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The Goodman 20171701 condensate drain trap is a genuine OEM part for the WGFD293070V4CAA high-efficiency gas furnace. The trap collects and channels acidic condensate away from the secondary heat exchanger and inducer while maintaining a water seal that blocks flue gases from escaping into the drain line. A cracked, clogged, or missing trap is a leading cause of pressure-switch faults, water leaks, and lockout codes on condensing furnaces.
The trap's port configuration and internal water-seal geometry are specific to the WGFD drainage layout. Generic traps often use different fittings that leak or fail to hold the seal, triggering pressure-switch errors. The OEM 20171701 connects directly to the factory hoses for a clean, code-correct fit.
Moderate (3/5). Involves disconnecting several condensate hoses, clearing the port, and priming the trap with water before restart. Turn off power and gas first and inspect all hose connections for leaks. Recommended for experienced DIYers or a licensed HVAC technician.