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The B1392139 is the genuine OEM view port bushing for the Goodman ACVC80805CXBD gas furnace. This molded grommet seats in the burner-compartment inspection opening, framing the sight window so a technician can safely observe the flame and ignition sequence. It also seals the opening to maintain proper combustion-chamber pressure and keep the blower from drawing air through the gap. A brittle or missing bushing can cause nuisance lockouts and combustion-air leaks.
The OEM bushing is molded to the exact diameter and heat rating of the furnace's view-port cutout. Generic grommets often loosen at temperature or fit poorly, breaking the combustion seal. For a clean, leak-free fit, stick with the genuine part.
Easy (1/5). Turn off power and gas, pop the old bushing out, and snap the new one into place — under 10 minutes with no tools. A true DIY-friendly repair.