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The Goodman 0128F00006 is a genuine OEM chimney transition bottom for the WGFD28090V5CXAA gas furnace and compatible Goodman/Amana units. This flue component forms the sealed transition between the furnace flue collar and the venting system, directing combustion byproducts safely out of the appliance.
Flue transitions must match the furnace collar dimensions exactly to maintain a sealed, leak-free vent path. Generic or fabricated parts risk gaps that allow flue-gas leakage — a carbon monoxide hazard. This OEM transition guarantees a factory-correct fit and proper draft.
Moderate — Power down the furnace, remove the existing transition and any fasteners or sealant, and fit the replacement to the flue collar. Reseal per code and verify proper draft. Because this is a combustion-venting part, professional installation and a CO check after service are recommended.