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The Goodman B1392139 View Port Bushing is a genuine OEM replacement grommet that seats and seals the sight-glass window on the combustion door of AMH80805CNAA furnaces. This small rubber bushing keeps the flame-inspection port airtight so the pressure switch reads correctly and the burner flame stays visible during service. A cracked or missing bushing can cause nuisance pressure-switch lockouts and combustion-air leaks, so replacing it restores proper sealed-combustion operation.
This is the genuine Goodman OEM bushing, molded to the exact diameter and durometer of the original so it seals on the first push with no leaks. Generic universal grommets are cheaper but often under- or over-sized, leading to combustion-air leaks and repeat pressure-switch faults. For a sealed-combustion appliance, the OEM part is the safe choice.
Easy (1/5). Power down the furnace, pop the old bushing out of the port, and press the new one into place — no tools required. Typical replacement takes under five minutes. If you are unsure about combustion-chamber components, have a licensed HVAC technician perform the swap.