Okay. I've troubleshot to this point. The dishwasher is filling appropriately, but less than 30 seconds after filling the tub, the drain kicks on and sucks all the water out, so of course it can't do anything but sit there and look stupid. Any tips? The solenoid measures correctly, the float vavle is working fine and not stuck, and the pump/drain/sump all are free of gunk.