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The Goodman 10254303 Rubber Coupling is a genuine OEM sealing component used on the AMH950453BXAF high-efficiency gas furnace. This flexible coupling joins condensate drain and pressure-switch tubing sections, providing an airtight, leak-free connection that keeps the furnace's negative-pressure and drainage circuits working correctly. A dried, cracked, or missing coupling is a common cause of pressure-switch faults, water leaks, and short-cycling on 90%+ AFUE condensing furnaces.
The OEM coupling is molded to the exact inner diameter and durometer of the original, so it slides on snugly and holds a seal through repeated heat cycles. Generic hose sections can be the wrong bore or a harder rubber that won't seat properly, leading to slow leaks and hard-to-diagnose pressure-switch trips. At this price, buying the correct OEM part is a no-brainer.
Very easy (1/5). This is a 5-minute repair — power down the furnace, pull the old coupling off both tubing stubs, and press the new one on. No tools required. It's smart to keep a spare on hand, as this inexpensive part often fails long before the components it connects.