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The Goodman 10254303 is a genuine OEM rubber coupling designed for the GCH91155DXAA high-efficiency gas furnace. In condensing furnaces, flexible rubber couplings join drain, condensate, and pressure-tubing connections, absorbing vibration while maintaining a leak-tight seal against acidic condensate. Over time the original coupling can harden, crack, or slip, causing condensate leaks, water-safety-switch trips, or nuisance lockouts. Replacing it with the exact OEM part restores a reliable, watertight connection.
The OEM 10254303 is molded to the precise inner diameter and wall thickness required for a snug, sealed fit on this furnace. Generic couplings that are close but not exact can weep condensate or blow off under pressure, leading to water damage and repeat service calls. The genuine part removes the guesswork.
Very Easy (1/5). Under 10 minutes. Power down the furnace, loosen or cut the existing clamps, slide off the old coupling, seat the new one, and re-clamp. Check for leaks by running the furnace through a heating cycle. No special tools required.