My 2 year old AEG dishwasher (Favorit 40010 VI) has started to play up. Sometimes at the end of a run it double beeps, I've checked for leaks and cleaned out the filters and run a cleaning cycle with a cleaning tablet but that hasn't helped. Also sometimes in the middle of a run the light on the floor flashes. With both these things, if you open the door then press the program button again and close the door again it completes the run and the dishes always come out clean... What's going on?!