Whirlpool Duet Washer Error F/H

Dishwasher Repair
1

I’m getting this error after the cycle runs for 7 min, and fills. Seems like it’s filling or the 10.5gals is flowing past the valve.
I’ve replaced the flow valve, that didn’t help. Now I’m at replacing the Pressure Switch or the CCU. I know the pump works and there is nothing blocking the flow, all that has been check.
How do I test the pressure switch? Or does this sound like a CCU issue?
Thanks for the help.

2

You can find the complete instructions in the Service manual.

Here are the break down diagrams for the Whirlpool Duet washer Model GHW9100LW1

Gene.