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The B1392139 is a genuine OEM Goodman view port bushing designed to fit the ADVC81155CXAA furnace and compatible Goodman/Amana gas furnace platforms. This small but essential component secures and seals the sight-glass inspection port on the burner compartment, allowing technicians to safely observe the flame during operation while preventing air leakage that can affect combustion and heat-exchanger integrity.
Genuine OEM Goodman bushings are molded to exact tolerances and rated for the sustained heat near the burner box. Generic substitutes may warp, shrink, or fail to seal, risking flame-observation problems and nuisance service calls. For a part this inexpensive, OEM is the smart choice.
Easy (1/5). A simple press-fit replacement requiring no tools beyond gloves. Always disconnect power and gas before servicing the furnace.