Probably not - I guess you didn't test the element to see if it was good or bad before you changed it on a guess. And it's difficult to come to the conclusion that the fan might somehow be stopping the element (two elements in your case) from working.
A reasonable conclusion is that both the element and the fan were good to begin with - the question is what could cause BOTH element and fan to not work?
If your cooker has a clock then that may well be the culprit - but I only guess. A defective clock or a clock set to auto will cause the symptom you report.
I suggest you buy yourself a cheap test meter - Amazon have one for less than £4. Or call in a service engineer.
Good Luck...
May 2017
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 gas cookers.