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The Goodman B1392139 View Port Bushing is a genuine OEM grommet that frames and seals the burner observation (sight) port on the Goodman ACSS961005CNAA furnace. The viewport lets a technician observe flame quality and ignition during service, and the bushing keeps the opening sealed against air leaks that could affect combustion and pressure-switch readings.
The OEM B1392139 is molded to the exact viewport diameter and rated for the temperatures near the burner assembly. Substitute grommets may not seal fully or may degrade with heat, allowing air infiltration. OEM keeps the combustion area properly sealed.
Very Easy (1/5) — Press the bushing into the port opening by hand. No tools required. Always shut off power and gas before opening the burner compartment.