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The Goodman 20171701 Condensate Drain Trap is a genuine OEM trap assembly for the GME950403BXAB 96% AFUE condensing gas furnace and compatible Goodman/Amana models. In a high-efficiency furnace, acidic condensate forms in the secondary heat exchanger and must drain freely while the trap's water seal blocks flue gases and induced-draft pressure from escaping through the drain. A cracked, clogged, or wrong-fit trap causes water leaks, pressure-switch faults, and nuisance lockouts.
OEM vs. Generic: The OEM 20171701 has the exact port sizes, seal height, and mounting geometry this furnace needs so condensate drains and the pressure switch reads correctly. Generic traps can alter the water-seal depth and trip the low-pressure switch, producing intermittent no-heat calls. For reliable operation, genuine Goodman OEM is the right choice.
Install difficulty: Moderate (2–3 of 5). Power down and shut the gas, disconnect the condensate and vent tubing, remove mounting screws, drain and swap the trap, then reconnect all lines and prime the trap with water before restart. Confirm no leaks and a clear drain path. Basic hand tools required.