Error Code F01

Hi there, After about year and half Whirlpool duet sport gave F01 error code. The technician manual is located under the lower front panel. There are three possible reasons for F0: 1) EEPROM ERROOR. Unplug a washer for two minutes. Try running it again. (Did not work for me). 2) MAIN RELAYS ERROR. The tech manual suggests replacing CCU. The following is what I did and it fixed the problem, however. Unplug the washer. Remove the top cover by removing the three screws on the back. The CCU unit is in the right bottom corner if standing in front of the washer – it has a lot of wiring. Plug in the unit. While listening to the CCU start any washing cycle. After pressing START you should hear the relay to click. If it clicks twice, within a less than a second, it has a problem. Unplug the washer. Without disconnecting any wires remove the CCU cage from the washer wall. Stand now on the right hand side of the washer in such way that the CCU cage is under your left hand. Pull the right upper corner of the CCU plastic cage (it has a tab) away from you, slide the cage to the right by about an inch, and pull the entire cage away from you. Now knock on the back side of the cage 4-5 times with a bit of force (watch “Armageddon” movie for more instructions on it). Install the CCU cage back. Plug in the unit. Try some washing cycle again. If it did not help, repeat the procedure. If it did not work again, see the following. 3) PUMP DRIVE ERROR. The tech manual suggests replacing CCU.