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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue-vent component for the AMH81005CXBA furnace and compatible Goodman/Amana models. This transition piece adapts the furnace's flue outlet to the vent connector/chimney, channeling combustion byproducts safely out of the cabinet. A corroded, warped, or ill-fitting transition can leak flue gases or cause poor draft, so a proper OEM-fit replacement is essential when servicing the venting system.
The OEM 0128F00006 is formed to the precise flue-collar dimensions and mounting-hole pattern of your furnace, ensuring a tight, code-compliant vent seal. Generic or field-fabricated transitions often leave gaps that leak flue products or restrict draft. For a component tied to combustion venting safety, install genuine OEM.
Moderate (3/5). Requires shutting down the furnace, disconnecting the vent connector, removing the old transition, and sealing the new one with high-temp fasteners. Roughly 20–30 minutes. After installation, verify proper draft and check for flue-gas leaks with a combustion analyzer or match/smoke test.