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The Goodman 20171701 Condensate Drain Trap is a genuine OEM replacement for the GMH950704CXAB and related Goodman/Amana high-efficiency (condensing) gas furnaces. In a 90%+ AFUE furnace, the secondary heat exchanger produces acidic condensate that must drain safely away; this trap maintains the water seal that prevents flue gases from escaping while allowing condensate to flow. A cracked, clogged, or brittle trap can cause water leaks, pressure-switch faults, and lockouts.
The OEM Goodman trap is molded to match your furnace's exact port spacing, hose connections, and float/seal design. Generic traps often require adapters and may not seat correctly, risking leaks and pressure-switch errors. Because this trap ties directly into the combustion pressure system, OEM fit is strongly recommended.
Moderate (2/5). Plan 30–45 minutes. Disconnect the condensate hoses, clear any residue, and confirm all connections are leak-free and the trap is primed with water before restarting. Turn off power and gas first.