If there are E01 and F06 fault codes on the screen, you are dealing with a poor connection between the main control board and the motor control board. The latter is mounted to the washer’s floor. The former is located under the top panel and collects about a hundred wires from all electronic components. To check all these connections, you need to remove the top panel and the bottom front one. This error is really bad because it is very hard to tell, which of the two boards is faulty, and you have to replace them randomly. There is an opinion that the main control board is more likely to go faulty, because it is the first part to accept electricity from the mains and therefore takes the whole brunt of possible power surges.