I moved into a house with a Bosch dishwasher model SHE4AM12UC. Sometimes it starts right up and washes the dishes and other times I can't get it to start. I have checked to make sure the door is closed tightly, the power button is on, the electricity is on, and the "delay" buttons have not been pushed. Please give me some more suggestions on how to get it to start. Thanks - jebrunner@yahoo.com