One of the most typical reasons your dishwasher refuses to drain correctly is due to a obstruction in the drain line. This drain line, or drain hose, sends water out of the dishwasher tub after a cycle is completed. If the drain line is obstructed, water won’t flow out of the tub. Reach the Service Experts Heating & Air Conditioning pros at 407-329-7661 for plumbing services in Orlando.