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The Goodman 4053501S is a genuine OEM chimney collar (flue vent collar) for the Goodman/Amana AMS80905CXAA 80% gas furnace and compatible models. This collar mounts to the furnace cabinet and provides the sealed, correctly sized connection point between the draft hood/inducer outlet and the vent pipe. A proper collar is essential for safe flue-gas evacuation — a missing, rusted, or ill-fitting collar can leak combustion byproducts or cause draft problems that trip the pressure switch.
The genuine Goodman collar matches the exact outlet diameter and mounting pattern of your furnace, ensuring a tight, code-compliant vent connection. Generic collars may not seal correctly, risking flue-gas leakage and failed draft. For a venting component, OEM fit-and-finish matters for both safety and inspection.
Rated Moderate (2/5). Power down the furnace, disconnect the vent pipe, remove the old collar's fasteners, seat the new collar with proper gasket/sealant, and reconnect the vent. Verify draft and check for spillage at the draft hood after startup. Venting work should be performed by a licensed HVAC professional.