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The Goodman 20171701 is a genuine OEM condensate drain trap designed for the ACVC90905DXAA high-efficiency condensing gas furnace. In a 90%+ AFUE furnace, the secondary heat exchanger pulls so much heat from the flue gas that water vapor condenses out. This trap collects that acidic condensate, channels it to the drain line, and maintains a water seal that prevents flue gas and pressure leaks from escaping into the cabinet — protecting the inducer and pressure-switch circuit.
The OEM trap matches Goodman's exact port locations, hose diameters, and float/seal geometry, so it drops in without adapters and seals correctly the first time. Generic traps frequently misalign with the inducer and pressure ports, causing leaks and recurring pressure-switch faults. For a clean, leak-free repair, choose OEM.
Moderate (2/5). Disconnect the hoses, swap the trap, and reconnect — about 20–30 minutes. Shut off power and gas, then prime the trap with water before restarting so the seal holds immediately.