ADG722

Hi all,
been out to an ADG722 Dishwasher that has a continualy flashing start light (no pauses) and puumps out all the time.

Reset the prog but pumps out all time.

Then found base 1/2 full with a mixture of turps & gloss paint!

Cleaned out base and the pressure switch in the sump, which was stuck in.

Tested, OK.

2 hours later got a call, same problem. Went back later, p.switch ok does wash till 1st empty then empties for 5mins then stops. start light flashes.Tried to reset. hold start for 6 secs, light off,pumps out 4 mins, light flashes.

Any ideas as to any further faults I should be looking for.

Thanks, John