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The Goodman 0128F00006 chimney transition bottom is a genuine OEM sheet-metal component for the Amana/Goodman AMVC80604BNBC furnace. It forms the lower connection between the furnace's induced-draft/collector box and the vent pipe, channeling flue products into the chimney or vent connector. A properly fitted transition is essential for correct draft, safe evacuation of combustion byproducts, and prevention of flue gas spillage into the equipment space.
Aftermarket transitions rarely match the exact flange pattern and dimensions of the original, forcing gaps, field cutting, or extra sealant that can leak flue gas. This factory Goodman part drops into the AMVC80604BNBC exactly as designed, keeping the vent system tight and the draft correct without modification.
Moderate. Requires powering down the furnace, disconnecting the existing vent transition, and fastening/sealing the new piece with the appropriate high-temp gasket or sealant. Verify a proper draft and check for flue spillage after reassembly. Combustion-venting work is best confirmed by a qualified HVAC technician.