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The Goodman B1392139 View Port Bushing is a genuine OEM grommet/fitting for the burner inspection (sight) port on the VMES800403AXAA gas furnace. This small bushing seats around the view-port opening, protecting the sheet-metal edge and helping maintain the proper seal at the combustion inspection window. A missing or cracked bushing can allow air leakage around the port and expose a sharp edge during service.
This genuine OEM Goodman bushing is sized to the exact diameter of the VMES800403AXAA view-port cutout. Generic grommets rarely match the opening precisely, resulting in a loose fit or an incomplete seal. Given the very low cost, fitting the correct OEM part is the sensible choice.
Very Easy (1/5). Simply press the old bushing out of the view-port opening and snap the new one into place — no tools or fasteners required. Ensure it seats fully around the edge for a clean, secure fit. A quick, no-hassle replacement any technician or homeowner can handle safely with the power off.