Main oven getting too hot on Electrolux EKC5544W?

This is a follow on from a previous problem (http://www.howtomendit.com/answers.php?id=327752).
So I had the motor and fan replaced and thought everything would be dandy, em no. The fan works perfectly but the cut out still kicked in after awhile and completely shut down the main oven. Thinking that the cut out was faulty I went ahead and bought a replacement thermal cut out from Electrolux. Replaced it and now I have a new problem, the oven constantly increases in temperature and gets way too hot and it also doesn't cycle (oven neon switching off) or cut out. Any help on this is greatly appreciated.