If the dishwasher is overfilling and leaking from the door then the pressure sensor kit needs to be replaced.
This is a very common fault on these as they have had an issue with the pressure sensors so they have made a kit for this. You need to replace the pressure sensor, bracket and hose as it all comes part of the kit.
It also comes with fitting instructions as well.
The part number for it is 4055346060
Replace that kit and im sure this will cure the fault from there. As i said its a very common fault on these dishwashers.
The best place to get it is direct from Electrolux themselves.
Click here for the part
Your very welcome.