I have replaced the water valve unit that the hoses attach to and I have replace the pressure switch.
Once I replaced those I unplugged the unit for about 30 seconds and tested the machine and after it fills with water it still stops and flashes the f-20 code.
So I am at a loss at what to do next short of purchasing a new washer.
This unit is maybe 5 years old.
Thank you for any help you guys can provide.