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The Goodman 20171701 is a factory-original condensate drain trap engineered for the WGFM195090S5CAA 95% AFUE high-efficiency gas furnace. In a condensing furnace the secondary heat exchanger produces acidic condensate that must drain away while the trap holds a water seal to block flue gases and combustion pressure from escaping into the cabinet. A cracked, clogged, or missing trap is one of the most common causes of pressure-switch lockouts and nuisance shutdowns, so replacing it with the correct OEM part restores reliable operation.
This is a genuine Goodman OEM trap with the exact port geometry and inlet/outlet spacing the WGFM195090S5CAA plumbing expects. Generic or universal traps often require adapters, seal poorly, and can throw pressure-switch faults. The OEM part drops in without modification and preserves your furnace warranty.
Easy (1/5). Power down the furnace, disconnect the condensate lines, remove the old trap, and reconnect. Fill the trap with water before restart to establish the seal. No specialized tools required; typical replacement takes 15–20 minutes. If unsure, consult a licensed HVAC technician.