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The Goodman B1392139 is a genuine OEM view port bushing (sight-glass grommet) designed for the ADVC80603BXBB furnace and related Goodman/Amana models. It seats in the burner compartment access opening, providing a heat-resistant seal around the flame-inspection view port so technicians can verify burner ignition and flame color without disturbing the combustion chamber. A missing or degraded bushing allows air infiltration that can affect flame stability and inspection visibility.
Genuine OEM Goodman ensures the correct outside diameter and heat rating for a snug, safe seal. Off-brand grommets may not tolerate combustion-zone temperatures and can shrink or crack, breaking the seal. This OEM bushing is spec'd for continuous heat exposure.
Very Easy (1/5) — Power down the furnace, press out the old bushing, and snap the new one into the view port opening by hand. No tools required; under 5 minutes.