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The Goodman B1392139 View Port Bushing is a genuine OEM component designed for the AMVC800804CNAB two-stage variable-speed 80% AFUE gas furnace. This small but essential grommet seals the sight-glass opening on the burner compartment, keeping the combustion area airtight while allowing a technician to safely observe the flame during startup and diagnostics. A cracked or missing bushing lets air infiltrate the burner box, which can cause flame roll-out, nuisance lockouts, and inaccurate flame-sensor readings.
This is a factory Goodman part built to the exact heat rating and dimensional tolerance of the original. Generic universal bushings are often the wrong durometer or bore size and can shrink or fall out under repeated thermal cycling, breaking the combustion seal. Choosing OEM guarantees a leak-free, drop-in fit and preserves your equipment warranty.
A 5-minute press-fit repair. Power down the furnace at the disconnect, remove the old bushing from the port, and seat the new B1392139 until it snaps flush. No tools or specialized skills required, though all combustion-area work should be verified by a licensed HVAC technician.