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The Goodman B1392139 View Port Bushing is a genuine OEM grommet/fitting for the burner sight-glass inspection port on the ACES800603ANAA gas furnace. It seals the viewing port in the burner compartment, maintaining the correct combustion-air pressure boundary while still allowing visual inspection of the flame.
A genuine OEM bushing is molded to the exact port diameter and high-temperature spec of your furnace, ensuring a snug, heat-resistant seal. Generic grommets may loosen or degrade near the burner, allowing air leaks that affect combustion pressure. For a small but pressure-critical fitting, OEM is the safe choice.
Very Easy (1/5) — With power off, press the old bushing out of the burner-box port and snap the new one into place. No tools required in most cases; install takes under 10 minutes.