Check My Diagnosis

Whirlpool Dishwasher: DU811SWKQ0. Won’t fill.

Incoming power good. Inlet valve works with test cord applied. Voltage to valve when any wash cycle chosen is less than 10VAC. I didn’t check the timer contacts, but I suspect the timer is bad.

What do you guys think?

It is common for low current timer contacts to get contaminated. I would spray non-residue contact cleaner on the contacts and turn the timer knob around a few times. At the least, it will confirm the problem, at best fix. Available at Wall Mart. Make sure ther is a plastic spray guard on the timer.