While you wait for answers, we may have found some information which could help you.
Click here for Dwf40 Prewash WashHow to install new knob for smeg dishwasher Type 10028; mod:?
Clear E1 error code on smeg dishwasher with no water or leak?
Hotpoint Aquarius FDW20 diswasher?
Water won’t pump out?
Why is my SMEG Dishwasher showing E1 without water in tray?
How to switch on beep on BEKO dishwasher?