Thanks for the help so far, Penguin. I went to the customers house and watched the unit fill, etc. It seems to get enough water, although I don't understand how this water system works on the left side. I noticed a slender red plunger which is connected to a switch box on the left side. This plunger never moves up or down at all during the wash...is it supposed to?
I would really appreciate a service manual for this dishwasher, even if you have to PM me with it. Bosch has not done us local servicers any favors by not providing better info on their expensive products, and I have a customer who is growing impatient. I'm trying to keep from having to pull this thing and tear it apart, but it looks like there may not be a choice in the matter after all. I have already sunk a lot into replacing the board, so I am anxious to get this thing back on track.