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The Goodman 10254303 Rubber Coupling is a genuine OEM connector/seal used on the Goodman GKS90453BXAF gas furnace and compatible GKS90 series equipment. It joins vent/inducer components while dampening vibration and maintaining an airtight seal, helping the pressure switch read accurate draft and keeping combustion byproducts contained. Over time rubber couplings harden, crack, or leak — replacing with the correct OEM part restores proper draft-proving and quiet operation.
OEM couplings are molded to the exact diameters and durometer needed for a leak-free press fit. Generic hose or couplings often loosen, leak, or degrade quickly under heat, triggering pressure-switch faults. The genuine part ensures a lasting, code-compliant seal.
Very Easy (1/5) — Loosen the clamps, slide off the old coupling, fit the new one, and re-tighten. A 5-minute swap with basic hand tools. Shut off power before servicing.