BoschW/M wf 0264gb/01

Higuys
Have a puzzle with this. I changed brushes on this machine. They were well knackered and arcing. I was called in becuase machines wasnt spinning which makes sense with brush problem. But now it washes ok right to end of cycle. but,sometimes it will complete a full spin othertimes it will only do a couple of minutes and switch itself off. I have checked airchamber all clear, filter clear and seem to be clearing water fairly quickly.
If I do an empty spin it will spin for longer but more often than not will still cut out after about 3 or 4 mins(total spin time 11 mins)and go to cycle finished.

If it was out of balance I would have though that it would at least tumble to end of cycle not terminate it! ❓

Any idea appreciated.

Thanks

John