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The Goodman B1392139 view port bushing is a genuine OEM sealing component for the ACES801005CXAA furnace and compatible Goodman/Amana models. It fits the burner-compartment sight-glass opening, providing a clean, heat-resistant grommet that lets technicians visually confirm flame appearance while maintaining the cabinet's air seal. A missing or deteriorated bushing can allow air leakage and combustion-air imbalance that affects burner performance.
Though small, this bushing must match the port diameter and withstand sustained heat near the burner box. The OEM Goodman B1392139 is sized exactly for the factory opening and rated for the temperatures involved, where universal grommets may not seal correctly or may degrade quickly. An inexpensive OEM part keeps the combustion enclosure properly sealed.
Easy (1/5). Press-fit into the port opening — no tools required in most cases. A 5-minute replacement. Allow the furnace to cool and shut off power before handling internal components.