What causes standing water in the dishwasher?

A clogged drain is the most common cause of standing water in a dishwasher. Users should ensure the drain is free of food and other debris.

If the home has a garbage disposal, users should ensure it is altered to drain the dishwasher properly. Garbage disposals come with a drain plug that needs to be removed in order for the dishwasher to work effectively. The plug blocks the hole to which the dishwasher hose should be connected. Another cause of a dishwasher failing to drain is a stuck drain valve. Users should ensure the valve is in the open position at all times.