Washer Has F-01 Error Code

I have the dreaded F-01 code on my Whirlpool Duet Sport washer. It will start up in normal wash and fill with water then wash, but when it stops to pump the water out it just goes blank.I thought it was the pump so I replaced it. Didn't fix. I replaced the CCU main control board. Still showing F-01 code. Ran the diagnostic test, went through all the C test then everything goes blank and the door is locked with water still in drum. I have to reach up under the front to pull on the ring to unlock it. Any help would be appreciated. Thanks Tom

via Washer Has F-01 Error Code
by tseibring