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The Goodman 10254303 is a genuine OEM rubber coupling / seal designed for the Goodman GCV91155DXBB high-efficiency gas furnace. On condensing furnaces, flexible rubber couplings join sections of the condensate drain and inducer/vent path, providing a leak-tight, vibration-dampening connection between rigid components. Over time, factory rubber can harden, crack, or take a set, leading to slow condensate leaks, water pooling, or air/pressure leaks that trip the pressure switch. Replacing this small part restores a proper seal and keeps the furnace draining and venting correctly.
This genuine Goodman OEM coupling is molded to the exact diameter and durometer specified for this furnace, ensuring a proper friction fit and long service life. Generic rubber connectors are often close-but-not-exact in size, which can allow slow leaks or slip off under thermal cycling.
Very easy — 1/5. Typically a slip-fit part secured with a spring or worm-gear clamp. Power down the furnace, remove the old coupling, clean the mating surfaces, and press the new one into place. A few minutes of work with basic hand tools. Verify no leaks on the first heating/condensing cycle.