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The Goodman B1392139 View Port Bushing is a genuine OEM fitting for the burner sight-glass (view port) opening on the AMEC800804CXAA gas furnace. This bushing/grommet frames and seals the inspection window used to visually confirm burner flame, keeping the combustion compartment properly closed while still allowing a clear view. A missing or cracked bushing can allow air leakage around the port and make flame inspection difficult.
The genuine OEM bushing is molded to the exact port diameter so it snaps in and seals without gaps. Off-size generic grommets can fall out, distort the opening, or fail to seal against combustion-compartment air leaks. For a low-cost part, OEM guarantees a clean, secure fit the first time.
Easy (1 of 5). With power and gas off, press out the old bushing and snap the new one into the port opening — typically no tools required. Confirm it seats fully and the sight glass (if applicable) is retained. This is one of the simplest furnace fittings to replace.