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The Goodman 0128F00006 Chimney Transition Bottom is the genuine OEM sheet-metal flue transition used on the Amana/Goodman AMH80803BNBC 80% AFUE gas furnace. It forms the sealed connection between the furnace induced-draft outlet and the vent pipe, directing combustion byproducts safely into the venting system. A properly fitted transition maintains correct draft and prevents flue-gas leakage into the equipment room — a critical safety and code-compliance point.
OEM vs. Generic: Flue transitions are model-specific — flange spacing, hole pattern, and offset are matched to your furnace cabinet. The OEM 0128F00006 bolts up cleanly and seals as designed, while a generic or field-fabricated piece risks gaps, poor draft, and failed inspection.
Install difficulty: Easy (2 of 5). Shut off power and gas, disconnect the vent pipe, remove the old transition, and fasten the replacement with the factory screws and approved sealant/tape. Verify a proper draft after reassembly. Most techs complete this in under 20 minutes.