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The Goodman B1392139 view port bushing is a genuine OEM sealing bushing for the flame-inspection sight port on the ADVC81005CXBA furnace. This small but important fitting frames the view port and maintains the seal that keeps combustion products contained while still allowing a technician to observe the burner flame. A missing, cracked, or brittle bushing can allow air leakage into the combustion area and affect burner performance and safety inspections.
Because this bushing seals a combustion-area opening, exact fit matters. The OEM B1392139 is molded to the correct diameter and material spec to seat firmly and withstand the heat near the burner box. Generic grommets may not match the bore or heat rating and can loosen over time. For a low-cost part in a combustion location, OEM is the sensible choice.
Very Easy (1/5). A 5–10 minute snap-in replacement. Turn off power and gas, remove the burner-compartment door, press the old bushing out, and seat the new one into the port until it locks. No special tools required.