What you will find is its more then likely worn carbon brushes in the motor causing this fault.
What you need to do if checking yourself is remove the back cover of the washer and make sure its unplugged.
Then from there you will see the motor at the bottom of the drum.
Remove the motor and at the back either side are the carbon brushes.
Remove these and see if they have worn down. If they are only a few MM long then they have worn and will need to be replaced.
Then refit the motor and retry the washer and see how it goes from there. Fingers crossed its just worn brushes and that will cure the fault from there.
If you need anymore info just get back to me.