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this heater is designed for units that fall within the 21
the 8403-047 ensures accurate atmospheric monitoring to prevent equipment short-cycling and maintain strict indoor air quality standards
Operational Safety: Delivers precise upper temperature sensing to the controller
supporting line voltage up to 240V AC
As a direct replacement part for specified Lochinvar Solution and Armor series units
Williams P168400 Burner R-410A this heater is designed forThe 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