Re: Bosch Dishwasher
Hi Alanj, I had something similar earlier this year. I found it to be the pressure unit on the left hand side of the machine with the side panel removed. You need to remove this unit, strip down, flush out all gunk, ensure the orange float is clean, refit unit and test. If you are not sure this is the fault, remove left side panel and place machine on test and check the water flows through without restriction, if water appears to spill or there is a scale type crudge about the area you know that is the problem. I found once I had cleaned out this unit the problem disappeared. While you are at this area, remove the hose pipe from this unit to the sump of machine and flush through, sometimes crudge builds up in the pipe and this prevents and efficient fill and can be a cause of back fill. Let us know how you get on OK.
Dave