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The B1392139 is a genuine OEM view port bushing (sight-glass grommet) for the Amana/Goodman AMVC800805CNAA 80% AFUE variable-speed gas furnace. It seals the inspection window on the burner/combustion compartment, letting a technician safely observe the flame while maintaining the door and combustion-chamber seal. A cracked or missing bushing can allow air leakage that disrupts flame sensing and combustion draft, so replace it any time it is damaged during service.
The OEM bushing is molded to the precise port diameter and rated for combustion-compartment temperatures. Generic grommets often fit loosely or degrade under heat, breaking the seal. Given the low cost, OEM is the clear choice for a proper, safe fit.
Very Easy (1/5). Power off the furnace, remove the old bushing from the port, and press the new one into place — no tools required in most cases. A five-minute job typically done during routine burner inspection.
Goodman and Amana share the same OEM parts catalog; B1392139 is a direct fit for the Amana AMVC8 furnace.