Dishwasher shows E24 and will not drain; water remains in the bottom at end of cycle.

Safety: Turn off power before working on the drain system.

Steps:

• Check drain hose routing: Ensure the hose is not kinked behind the dishwasher and that it rises to the correct height (usually under the countertop) before connecting to the sink drain.
• Inspect sink connection: Remove the hose from the sink trap or garbage disposal and check for blockages. If recently installed, ensure the knockout plug in the disposal inlet was removed.
• Clean filters and sump: Remove filters and check for debris at the drain inlet.
• Check drain pump: Access the pump from the base and inspect for obstructions in the impeller housing.
• Run test cycle: After clearing blockages, run a short cycle to confirm proper draining and that E24 is cleared.