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The Goodman 0128F00006 is a genuine OEM chimney transition bottom for the Amana/Goodman AMVC80905CXAB gas furnace. This sheet-metal transition adapts the furnace vent outlet to the flue/chimney connector, directing combustion products safely out of the home while maintaining the correct draft. A rusted, warped, or mismatched transition can leak flue gases and disrupt venting — the factory part restores a proper, sealed connection.
The OEM transition is stamped to the exact dimensions of the AMVC80905CXAB vent outlet, so it seats and seals correctly the first time. Generic vent adapters often require cutting, bending, or extra sealant and may not align with the factory gasket points, increasing the risk of flue-gas leakage. Because this part handles combustion venting, OEM fit is the safest choice.
Easy to Moderate — 2 of 5. Disconnect power, remove the existing transition fasteners, seat the new bottom, and secure with the original screws and approved sealant. Verify a tight flue connection and check for proper draft after startup. Have a professional confirm venting if you are unsure.