We had a washing machine that “failed”. All that was wrong was the relays/water intake valves stopped recieving a signal. Ended up spending a week and an old raspberry pi making a stupid replacement controller because the washer was still sending signals, they just werent making it to the relays for some reason. i still can’t tell what part of the original boards failed. also i only programmed one cycle and it no longer senses fill rate D= but it does wash clothes reliably assuming the water pressure (and hence fill rate) is relatively stable.