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The Goodman B1392139 is an OEM view-port bushing for the AMVC960803BNAA 96% AFUE variable-speed modulating gas furnace. This bushing seats in the burner/flame observation port on the burner compartment door, providing a sealed grommet through which the flame and ignition sequence can be safely observed. It maintains the door's air seal so the pressure switch and combustion draw are unaffected while allowing service technicians a clear sight line to the flame.
The genuine Goodman bushing is molded from heat-rated material sized precisely to the port opening. Generic grommets may not tolerate the burner-area heat or seal the door correctly, which can disturb combustion airflow and trip the pressure switch. The OEM part preserves the factory seal and safety.
Very Easy (1/5) — Press the old bushing out and snap the new one into the port. No tools or wiring. Power down first; under 5 minutes.