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The Goodman 10254303 Rubber Coupling is a genuine OEM flexible seal for the ACSH960904CXAA 96% AFUE gas furnace. This molded rubber coupling joins drainage or induced-draft tubing connections, creating an airtight, watertight seal between components. In a condensing furnace, even a small leak at these couplings can cause condensate drips, pressure-switch faults, and combustion-air sensing errors. Over time rubber couplings harden, crack, and lose their seal — making this an inexpensive but important maintenance part.
OEM couplings are molded to the precise inner diameter and durometer needed to seal the ACSH9 tubing without slipping or restricting flow. Generic hose or fuel-line rubber often has the wrong I.D. or degrades faster under furnace heat. At this price point, the OEM part is the clear choice for a lasting seal.
Easy (1/5). A no-tools push-on replacement for most homeowners. Disconnect power, slide off the old coupling, and seat the new one fully on both connections. If you are unsure which tubing run it serves, consult your furnace diagram or a licensed HVAC technician.