Replacing a failing switch with this genuine 100111120 pressure switch ensures seamless compatibility with Lochinvar boilers and A

Optimized Performance: Specifically engineered for Aaon units to ensure perfect compatibility and 208/230V electrical synchronization

Common causes include low suction pressure (below 55 PSI)

and side-shell holes for Rheem and Trane applications

if voltage is present after the igniter glows but the valve doesn't "click" or release gas

Williams P168400 Burner L99H008 Replacing a failing switch withThe Williams P168400 Burner is a precision engineered OEM replacement part specifically designed for Williams Direct Vent Wall Heaters, primarily supporting the 1403 series such as models 1403821 and 1403822. As a veteran grade burner assembly, it is constructed from high grade stainless steel to provide superior thermal resistance and maintain consistent flame stability in gravity direct vent furnaces. Experienced technicians recognize the P168400