Brushes good has red light blinking on control board cleand brushs stil same prob.

due to carbon dust build up around the drum motor in most washers that have non linear motor that have carbon brushes
you can get a state of error i call a ghost error
as its just due to the build up of carbon powder around the motor its connector and stator coils {speed pickup}
as the brushes deplete you end up with a pile of it building up between the brush contact and the motor housing leading to electricity leaking to earth of the motor metals

so a stiff dry new paint brush and give the motor a good brush around to remove the conduction path the dust creates

this effects the low voltage sensors in the motor like its speed control etc
leading to the mcu controller board miss diag the motor as bad and you get a E or F motor error
also this can and will trip your homes MCB detector and ECLD mains power switch

as i say its a ghost error and easily solved

any engineer worth his salt when fitting new brushes or even looking at this fault
will do this first to try to clear the fault if the brushes are aok
before he condems the controller board ... as bad

a new set of brushes should be part of a service you should carry out
much like an mot when its outside its warrenty period

and brushing out the old dust
should be done anyway when new brushes are fitted when needed
or there condition checked as still ok

basically brushes should be about at least 3/4 " long for a life left of about a year
and have enough preasure on the armature to ensure good current flow too it via the stator
if you have motor F or E fault conditions or a machine that trips your mains on spin etc
this prob needs done anyway
a set of brushes it cheep and a brush is also cheep

so give it a good brush out
then reset the machine
you power off at the mains
you hold in a button or two
you power on at the mains
ive read some machine need the program switch to be placed and then dialed like a safe to reset the main board from some types of motor fault
caused by carbon dust build up typical candy auto washers.. and others
they make it hard to make people money