Hi. A friend connected my new induction hob today. It has four fields, however the ones on the right do not see the pots. The 2 fields on the left work OK. I'm wondering if maybe the wrong connection is to blame. Is it possible to connect the hob so that some fields heat and others do not? I am a total layman. I would be grateful for suggestions. Should I call an electrician or contact a service centre straight away?