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The Goodman 0128F00006 is a genuine OEM chimney transition bottom for the AMVC80604BNAA 80% AFUE gas furnace. This sheet-metal transition connects the furnace flue collar to the venting system, shaping the exhaust path for correct draft and safe flue-gas evacuation. Replacing a corroded or misfitting transition prevents flue-gas spillage and helps the induced-draft system pull properly.
Vent transitions are dimensionally precise — the OEM piece matches the furnace's flue collar diameter and bolt pattern exactly, ensuring a sealed, code-compliant connection. Generic or hand-fabricated transitions risk leaks at the seams and improper draft, a carbon-monoxide safety concern. OEM is the safe, drop-in choice.
Difficulty: Easy (2/5). Power off, disconnect the existing vent connector, remove the old transition, seat the replacement on the flue collar, fasten, and seal with approved high-temp material. Verify proper draft with a combustion analyzer. Typical time: 20–30 minutes. Professional venting inspection recommended.