Yesterday, my dishwasher stopped working properly. I have found that a wash cycle will start with water filling into the tub, but it is then drained at the time that washing/rinsing should start. I have checked the overfill float and it isn't jammed or stuck. Another thread in the forum for another Whirlpool model mentioned something about a "pressure switch" but I didn't know if that would also apply here.

First time dealing with a dishwasher so I appreciate any advice you can provide.