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The genuine Goodman B1392139 View Port Bushing is a factory OEM grommet/bushing that frames and seals the burner sight (view) port on the Goodman ACVC90905DXAB condensing furnace. The view port lets a technician confirm a clean blue burner flame, while the bushing maintains a tight seal in the burner compartment so combustion air and flue draft stay correct. A cracked or missing bushing can disturb the burner box seal and obscure the flame view.
The OEM bushing is molded to the exact port bore and rated for burner-compartment heat, keeping the sight port sealed and clear. Generic grommets may not match the bore or withstand the temperature, leading to a poor seal. OEM ensures correct fit and a safe burner inspection window.
Very Easy (1/5). Pop out the old bushing and press the new one into the port opening by hand. No tools required — under 2 minutes.