I have exactly the same problem having just replaced the element. I heard a pop when I switched the oven back on and then the fan remains on. Sorry though I don't know what the answer to this is. I think I'm going to call out an engineer.
Mick
June 2012
cooling fan stat faulty
CK
June 2012
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix electric cookers.