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The Goodman 20201802 is a genuine OEM condensate drain hose/tube for the WFD195090S4CAA high-efficiency gas furnace. It routes acidic combustion condensate between the collector box, drain trap, and outlet with a molded shape that clears internal components and maintains proper drainage slope. Over time these hoses harden, crack, or clog with sediment — causing water leaks and pressure-switch faults that shut the furnace down.
The OEM 20201802 is pre-formed to the exact bend, length, and barb diameter of your furnace's drainage path. Generic bulk tubing can kink, sag, or trap water, leading to intermittent lockouts. The molded genuine hose installs cleanly and preserves the factory drainage geometry.
Easy — slip the old hose off the barb fittings and press the replacement into place, confirming it isn't kinked or pinched. A quick DIY-friendly repair; power the furnace down and verify no leaks at restart.