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The Goodman 20171701 condensate drain trap is a genuine OEM component for the AMH950704CXAF high-efficiency (90%+) gas furnace. In a condensing furnace, the secondary heat exchanger produces acidic condensate that must be routed safely to a drain. This trap maintains a water seal that prevents flue gases and combustion pressure from escaping through the drain line while still allowing condensate to flow. A cracked or clogged trap causes water leaks, pressure-switch faults, and lockouts.
OEM vs. Generic: The factory trap is molded to match the exact port spacing, inlet/outlet sizing, and orientation of the AMH950704CXAF cabinet. Universal traps often require adapters and can alter the drain slope, leading to standing water and pressure-switch errors. The OEM 20171701 drops in with no modification.
Install difficulty: Moderate (30–45 min). Involves disconnecting condensate tubing, removing the old trap, and reconnecting hoses with clamps. Have a towel ready for residual water. Verify the trap is primed with water before restarting the furnace.