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The 0128F00006 is a genuine Goodman chimney flue transition bottom that adapts the furnace's induced-draft flue outlet to the vent connector on VDS80603AXAA gas furnaces. This formed sheet-metal transition channels combustion byproducts from the heat exchanger into the vent pipe while maintaining the correct draft geometry. A rusted-through, warped, or missing transition leaks flue gases and disrupts draft, which can trigger pressure-switch faults and a safety concern.
The genuine OEM Goodman transition matches the exact flange pattern, outlet diameter, and draft path of the original. Generic or field-fabricated transitions risk flue-gas leakage and improper venting. For any flue-side component, OEM fit is essential to safe, code-compliant venting.
Moderate (2/5). Power down the furnace, disconnect the vent connector, remove the fasteners and factory sealant, and install the new transition with high-temperature sealant. Confirm proper draft and check for spillage at the draft hood after restart. Best handled by an HVAC professional.