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The Goodman 20171701 Condensate Drain Trap is a genuine OEM assembly built for the GKS90905DXAB high-efficiency gas furnace and compatible Goodman/Amana models. This trap collects and drains the acidic condensate produced during high-efficiency combustion while sealing against flue-gas backflow, keeping the secondary heat exchanger draining freely and the pressure switches operating correctly.
A cracked, clogged, or brittle drain trap is a leading cause of pressure-switch faults, water leaks, and lockout codes on 90%+ furnaces. Installing a fresh OEM trap clears these faults and restores proper condensate management.
The OEM trap matches the factory port layout and internal geometry, so it seals and drains exactly as designed. Generic traps may not align with the furnace's drain ports or pressure-switch tubing, leading to leaks and repeat faults. For condensate components on a sealed-combustion furnace, OEM is recommended.
Moderate (2/5) — Disconnect the drain hoses and pressure tubing, swap the trap, and prime it with water before restart. Plan for about 20–30 minutes; label the hoses before removal.
Confirm port configuration matches your furnace before ordering.