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The Goodman B1392139 is a genuine OEM view-port bushing (sight-glass grommet) for the ACVC800803BXAA furnace and compatible Goodman/Amana models. It snaps into the inspection port on the burner or combustion cover, providing a clean, finished opening that lets technicians observe burner flame and ignition while helping protect the port edge.
This small part is sized precisely to the port diameter so it seats securely without falling out or distorting. The OEM B1392139 is an inexpensive, exact-fit replacement; generic grommets rarely match the bore and can pop loose or fail to seat against the panel.
Easy (1/5). A simple press/snap-in replacement requiring no tools in most cases. With power and gas off, pop out the old bushing and seat the new one firmly into the view-port opening until it locks in place.