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The Goodman B1392139 View Port Bushing is a genuine OEM sealing bushing for the flame-observation sight port on the VCES800804BXAA gas furnace. It holds the view port lens in place and seals the opening so the combustion chamber stays airtight while still allowing technicians to observe the burner flame during service.
The OEM B1392139 is molded to the exact port diameter, so it snaps in and seals without leaking combustion air. Substitute grommets that are slightly off-size can fall out or fail to seal, allowing air bypass that affects burner performance. At this price, the correct OEM part is a no-brainer.
This is one of the simplest repairs on the furnace — press the old bushing out, clean the port, and press the new bushing in until it seats fully. No tools are typically required. Cut power and shut off the gas supply before opening the burner compartment.