Dishwasher leaks from door?

I have a Hygena type APL 8222 built-in dushwasher that appears to be filling with too much water as when it starts the cycle it leaks from the bottom corners.
This problem occured before and an MFI repairer came and did something to "clean out" the interior.
I have dismantled most items within including the pump housing etc but it still does it; any ideas?