Hotpoint WMA58, about 8 years old. Have just replaced the motor brushes - all is now fine with the motor and spins OK. A little noisy now, but I'm assuming that will settle as the brushes bed-in to the commutator.
Put first load of washing through, but it was quite wet when it came out, even after an extra spin. Have now discovered that during the spin cycle, the cold inlet valve is pulsing (irregularly) and letting water in through the drawer.
I suspect the main board at fault here. Anyone fancy doing some sanity-checking on this?
Valve opens and closes fine during fill cycle, so basic operation is confirmed correct. I assume the valve at rest is closed and therefore requires power to open: there's only two wires connected to the valve, so it must be receiving a power pulse to open (rather than having permanent live & neutral with a control wire - in that case I could believe a valve fault). Power pulse must be coming from main controller. I've ruled out a sensor fault elsewhere, because under no circumstances should a controller be thinking about filling during a fast spin cycle, regardless of whether a sensor says it's overloaded / overfilled / too hot etc. Hence, my thoughts are that the main controller is faulty.
There was a *lot* of fine carbon dust floating around after the old brushes wore out, so there is the possibility that there's an intermittent short around the main PCB somewhere.