Bosch diswashers have a pan and a float switch/flood switch in it. Assumed from what I could find out on the net was that a hose could be leaking (mice can often chew a hole in them and we have cats/mice). Also thought it might be a stuck float except that it would work sometimes at beginning of cycle. Turns out sat it worked as some of the water evaporated overnight enough that the switch turned off--but not for long. You have to put the dishwasher out and rotate it so you are facing the left side and remove a metal cover panel, exposing the hose connections, switches etc. There are 3 hoses coming into the float area--long drain hose and a 20" one from the sump to the junction by float, and the fill line. I say water dripping out of the 20" sump hose, took it out, filed with water and discovered two small holes about 3" from the end of hose at sump where it fit into a plastic block to hold it in place. Under some pressure (blow into one end and close the other), the volume of water was substantial. Had to order part which APP had in stock and had it shipped next day FEDEX. It took me about an hour to replace and put it back together--being perhaps overly careful. Has been working great, thankfully! You would be well advised to view a video of removing the dishwasher from the counter, etc. unless you have previous experience. Great service from APP all the way!!!