presume you want to get at the pump impeller blades? open up dishwasher, turn and lift out filter in the bottom, then lift out the mesh plate. Down in the bottom left you will see a torx (t20) screw, undo it and lift out the plastic piece that covers the pump impellor. You should be able to remove anything that is clogging the blades, like mozzarella cheese in my case! hope that helps.
Chris, March 2011