I have a Whirlpool Dishwasher (Mo: #DU1055XTSB2) that won't start. When I start it, it will fill but then starts buzzing and won't go into a cycle. It will cancel/drain though.
I have tried 2 different wash modes, checked breakers, and tried letting it sit for a while before trying again.
Any assistance will be greatly appreciated!

You probably have a bad or hanging float switch. Check first to see that it moves freely. You will have to check the different switches and safeties with an ohm meter with the power turned off. Here are some manuals:
https://dl.dropboxusercontent.com/u/8010163/whirlpool_dishwasher.pdf
https://dl.dropboxusercontent.com/u/8010163/Whirlpool_Kenmore%20Dishwashers.zip
https://dl.dropboxusercontent.com/u/8010163/How%20to%20use%20Test%20Equipment%20Service%20Manu al.pdf