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The Goodman 20171701 is a genuine OEM condensate drain trap built for the AKSS920453BXAA high-efficiency (condensing) gas furnace and compatible Goodman/Amana models. In a 90%+ AFUE furnace, combustion produces acidic condensate that must drain away safely; the trap maintains a water seal that lets condensate flow out while blocking flue gases from being pulled back through the drain. A cracked, clogged, or missing trap triggers pressure-switch faults, water leaks, and lockout no-heat conditions.
The OEM 20171701 matches the exact port spacing, inlet/outlet configuration, and seal depth Goodman engineered for this furnace's drainage and pressure-switch logic. Universal traps often require adapters and can create the wrong seal height, leading to intermittent pressure-switch faults. The genuine part drops in without modification.
Easy — The trap connects to existing drain tubing and mounts in the furnace cabinet. Prime it with water on install, confirm all tubing connections are secure, and verify free drainage. A capable DIYer can complete this in under an hour.