Have changed worn out brushes but machine still shows F21 fault. Have tried changing motors with no joy. Is there a way of clearing last known fault on module or is it likely the module has been damaged?
Geoff , If you have a search , there are lots of posts on here about F21 error. You have to enter test mode to clear it.
Selector dial to the off position
Selector dial to the 6 o’clock position
Hold down the speed select button
turn selector switch 1 turn clockwise and release the spin speed button after 3 – 5 secs.
This enters test mode.
Now return selector switch to the off position and the fault should clear.