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The Goodman 0128F00006 is a genuine OEM chimney transition bottom for AMS80805CXAB gas furnaces. This sheet-metal venting component forms the transition between the furnace's induced-draft/flue outlet and the vent connector, ensuring flue gases are captured and directed to the chimney or vent pipe. A properly fitted transition maintains draft and prevents flue-gas spillage — an important part of safe furnace venting on 80% AFUE equipment.
Venting components are dimensioned to the furnace cabinet and flue outlet so seams seal and draft stays within spec. A generic or field-fabricated transition may leave gaps that leak flue gas or disrupt draft. For a combustion-venting part, OEM fit is strongly recommended.
Difficulty: Moderate. Shut off power and gas, disconnect the vent connector, remove fasteners, and swap the transition, resealing all joints per code with approved materials. Typically 20–40 minutes. After installation, verify proper draft and check for spillage at start-up. Because it affects venting safety, licensed HVAC installation is recommended.
Confirm your furnace model number before ordering. Backed by our fast-ship guarantee.