how can i fix my hotpoint aquarius condenser TDC 30 dryer?

I have a hotpoint aquarius condenser dryer TDC 30, it has just developed a fault inasmuch that when it is put on to dry, it will go for about 5 minutes then suddenly stop. After about 5 minutes of being stopped, it can be restarted again but then it will stop again. Has anyone got any suggestions ast to what might be the cause and how easy is it to fix