Disconnect the dishwasher from the mains. If the machine stopped mid-cycle there may be hot, soapy water standing in the tub base — have a towel ready.

Open the door and remove the lower basket. Grasp the cylindrical coarse filter at the centre of the tub base and turn it anti-clockwise until it releases, then lift it out. Rinse it under warm running water and scrub all surfaces with a toothbrush to remove trapped food particles and grease.

Lift out the flat fine mesh filter from the recess beneath where the cylindrical filter sat. This filter is responsible for catching the smallest food particles and is the most common source of E22. Rinse it under warm running water and scrub all mesh surfaces thoroughly with a toothbrush.

With both filter components removed, wipe around the inside of the filter housing recess with a damp cloth to remove any debris that has settled in the sump area. Shine a torch into the sump to check for any solid objects such as glass fragments, small bones, or debris that may have passed through.

If you are in a hard water area and E22 has appeared despite regular cleaning, limescale build-up on both the filter mesh and the filter housing seating surface may be causing the restriction. Place both filter components in a bowl of warm water with a dishwasher descaling tablet or a tablespoon of citric acid powder and leave to soak for 20 minutes, then scrub and rinse.

Place the fine mesh filter flat into the recess with the mesh side facing upward. Insert the cylindrical coarse filter into the housing and turn it clockwise until it locks with a click — an incorrectly seated filter will cause an immediate recurrence of E22. Replace the lower basket and run a Quick Wash programme to confirm the fault has cleared.