Call kitchen aid or sears if you bought it there some of these units have bad hoses and clamps underneath causing intermitant leaks ask if this unit has a recall on the sump parts.
I changed the hose and the clamps and it was ok for four days then I got water in the bottom of the dishwasher, and I get the water out by running the (rinse only) cycle and that drains it out . Maybe it’s the board ?
Mickcap