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The Goodman 0128F00006 is a genuine OEM chimney transition bottom for ACVC800803BXAA gas furnaces and compatible models. This flue/vent component channels combustion gases from the furnace collector into the vent connector, maintaining proper draft and a sealed flue path. A corroded or warped transition can leak flue gases or disrupt draft, so a correct-fit replacement is essential to safe venting.
The genuine Goodman OEM transition is stamped to match this furnace's collector box and vent dimensions exactly, ensuring a leak-free seal. Generic or fabricated parts rarely match the flange pattern and may compromise the venting seal. OEM is the recommended choice for any flue component.
Moderate (3/5). About 30–45 minutes for a qualified technician. Power down, disconnect the vent connector, remove fasteners, install the replacement with new gasket/sealant as required, and perform a combustion/draft check before returning to service.