Thank you for all that info.
Usually on this one when that happens the motor is the fault. I know this because I fix so many.
To repair this one you will need a new motor.
Its easy to fit with juts a few basic hand tools if you are a little handy.
I will help as best I can.
The best place to get a replacement motor is: http://www.espares.co.uk/
I would call them to order this motor. Please call espares: 0844 9777 888
I will stick with you until this is complete.
Please rate my service kindly.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.
Thank you and have a great day!