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The Goodman 0128F00006 is the OEM chimney transition bottom panel used in the exhaust/venting assembly of the Amana / Goodman AMH80904BXCB 80% AFUE furnace. This formed sheet-metal transition directs flue products from the heat exchanger collector box into the vent connector, maintaining the correct draft path and sealing the bottom of the transition to prevent flue-gas leakage into the cabinet.
Venting components must fit precisely — gaps or mismatched geometry can disrupt draft and allow combustion gases to escape. This OEM panel matches the factory stampings, screw holes, and gasket surfaces exactly. Universal or fabricated substitutes are not recommended for combustion venting.
Moderate (3/5). Requires removing the furnace vent connector and access panels, then re-sealing with high-temp furnace cement or the original gasket. Because this part is part of the flue path, we strongly recommend installation by a licensed HVAC technician and a post-repair combustion/draft check.