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The Goodman B1392139 View Port Bushing is a genuine OEM sight-glass grommet used on the burner-compartment door of Amana/Goodman AMH80905CNAA gas furnaces. This small rubber/plastic bushing seals the observation port so technicians can safely view the burner flame during startup while maintaining the cabinet's airtight combustion-air seal.
The OEM Goodman bushing is molded to the exact port diameter and temperature rating for a leak-free press fit. A generic equivalent provides a compatible-size aftermarket grommet at the lowest cost when an exact-match seal is not critical.
A missing or cracked view port bushing can allow air leakage that disrupts combustion-air balance and lets the flame draw improperly. Replacing this inexpensive part restores a proper seal and keeps the burner viewing window intact.
Very Easy (1/5) — Press the old bushing out and snap the new one into the door opening by hand. No tools or wiring required. Under 5 minutes.