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The Goodman B1392139 is the view (sight) port bushing for the GDH80403ANBC gas furnace and compatible Goodman/Amana models. It lines the observation opening in the burner compartment or blower door, providing a clean, heat-resistant edge that protects the panel and lets a technician safely observe the burner flame during operation.
The OEM Goodman bushing is sized to the factory port diameter for a snug, rattle-free fit and proper heat tolerance. Generic grommets may be the wrong diameter or degrade near combustion heat. OEM ensures a lasting, correct fit.
Press into the port opening by hand in about 5 minutes. No tools required. Shut off power and gas before opening the cabinet.