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The Goodman B1392139 is a genuine OEM view port bushing (sight-glass grommet) for the AMVC800804CNAA 80,000 BTU gas furnace and compatible Goodman/Amana models. It seats in the burner-compartment access panel, holding the sight glass securely while sealing the opening so you can safely observe the burner flame during operation and diagnostics.
Over time the original bushing can dry out, crack, or fall out, allowing air leaks around the view port and making flame inspection difficult. This factory replacement restores a tight, clean fit.
The OEM B1392139 is molded from high-temperature material sized precisely for the factory panel opening and sight glass. Generic grommets may not tolerate burner-compartment heat or seal correctly. For a safe, factory-tight fit we recommend OEM.
A tool-free, press-in replacement taking under 5 minutes. Turn off power and gas, remove the old bushing, and press the new one into place. No technician required for most homeowners.