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The 0128F00006 is a genuine OEM chimney transition bottom designed for the Goodman/Amana AMH80603ANBB gas furnace and compatible 80% AFUE models. This component forms the lower transition between the furnace flue collar and the vent connector, maintaining a sealed, properly aligned exhaust path so combustion gases are safely carried to the chimney. A cracked, corroded, or missing transition can allow flue-gas leakage and disrupt draft, so replacing it with the correct OEM part is essential for safe operation.
This is the genuine Goodman/Amana OEM part, engineered to the exact dimensions and gauge of the original. Generic or universal transitions often require field modification and may not seat cleanly against the flue collar, risking leaks. The OEM 0128F00006 drops in without cutting or adapting.
Easy (1/5). Removal and reinstallation is a straightforward mechanical swap using basic hand tools. Always shut off power and gas before servicing, and verify a proper draft after reassembly. If you are unsure about combustion-venting safety, consult a licensed HVAC technician.