Whirlpool DW is running but not washing a darn...

Question

My Whirlpool dishwasher model DU810SWPQ0 is only 2 years old and it's already giving me headaches! It runs through a wash cycle like it's doing something but doesn't wash a one dish. When it comes time for the water to run there's this high pitch squeal noise, but no water runs. I've checked the little flow thing and it's clear so is the food catcher. Any suggestions???