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The 0128F00006 is a genuine Goodman/Amana chimney transition bottom for the AMH80403ANBA 80% AFUE, 40,000 BTU induced-draft gas furnace and compatible AMH8-series models. This sheet-metal flue-venting component forms the lower transition between the furnace's induced-draft blower outlet and the chimney/vent connector, directing combustion byproducts safely into the venting system. A properly fitted transition maintains draft, prevents flue-gas spillage, and keeps the venting path sealed and code-compliant.
Flue transitions are cut and formed to match the specific outlet dimensions and gasket surfaces of the furnace's draft assembly. The genuine OEM 0128F00006 aligns exactly, so the joint seals cleanly and the induced-draft pressure switch reads correctly. Universal or shop-fabricated substitutes often leak at the seams or distort the venting path, risking flue-gas spillage and pressure-switch faults.
Moderate (3/5). Requires accessing the draft assembly, transferring gaskets/hardware, and verifying a leak-free, properly sealed vent connection. Shut off gas and power before servicing. After installation, confirm correct draft and pressure-switch operation. Because this is a combustion-venting part, have a licensed HVAC technician verify the vent seal if you're unsure.
Order the genuine Goodman 0128F00006 chimney transition bottom for a secure, factory-correct flue connection.