Dishwasher fails to drain; water remains in the tank or sump and E2 is displayed.

Safety first: Disconnect power and ensure the machine has cooled before working near water.

• Clean tank filters: Open the door, remove the stainless steel tank filter and sump strainer. Rinse under running water and remove any food debris, glass, or labels.
• Check drain pump area: Access the sump area and visually inspect the drain pump inlet. Remove any foreign objects blocking the impeller.
• Inspect drain hose: Follow the drain hose from the pump to the standpipe or sink. Straighten any kinks and check for blockages at the connection to the waste system or air break.
• Check air break (if fitted): On some Comenda models, remove the air break cover and clean internal passages of grease and scale.
• Test drain pump: With power disconnected, check that the pump impeller spins freely by hand. If seized or very stiff, the pump likely needs replacement. If you have a multimeter, test the pump coil for continuity.
• Reassemble and test: Refit filters and panels, restore power, and run a drain or short cycle to confirm the error is cleared.

If E2 persists, the drain pump or control board triac may be faulty and should be checked by a technician.