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The Goodman B1392139 View Port Bushing is a genuine OEM grommet that frames and seals the inspection/sight port on Goodman ADVC80703BXAA furnaces. It lets technicians observe the burner flame and ignition through the port while sealing the opening against air leaks and combustion-chamber pressure loss. A cracked or missing bushing allows drafts that can affect flame stability and pressure-switch readings — this inexpensive direct-fit part restores a clean, sealed viewport.
The OEM Goodman bushing is molded to the exact port diameter and rated for the temperatures near the combustion area. Generic grommets may not seal fully or may degrade in heat. For a proper seal and correct fit, choose OEM.
Difficulty: Easy (⚙). Press the old bushing out and snap the new one into the port opening — no tools required in most cases. Disconnect power before service and confirm the port is fully seated.