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The Goodman 20171701 Condensate Drain Trap is a genuine OEM replacement designed for the Goodman GMH951155DXAA high-efficiency condensing furnace. On a 95% AFUE furnace, cooled flue gases release acidic condensate that must drain away cleanly. This factory trap creates the water seal that carries condensate to the drain while blocking flue gases from being pulled back into the furnace cabinet.
The OEM 20171701 trap matches the exact port spacing, hose barb sizes, and internal geometry of your furnace's drain system. Generic traps frequently require adapters, leak at mismatched fittings, or hold an incorrect water column — leading to pressure-switch faults and error codes. The factory part drops in without modification.
Easy to Moderate (2/5). Replacement involves disconnecting the inlet and outlet hoses, removing the old trap, and priming the new trap with water before reconnecting. Turn off power first and inspect all hoses for cracks while access is open. Plan on 20–30 minutes.
Keep condensate flowing and your GMH951155DXAA running trouble-free with the genuine Goodman 20171701 drain trap.