Kitchenaid dishwasher (Model KUDS30IBXT1) stops during Normal Wash cycle Cancel/Drain led on.

On Normal Wash (no Heat Dry) cycle, the cycle would stop, no status leds on,
and soap in the bottom of the dishwasher. Any information I found indicated
that the problem could be the water inlet valve or the float switch - more
likely the water inlet valve. So, I ordered a water inlet valve (from you) on 8/1/2013, received and installed it on 8/6/2013. After running the dishwasher with no problem for 4 days, the problem described above occurred again.

I decided to observe the dishwasher going through the Normal Wash cycle. After about 20 minutes the cycle stops, the "Cancel/Drain" led comes on and all other leds turn off. There is a "slight" drip under the Float assembly when the dishwasher is running. Often, but not every time, I can restart the Normal Wash (no Heat Dry) cycle and it will run to completion and the "Clean" led light comes on. Does the "Cancel/Drain" led light coming on indicate that the problem is somewhere in the Float assembly?