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The Goodman B1392139 view port bushing is the genuine OEM grommet that frames and seals the burner sight/view port on the Amana/Goodman AMVC960403BNBA variable-speed gas furnace. This bushing lets technicians observe the flame for diagnostics while maintaining a proper seal on the sealed-combustion cabinet — a missing or cracked bushing can allow air leaks that disturb combustion and pressure-switch operation.
The OEM bushing is sized to the exact view-port opening for an airtight, heat-resistant seal. Generic grommets may not withstand cabinet temperatures or seal the sealed-combustion enclosure correctly. OEM is the safe, reliable choice for high-efficiency furnaces.
Very Easy (1/5). Press the bushing into the view-port opening until seated. Under 5 minutes, no tools required. Disconnect power before opening the burner compartment.