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The Goodman 20171701 is a genuine OEM condensate drain trap engineered for the WGFM195090S4CAD gas furnace and compatible Goodman/Amana high-efficiency models. In a condensing furnace the drain trap seals the condensate line against flue-gas escape while allowing acidic condensate to drain freely from the secondary heat exchanger and inducer housing. A cracked, clogged, or aged trap is a leading cause of pressure-switch lockouts and water pooling around the furnace base.
This genuine OEM trap matches the exact port spacing, float geometry, and barb sizing of the original, so it drops in without adapters and preserves the factory pressure-switch signal. Generic universal traps are cheaper but often require re-plumbing and can trip nuisance pressure faults if the internal volume differs. For a reliable, warranty-safe repair we recommend OEM.
Easy (2/5). A DIY-friendly swap: power down the furnace, disconnect the drain hoses, clear any debris, seat the new trap, and reconnect. Typically 15–20 minutes with basic hand tools. Prime the trap with water before restarting.