[Notes I found on the web to do with fault code 30.] AEG Favorit 40850 i30 error - this is the anti-flood error. I did the tipping-over trick, great, but for me, the problem got more and more frequent until the machine would not run. So I took it apart and this is what I found: in the drainage area, next to the water drain, is a sensor. This has been described to me by a dealer as a 'temperature sensor'. I am not sure if this controls the anti-flood system, it may well do, as it is the only one in there. However, the problem is not caused by the sensor itself - around the sensor is a black rubber grommet (seal). In my machine (4 years old) this was badly perished - the rubber had become soft and oily, and about half of it had gone. The sensor itself was covered in oily goo from the grommet. I think that bits of the grommet have been coming off and jamming in the drain, and maybe causing the sensor itself not to work properly. I changed the grommet (£5 part), and it all works great. If you want to do this yourself, follow these instructions: turn off power and uplug dishwasher you need a screwdriver with torx bits put lots of old towels on the floor remove top panel using 2 screws at rear top, then push top backwards and lift off remove front base fascia panel by sliding to left remove right side panel - undo 2 screws at top, one at rear bottom, one at front bottom front edge of side panel is wedged inside white trim - just ease it out, it isn't held in. open dishwasher door and push down fully remove curved front base panel - undo screws right up at the top of the panel, this is a tight fit against the door but you can get in if the door is pushed down fully tip dishwasher over onto left side follow the drain pipe in, this takes you to the drain pump if you want to check the drain pump and pipe, twist the whole pump motor assembly to the left about 15mm - there are 3 tabs that hold it in place, you need to rotate the motor past the tabs, then you can pull it out DO NOT remove the spring clips on the large drain pipe (50mm diameter) between the pump motor and the dishwasher drain - these are very difficult to get back on properly, and once you have taken the pump motor off you can feel right through to the dishwasher drain hole anyway. you can take the spring clip off the white oultet hose if you want - this goes back on easily. Check the outlet pipe with a long drain-clearing spring or similar. about 50mm further towards the front of the machine from the drain hose, going around the drain assembly, is the sensor described above this has wires going into into it, is about 25mm diameter, and you will see the black rubber grommet around it this is held in place with 2 plastic clips, ease these back and pull it out. TAKE CARE not to break these clips. If the grommet is heavily worn or perished, you need a new one. The part number is written on the surface of the grommet. reassemble in reverse order. Before you put the panels back on, and with the power still OFF, tip the dishwasher back upright again, open the door, and pour 1 litre of water in (this will end up on your kitchen floor, so don't put too much in). Check carefully under the machine, with a torch, around the areas where you have been working - the sensor and the drain pipes - to make sure there are no leaks. If it all seems OK, dry the floor, turn the power on and run the dishwasher. MAKE SURE you are standing on dry floor when you do this. Check under the dishwasher again for leaks. Let the dishwasher run a complete cycle. Check for leaks when it is pumping out. If everything seems OK, turn the power off again, put the panels back on, then turn the power back on. Good Luck!