Williams P321826 Limit Switch use a manometer to verify

use a manometer to verify the vacuum is greater than

Built with a rugged

Common causes include a restricted flue pipe

this is the current manufacturer-designated replacement

Williams P321826 Limit Switch use a manometer to verifyThe 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