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The genuine Goodman 20201901 Condensate Drain Hose Tube routes condensate away from the secondary heat exchanger and drain pan on your GCH91155DXAC high-efficiency gas furnace. When a drain line cracks, clogs, or hardens with age, water can back up into the burner compartment and trip the pressure switch — replacing this tube restores proper drainage and prevents nuisance lockouts.
This is a factory-original Goodman component, molded to the exact length, bend, and barb diameter the furnace was engineered for. Universal aftermarket hose is often the wrong durometer or diameter, leading to leaks at the fittings. The OEM part seats correctly the first time and preserves your warranty and factory drainage geometry.
Easy (1/5). Power down the furnace, disconnect the old tube at each fitting, and press the replacement onto the same barbs. No special tools required. Confirm a clear downhill run to the drain and verify no leaks on the first heating cycle. If unsure, consult a licensed HVAC technician.