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Bosch Excel laboured motor after brush replacement

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Hi All,

Had a Bosch Excel 7 (WAE24468GB/06) for a while now and it's been faultless. However, the other night it refused to spin and posted a F.21 error on the panel. After a reset, it cleared but the motor still was silent.

I ordered some replacement brushes (not Bosch, just pattern parts) and installed them. The original brushes were completely worn out. Now the washing machine flashes F.21 and the AQUA PLUS light is permanently lit. 

I have tried to clear the error (power off, on to 6 o'clock, press rpm/spin then move to 7 o'clock etc ) to no avail. 

Having said all that, I have been able to start one wash. During the wash the motor was very laboured and the drum didn't seem to spin much. Sometimes it would judder, other times it barely moved.  Needless to say the spin never happened!

Now it's back to F.21 and AQUA PLUS light on.

Anyone come across this before?What does the AQUA PLUS light with a fault indicate?

It could be the motor, but maybe it's the "pattern parts" I've used. I really don't know where to turn now.


Any help really appreciated!


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  • Root Admin

If the motor is sparking excessively and labouring after fitting new brushes then either the brushes aren't fitted properly or the armature in the motor may be worn. I never liked pattern carbon brushes but they usually should still work - just not last as long.

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