Oven Repair How Do I Repair My Fan Assisted Oven?

How do I repair my fan assisted oven? - oven repair

I have a gas oven with fan assisted oven Delonghi professionals. The buttons work means the oven and toast in oven, with interruptions only operates when the control to run decides someone has an idea what I can do this and how do I fix this? I spoke with a gas stove repair, I played all interconnected, because they are not registered Corgi, Corgi registered plumbers and do not want to give up the time of day!