The overfill protector (in the front right corner of the dishwasher tub) keeps the dishwasher from overfilling. It must be in place for the dishwasher to operate. Check under the float for objects that may keep the protector from moving up or down.
Cleaning
the filter
screen
Clean the filter screen when needed. 1. Unload and slide the bottom rack forward. (Remove bottom rack if necessary to reach filter screen.) 2. Remove collected particles from the screen with your fingers or paper towel. 3. Return the bottom rack to original position.