey Counterflow Top Vent Furnaces, including the 250, 350, and 500 series. As a veteran technician knows, maintaining the integrity of the vent safety shutoff system is non negotiable for preventing flue gas spillage and potential carbon monoxide hazards. This replacement vent limit switch is engineered to monitor exhaust temperatures and will break the
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