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The Goodman 10254303 is a genuine OEM rubber coupling used to join tubing and seal connections inside the AMVC951155DXAA variable-speed condensing furnace and related Goodman/Amana models. In a 95%+ AFUE furnace, flexible rubber couplings connect condensate drain segments, pressure-switch tubing, and inducer/trap fittings, creating an airtight, leak-free seal. A hardened, split, or dried-out coupling causes condensate leaks, false pressure-switch readings, and intermittent no-heat lockouts.
Inside diameter and durometer are matched to the factory tubing so the coupling grips without pinching or slipping. Generic rubber can be too stiff or too soft, leading to slow leaks that are frustrating to diagnose. At this price, genuine OEM is the obvious choice.
Power down, slide the coupling off the old fittings, and press the replacement onto both ends until fully seated. A common wear item worth keeping on the truck — under 5 minutes to replace.