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The Goodman 20171701 is the OEM condensate drain trap for the WFD195045S3BAB high-efficiency (condensing) gas furnace and compatible Goodman/Amana models. In a 90%+ AFUE furnace, combustion produces liquid condensate that must drain away while the trap's water seal blocks flue gases from escaping into the cabinet or living space. A cracked, clogged, or algae-fouled trap causes water leaks, pressure-switch lockouts, and no-heat faults. This genuine replacement restores proper drainage and maintains the required seal.
The OEM trap matches Goodman's exact port geometry and internal seal height, so it connects to the factory hoses without adapters and maintains the correct pressure balance for the collector box and pressure switch. Generic traps frequently leak at the fittings or upset the draft, triggering intermittent pressure-switch faults. OEM is recommended for reliable, code-compliant drainage.
Moderate — DIY-friendly with care. Power down the furnace, disconnect the drain hoses, remove and clean the trap area, then install the new trap and re-secure the hose clamps. Prime the trap with water and check for leaks before returning the unit to service.