Constant washer Faulting with a FH fault code

This washer had been faulting since it was 1 year old but it only happened 1 to 2 times a year. As the fault problem became more often, I realized it was a hardware or computer malfunction. But what was the problem? Well the problem always was a faulty flow meter. I replace the valve and the flow meter. But I tested the flow meter several times.-- I replaced the flow meter and the valve. And for once in 5 years it did not fault.