Here are your parts
Replacement parts for WHIRLPOOL KUDI24SEWH2 | AppliancePartsPros.com

Here is the tech sheet
http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%209743409.pdf

Remove the kick plate and check that the overflow switch is activated. Sometimes dirt etc. can hold it's float in the up position so the unit thinks it is already full of water.

Check for 120 volts across the fill valve when the unit should be filling.
If the voltage is there either:
1. The valve is shot.
2. The filter screen on the input side of the valve is clogged. Remove the valve from the machine and check/clean the screen. Do not permanently remove the screen as it is there to keep crud out of the valve which could hold it open and cause a flood.

Check for 120 volts across the valve/overfill switch combo.
If there is voltage then perhaps the switch is toast.
If there is no voltage it could be a bad control board or a bad wire from the board.