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The Goodman 20171701 is a genuine OEM condensate drain trap for the GCH950904CXAE high-efficiency (condensing) gas furnace. It collects acidic condensate from the secondary heat exchanger and inducer, maintains a water seal that prevents flue gases from escaping, and routes moisture safely to the drain. A cracked or clogged trap is a leading cause of pressure-switch lockouts, water leaks, and no-heat calls on 90%+ furnaces.
The OEM 20171701 has the exact port layout, float/seal geometry, and fittings this furnace's drain and pressure-switch tubing require. Generic traps frequently mismatch port sizes or hold the wrong water column, causing pressure-switch faults that are frustrating to chase. For condensate management on condensing furnaces, OEM fit is worth it.
Moderate (3/5). Requires disconnecting condensate lines and pressure-switch tubing, then re-seating clamps in the correct orientation. Shut off power and gas, prime the trap with water before startup, and verify no leaks. Label tubing before removal so it reconnects correctly.