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The Goodman 20171701 Condensate Drain Trap is a genuine OEM part for the GMH950703BXAG 96% AFUE condensing gas furnace. In a high-efficiency furnace, the secondary heat exchanger produces acidic condensate that must drain away while the trap maintains a water seal to prevent flue gases and inducer pressure from escaping the drain line. A cracked, clogged, or missing trap leads to pressure-switch faults, water leaks, and lockouts.
OEM vs. Generic: The OEM trap matches the furnace's exact port sizes, seal height, and anti-siphon design. Generic traps frequently leak or produce false pressure-switch readings. For proper drainage and pressure sensing, the genuine part is recommended.
Install difficulty: Moderate — involves disconnecting drain tubing and inducer/pressure hoses, then priming the trap with water. Straightforward for a technician but easy to reconnect hoses incorrectly.