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The Goodman 20171701 is the OEM condensate drain trap for the GMV950905DXBA 95% AFUE variable-speed condensing furnace. In a high-efficiency furnace the secondary heat exchanger produces acidic condensate that must drain away freely; this trap maintains the water seal that keeps combustion pressure inside the furnace while letting condensate flow out. A cracked, clogged, or missing trap is a leading cause of water on the floor and nuisance pressure-switch lockouts.
OEM vs. Generic: The genuine 20171701 matches the exact port spacing, hose diameters, and seal geometry of your furnace's drain system. Generic traps frequently require adapters and can leak air at the seal, which in turn trips the pressure switch. The OEM part is the drop-in, no-guesswork option; a generic alternative is available where fitment has been confirmed.
Install difficulty: Easy (2 of 5). Power down, place a towel to catch residual water, disconnect the condensate hoses, swap the trap, and reconnect. Flush the new trap with water and confirm free drainage. About 15 minutes for most DIYers.
Genuine Goodman replacement part. Confirm your furnace model before ordering.