IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component for ADSS800403AXAC gas furnaces and related Goodman/Amana 80% AFUE models. This sheet-metal transition connects the furnace's induced-draft outlet to the vent pipe, maintaining the correct flue geometry so combustion byproducts are drawn safely up the chimney. A crushed, rusted, or mismatched transition can disrupt draft, trip the pressure switch, or leak flue gas.
OEM vs. Generic: Flue transitions are dimension-critical — the collar must match the furnace outlet and vent diameter exactly to preserve proper draft. This OEM Goodman part is stamped to the factory profile, unlike generic sheet-metal fittings that may require cutting or field modification. Choose OEM for a leak-free, code-compliant vent connection.
Install difficulty: Easy to moderate (⭐⭐☆☆☆). Remove sheet-metal screws, detach the old transition, seat the new one, and reseal joints with high-temp foil tape or approved sealant. Verify draft after installation. Suitable for experienced DIYers; combustion venting should be confirmed by a technician.