Unplug the dishwasher from the mains. If the machine stopped mid-cycle, hot soapy water may be standing in the tub base. Open the door slowly to allow any steam to escape and have a towel ready to absorb water when working at the base of the tub.

Remove the lower basket. Unscrew the cylindrical coarse filter anti-clockwise and lift it out. Lift out the flat fine mesh filter from the recess beneath it. Rinse both thoroughly under warm running water, scrubbing all surfaces with a toothbrush to remove food grease, soap residue, and trapped debris.

With both filters removed, shine a torch into the sump cavity. Look carefully for glass fragments, small bones, fruit stones, bottle caps, or solid debris blocking the drain pump entrance at the base of the sump. Try to rotate the pump impeller gently using a non-metallic implement such as a wooden cocktail stick. It should turn with slight, even resistance.

Pull the dishwasher forward slightly and inspect the drain hose along its full accessible length. Straighten every kink and compressed section. The hose end in the standpipe should be no more than 10 to 12 centimetres deep — inserting it deeper creates a continuous syphon effect that prevents proper drainage. The hose should loop upward to at least 40 centimetres above floor level before descending to the waste connection.

With the machine unplugged, confirm that the drain hose connection at the machine body is fully seated and clamped. A loose or partially pulled-out hose connection reduces the internal hose diameter and can restrict drainage enough to trigger E24.

Refit both filter components firmly, lock the cylindrical filter clockwise until it clicks, and replace the lower basket. Plug in and run a Quick Wash. The drain pump should activate within the first few minutes and water should flow clearly from the drain hose.