This error is usually accompanied by the door lock attempting (and failing) to lock (clicking) six times and then throwing the F22 error code. Grand Master kdog explains the fire drill for this one:

Door latch contains a locking/unlocking solenoid as well as a switch to tell the control that it is locked, sound like that communication is not there in your machine

Click on Pic:

Source: whirlpool duet m#wfw8300sw02 f22 error code