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The Goodman B1392139 View Port Bushing is a genuine OEM sight-glass grommet engineered for ACVM960604CXBA modulating gas furnaces. This small but essential rubber/plastic bushing seals the inspection port on the combustion chamber housing, allowing safe visual confirmation of the burner flame while preventing air leakage and protecting the surrounding sheet metal from heat and vibration wear.
Over time the original bushing can dry out, crack, or fall out, leading to a poor seal and a nuisance flame-sensing or pressure fault. Replacing it with the exact OEM part restores a clean, factory-tight fit.
This is a genuine OEM Goodman component, dimensionally identical to the part installed at the factory. Generic universal grommets may not seat flush in the stamped port opening and can degrade quickly near the heat exchanger. The OEM bushing guarantees correct diameter, depth, and temperature rating.
Easy (1/5). No tools required in most cases — power down the furnace, remove the old bushing, and press the replacement into the port opening. A typical install takes under five minutes.