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The Goodman 20171701 is a genuine OEM condensate drain trap designed as a direct-fit replacement for the GCH950904CXAD 95% AFUE condensing furnace. In high-efficiency furnaces the secondary heat exchanger produces acidic condensate that must drain away safely — this trap holds a water seal that lets condensate flow out while blocking flue gases from escaping into the cabinet. A cracked, clogged, or algae-fouled trap is one of the most frequent causes of furnace lockouts, pressure-switch faults, and water leaking onto the floor.
The genuine Goodman trap matches the exact port spacing, barb sizes, and internal baffle design your furnace was built around. Generic traps often require adapters that introduce leak points and can disrupt the pressure-switch reference, causing intermittent lockouts. OEM ensures a clean, sealed fit.
Moderate — Power off the furnace, disconnect the inlet and drain hoses, remove the old trap, and prime the new trap with water before reconnecting so the seal is established on first start. Flush any attached tubing while you're in there. A capable DIYer can handle it in 30–45 minutes.