Random stops during washig cycle

[Tom1]

Hi, I have a JLWM-1203 (over 10 years old) I replaced the heating element in it 6 years ago and motor carbon brushes 2 years ago. 

The problem I'm having at the moment is that on any washing cycle the machine stops randomly.
The only way to get it going is to enable child lock, then when the machine stops, turn it off on the dial and turn it back on, this makes it continue with the cycle. It is John Lewis own one which I believe is a rebranded Zanussi

Been doing it for about 2 months, I checked the filters, there are no blockages.

The count-down timer also seems in accurate, usually gets to 1 minute left fairly quickly, then still goes on for over 30 minutes with 1 minute left on timer.

I suspected the controller, but in diagnostic mode (on 10th position of the dial) the code displayed is E-52, which would suggest a problem with the tacho coil on the motor.

From manual:
E52    No signal from the motor tachometric generator
Tacho coil on the motor is most probably faulty. This coil reads a magnet as the motor turns to detect the speed that the motor is spinning at and this in turn allows the electronic controller to set the motor to revolve at different speeds for the various program options.

Does this sound correct for the symptoms?

Thanks,

[Whitegoodshelp (Andy)]

If it is then it’s likely to be a loose connection somewhere as it’s rare for a tacho coil (or magnet) issue to be intermittent. 1 minute left on display is often caused by an open circuit heater so check that too.