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The Goodman B1392139 is a genuine OEM view port bushing (sight-glass grommet) designed for the Goodman GSM060-3 gas furnace and compatible models in the same platform. This small but essential component seals and secures the burner observation port, allowing safe visual inspection of the flame while maintaining the integrity of the combustion chamber. A cracked, missing, or deteriorated bushing can allow air leakage and interfere with proper flame observation.
This is a genuine Goodman OEM part, guaranteeing an exact fit and factory-spec heat resistance. Generic universal grommets may not seal correctly against Goodman's port opening or withstand sustained combustion-chamber temperatures, risking premature failure. For a critical safety-adjacent component, OEM is strongly recommended.
Easy (1/5). The bushing presses into the burner viewing port opening and typically requires no tools. Always shut off gas and electrical power before servicing. If you are unsure, consult a licensed HVAC technician.