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The Goodman 20171701 is a genuine OEM condensate drain trap for the GMH950905DXAE 95% AFUE condensing gas furnace. High-efficiency furnaces extract latent heat from the flue gases, producing acidic condensate that must drain freely while the trap maintains a water seal against combustion-gas leakage. A cracked or clogged trap causes pressure-switch lockouts, water leaks, and no-heat calls — making this a common and important replacement part.
The trap's port configuration and internal seal height are matched to this furnace's induced-draft pressures. Genuine OEM traps bolt directly to the factory ports and hold the correct water seal. Adapted generic traps often leak air, triggering intermittent pressure-switch faults that are frustrating to diagnose. OEM is strongly recommended.
Moderate — involves disconnecting drain and pressure tubing, removing the old trap, and flushing the lines, typically 30–45 minutes. Power and gas off during service. Prime the new trap with water and verify a leak-free seal before restarting the furnace.