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The Goodman 0128F00006 is a genuine OEM chimney transition bottom designed for direct-fit replacement in AMVC80804CNBD gas furnaces. This flue-vent component channels hot combustion gases from the heat exchanger collector box into the vent connector, forming a sealed, code-compliant path to the chimney. A rusted or damaged transition can leak flue gases — replacing it restores a safe, properly drafting venting system.
OEM Goodman transitions match the exact collector-box and vent geometry of your furnace, ensuring a leak-free seal and correct draft. Generic or fabricated parts risk gaps that allow flue-gas spillage — a carbon-monoxide hazard. For venting integrity, OEM is the recommended choice.
Moderate — shut off power, disconnect the vent connector, remove fasteners and old sealant, and install the replacement with proper high-temp sealing. Verify draft and check for spillage after install.