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The Goodman B1392139 View Port Bushing is a genuine OEM sealing fitting for the sight/observation port on DMP075-32AA gas furnaces. This small but essential component seals the viewing opening used to inspect the burner flame, preventing air leakage that can disrupt combustion and pressure-switch operation.
The OEM bushing is molded to the exact port diameter and temperature rating of the burner compartment. Generic grommets may not seal fully or may degrade near combustion heat, leading to nuisance pressure-switch faults. For such a low-cost part, OEM is the obvious choice.
Easy (1/5). A simple press-fit replacement. Cut power, remove the burner-compartment panel, pop out the old bushing, and seat the new one. No tools typically required.
Genuine Goodman part. An inexpensive way to restore a proper combustion-chamber seal.