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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component for the Goodman/Amana WFM18070S4BXCB gas furnace. This sheet-metal transition directs combustion byproducts from the furnace vent outlet into the chimney connector, maintaining the correct draft path and clearances. A rusted, warped, or ill-fitting transition can leak flue gases, disrupt draft, and cause the pressure switch or rollout controls to trip — replacing it with the factory part restores a sealed, code-compliant venting connection.
This genuine Goodman OEM transition matches the exact dimensions and flange pattern of the furnace vent outlet. Generic or shop-fabricated adapters often leave gaps that leak flue products or restrict draft. For a venting component, the OEM part ensures a proper, sealed fit.
Easy to Moderate — Requires removing the existing transition, cleaning the mating surfaces, and resealing with high-temperature approved sealant/screws. Verify draft after installation.