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The Goodman B1392139 is a genuine OEM view port bushing (sight-glass grommet) for the AMVC80604BXCA gas furnace and related Goodman/Amana models. It seats in the burner-compartment access panel and provides a heat-resistant, sealed opening so a technician can visually confirm flame ignition and burner operation without pulling the door. A missing or hardened bushing lets combustion air leak and can trigger nuisance flame-sensor or pressure faults.
Universal grommets rarely match the exact bore and flange thickness of the factory port, so they blow out or melt near the heat exchanger. This genuine Goodman OEM bushing is molded to the correct diameter and rated for the burner-box temperature, giving a leak-free seal every time.
Very Easy (1/5) — Power down, pop the old bushing out of the panel, and press the new one into place by hand. No tools required, under 5 minutes.