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The Goodman B1392139 View Port Bushing is a genuine OEM sealing grommet for the burner sight-glass opening on the AMH81405DNAB gas furnace. This small bushing maintains a proper seal around the inspection port, helping preserve combustion-air integrity and letting technicians safely view the flame during service.
The OEM Goodman B1392139 is molded to the exact port diameter of your furnace for a tight, heat-resistant seal. Off-brand bushings often fit loosely or degrade near the burner box. At this price, genuine OEM is the obvious pick.
Very Easy (1/5). With the burner door removed, press the old bushing out and snap the new one into the port opening — no tools required. Under 5 minutes. A great add-on part to replace while servicing the burners or limits.