The circulation pump is blocked. In longer breaks between wash/rinse cycles (lasting weeks or months at a time), the pump may become dry and stick together.
Remove the lower spray arm.
Remove the filter combination.
Pour 1 liter of hot water (maximum 165°F/75°C) with 3 to 5 drops of rinse aid into the dishwasher interior.
Leave the solution to soak for 5 minutes.
Reinstall the filter combination. Ensure that the filter combination is positioned correctly.
Reinstall the lower spray arm.
Restart the program.
Repeat the process 2 to 3 times if necessary.
Consult the operating instructions for further information.