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The Goodman B1392139 View Port Bushing is a genuine OEM sight-glass grommet designed to fit the ADSH801005CXAA gas furnace and compatible Goodman/Amana models. This small but essential rubber bushing seals the observation port on the burner compartment, letting a technician safely watch the flame while keeping the combustion chamber sealed against air leaks that can trigger nuisance flame-sensor and pressure-switch faults.
OEM vs. Generic: This is the factory Goodman part, molded to the exact port diameter so it seats flush and maintains the furnace's designed combustion seal. Aftermarket grommets often run slightly under- or over-sized, leading to air infiltration or a bushing that pops out during service. For a component this inexpensive, the genuine OEM part is the safe choice.
Installation difficulty: Easy (DIY-friendly). With power off, pop the old bushing out of the burner-box port and press the new one into place by hand — no tools required, typically under two minutes. Always shut off gas and electrical power before servicing any furnace.