From what I can tell, the dishwasher is filling with water but the sprayers (top and bottom) are not working. I have taken these out to see if they were clogged up but found to be fine. From what I can tell the dishwasher is going thru its cycle (draining, soap dispenser,heat dry etc..) I have also pulled the bottom part out and the impeller looks to be in good shape, but I have no idea how to tell if it in fact is working.