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The Goodman 20171701 Condensate Drain Trap is a genuine OEM replacement for the GKS90703BXAC high-efficiency (condensing) gas furnace and compatible Goodman/Amana models. In a 90%+ AFUE furnace, combustion produces acidic condensate that must drain away safely; the drain trap provides the water seal that lets condensate exit while blocking flue gases from escaping into the cabinet. A cracked, clogged, or brittle trap is a frequent cause of water leaks, pressure-switch faults, and lockout no-heat codes.
This OEM Goodman trap matches the exact port spacing, barb sizing, and water-seal geometry of the original. Generic traps rarely align with the factory drain routing and can leak or trip the pressure switch. For a condensing furnace, the correct OEM trap is strongly recommended.
Difficulty: Moderate (3/5). Power down, disconnect the inlet/outlet drain hoses, remove the old trap, and install the new one — priming it with water to establish the seal. Plan for 20–40 minutes. Confirm no leaks and that the pressure switch reads correctly on start-up.