AEG Competence B21190-1 - Help, my oven won't work!?

Hi, I was using the oven function a week or so ago when the switch to all my household sockets tripped. I flicked the switch back on again, everything seemed fine and I continued to bake for a further 10 minutes, thinking the problem was solved. The next day when I tried to use my oven, I foung that everthing was working, except the cooking/baking function, meaning that although I can hear a fan, the oven does not heat up. Any suggestions as to what it could be and how it could be fixed?