The motor gives good readings, as does the tacho/speed sensor, no shorts.
So, guessing pcb , which almost certainly rules out a fix from me, and in terms of costs it doesn't make it an attractive option.
Thanks for all your help jj4091 and others, really appreciate having people bounce ideas off and your knowledge of the problems
I wouldn't rule out taking a close look at the PCB with a lens. Even if you cannot repair the PCB, it's worth looking for obvious faults. If you do find a problem, then maybe worth ringing round used washer suppliers, who often sometimes repair them and keep a stock of good, used spares.