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The B1392139 View Port Bushing is the genuine OEM sight-glass bushing for the Goodman/Amana AMS80403AXAB gas furnace and compatible models. This small but important component seals the burner observation port, letting a technician inspect flame and ignition through the panel while keeping the combustion chamber closed to the surrounding cabinet. A missing or degraded bushing allows air infiltration that can disturb the burner flame and combustion-air balance.
The genuine Goodman bushing is molded to the exact port diameter for a snug, heat-stable fit. Generic grommets often loosen or shrink at furnace operating temperatures, breaking the seal. For a pennies-priced part in a combustion area, OEM is a clear choice.
Rating: Very Easy. With power off, press the old bushing out of the view-port opening and snap the new one in. Under 5 minutes, no tools required in most cases.
Genuine OEM Goodman replacement, fitment guaranteed.