Are the other 2 plates working fine on the hob?
Stupid question but are you using the correct pans as U means its not picking up theres a pan on there.
If its the correct pans and the other 2 plates are fine then its going to be the control board at fault. As on these induction hobs theres 2 main control boards. They control each half so if one half is working but the other isnt then its the control board that powers the other plates at fault.
Its possibley the sensor part on the board thats faulty given the error code you have. But in this case all you can do is replace the control board.
As to be honest thats all that ever goes on induction hobs. You have 4 magnetic plates and 2 power boards. The magnetic plates never fail as its always down to the control board on these.
So to cure this you will need the control board replacing on the fault side of the hob.
Thank you very much, this makes sense. Just the left had side not working and have tried all the pans. Do you know the cost of replacing the control board and who would I contact to do the job? Would an ordinary electrician be able to do this job.
Controls boards are very expensive as you can be looking at about the £150 mark just for the part itself so with labour you can add another £50 on top of it.
As to getting someone in you need an appliance engineer as most electricians dont get involed in appliance repairs so you need a white good repair engineer or ring Belling direct and they can get one of there engineers out for you.