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The Goodman B1392139 View Port Bushing is a genuine OEM fitting for the Goodman VMS80804BNAA gas furnace and compatible VMS-series models. This bushing (grommet) seats the burner sight-glass / view port in the furnace cabinet, allowing safe visual inspection of the flame while maintaining a proper seal against the combustion compartment. Though small, a cracked or missing bushing can allow air leakage and affect combustion-area pressures.
Genuine Goodman bushings are molded to the exact port diameter for a snug, sealed press-fit. Generic grommets rarely match the bore precisely and can fall out or fail to seal. Given the low cost, the correct OEM part is always the sensible choice.
Easy. With power off, press the old bushing out and the new one into the view-port opening — a two-minute job requiring no tools. Ideal for DIY replacement during routine furnace maintenance.
Genuine Goodman part — verify your model number to ensure a correct fit.