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The dishwasher seems to start okay, and them it stops after it starts leaking big amounts of water. The cancel/stop led flashes 6 times. The manual says many different things that I don’t really know very much how to check, but most of then involve opening it. What would be the best course to take here ?
Your six flashes mean you have a low water level. You will have to determine where the leak is coming from. Could be as simple as a disconnected hose, but someone is going to have to get down there and LOOK.