The circulation pump is blocked.
Remove the lower spray arm.
Remove the filter combination.
Pour 1 litre of warm water (max. 75 °C) with 3 to 5 drops of rinse aid into the dishwasher interior.
Leave the solution to work for 5 minutes.
Refit the filter combination.
Refit the lower spray arm.
Ensure that the filter combination lies flat in the base of the wash cabinet.
Start the programme again.
Repeat the process 2 to 3 times.