How can I fix my cooker?

A lot of ovens - even gas ones - have electric ignition, an oven light and sometimes an electric fan oven.

So: exactly what have you got? Make? Model?

Have you checked the electrical supply?

Has the breaker tripped in the electricity cupbpoard? that COULD suggest a failed fan oven element but really, we are fumbling in the dark unless you tell us exactly what you have

XXX
January 2016

I would guess that the fan and the lights are part of a cooker hood - and nothing to do with the cooker itself - only the ignition being part of the cooker.

Three faults at once suggests a common cause and quite possibly a fuse somewhere in the house - you do not say which fuse you checked.

Good Luck...
January 2016