One of the most common reasons your dishwasher refuses to drain correctly is because of a obstruction in the drain line. This drain line, or drain hose, sends water out of the dishwasher tub at the end of a cycle. If the drain line is clogged, water isn’t able to flow out of the tub. Call the Service Experts Heating & Air Conditioning pros at 540-302-8645 for plumbing services in Roanoke.