While you wait for answers, we may have found some information which could help you.
Click here for Arm Not TurningHow to fix Kenwood Slimline Dishwasher KDW45X20 with a F1 Er?
How to install new knob for smeg dishwasher Type 10028; mod:?
Simpson Silencio 850 Dishwasher?
Why is dishwasher not fully drained of water?
Water won’t pump out?
Which way up is the upper spray arm - with holes uppermost o?