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The Goodman 20171701 Condensate Drain Trap is a genuine OEM component for the GKS90704CXAB 90%+ AFUE gas furnace. On high-efficiency furnaces the drain trap collects acidic condensate from the secondary heat exchanger and inducer, providing a water seal that prevents flue gases from escaping into the cabinet. A cracked, clogged, or missing trap leads to water leaks, pressure-switch lockouts, and no-heat conditions.
This trap is molded to match the exact port locations and outlet orientation of the GKS90704CXAB cabinet. Generic or universal traps frequently require adapters, leak at mismatched fittings, and can hold the wrong water column, triggering pressure-switch faults. The OEM trap drops in without modification.
Intermediate. Requires removing the drain hoses, unclipping the old trap, priming the new trap with water, and reconnecting the tubes in the correct sequence. Budget 20–30 minutes and confirm the trap is filled before restarting to avoid a false pressure-switch trip.