Zanussi De6850 goes straight to end of program when turned on. Will not start a cycle or let water in to wash.

SOURCE: Zanussi Dishwasher DE6850

Sounds like a heater problem to me, does it go through the complete cycle on its own?

SOURCE: Whirlpool ADP951 Dishwasher

Processor board sound bad. May be a loose plug ( or corroded connection on the plug ) . Unplug the dish washer from the wall plug before servicing. The open the front panel to expose the panel control board. Unplug the panel plugs and inspect them to assure no corrotion is apparent. If you see corrotion, use a pencil erracer to clean all contact points on the board and clean the plug the best possible. Plug the dishwasher plug back in the wall and check the unit for proper operation. If the operation is not correct, replace the circuit board. I hope this helps
Ed
NC Electronic
Mills, Wyoming

SOURCE: How to replace heating elemant on Zanussi DE6850 Dishwasher

is your water heater set on 120 degres