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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component for the AMH81155CXCC gas furnace. This transition piece connects the furnace vent outlet to the chimney or vent piping, forming the bottom section of the flue transition so combustion byproducts are safely and reliably drafted out of the home. A corroded, cracked, or missing transition can cause draft problems, flue-gas spillage, and nuisance pressure-switch faults — this OEM replacement restores a proper, sealed venting path.
As a genuine OEM Goodman part, the 0128F00006 matches the exact dimensions and mounting points of the original transition, ensuring a tight, code-compliant seal. Generic sheet-metal substitutes rarely align with factory flanges, leading to leaks and difficult field fabrication. The OEM component is a true drop-in fit.
Easy–Moderate (2/5). Shut down the furnace, remove the fasteners securing the old transition, seat the replacement, and re-seal per code — typically 20–40 minutes. Confirm proper draft after reassembly. Because it involves flue-gas venting, verify there are no leaks or spillage; when in doubt, use a licensed technician.