I have a Whirlpool Duet Sport ht washer. The machine was in the middle of a cycle when the Pause/Cancel button was pressed. Clothes were unloaded and a new load put in. Upon starting the new load ( Power, Select cycle, Start), I immediatley get an F-01 error code. I do not hear the door trying to lock. I tried to unplug the machine and then replug and restart and still get the F-01 error. In trying to search the internet for solutions the indication is that this may be a communication error btween the CCU and the EEPROM ( Replace the CCU?). It is also suggested to run the Diagnostic tests first but I can not find a procedure for this. I found a procedure for a model 8300 and when trying this( Close door, Select key other than Pause/Cancel, press hold 4 secs, release 4 secs, press/hold 4 secs, release 4 secs, press/hold 4 secs - all LED should light ( my LED's do not light) So I am still thinking that the CCU may be bad. Can you provide any further guidance or an appropriate Diagnostic test?

I ordered the CCU from Whirlpool ( took over 3 weeks to get) P/N W10205841. It fixed my F-01 problem.