If your dishwasher will not drain or leaves standing water, use this checker to separate common filter, hose, disposal, installation, and pump/control clues. It only recommends safe checks that do not require opening electrical panels or dismantling the drain pump.
Why Dishwashers Leave Standing Water
Manufacturer troubleshooting guidance commonly starts with the user-cleanable filter, visible drain hose, sink or garbage-disposal connection, air gap or high-loop routing, and recent installation changes. If those checks are clear and the dishwasher still does not drain, a pump, valve, wiring, or control issue may require service.
A Small Amount of Water Can Be Normal
Some dishwasher models retain a small amount of water in the filter or sump area between cycles. A shallow amount around the filter is different from a noticeable pool across the bottom or water near the door opening. Check the model manual if you are unsure what is normal for your dishwasher.
If the dishwasher shows an error code, use the Appliance Error Code Lookup. For broader troubleshooting, see common dishwasher problems, the dishwasher repair cost guide, or dishwasher repair service.
Source basis: Safe drain troubleshooting patterns are consistent with current Whirlpool, Samsung, and LG manufacturer support guidance. Exact filter access, hose routing, air-gap requirements, and drain procedures vary by model and installation.