Very easy to repair. Just take out the induction hob completely (after turning the supply off at the mains), no need to disconnect any wiring provided you have enough slack cable. the hob glass is held onto the hob unit itself along the four sides of the hob by small Philips screws about 10 to 12 of them. It is very obvious which ones. lift off the hob glass and drop on the new replacement. No electrics involved at all. The glass just sits on top of the hob and is fastened with the small screws. Even the biggest numpty could do it. Total time about 15 max. The biggest headache is the replacement glass, which you get from the hob manufacturer. Now this is the problem, Bosch charge £225 plus VAT for the replacement glass!!!!
But you would save the £95 call out charge for their engineer to fit it.
OK I suppose if you don't want to go through the insurance and the hob was very expensive in the first place.
For cheapo hobs then then replacement is the only answer or buying a non working hob with good glass off ebay.
Mike N.
June 2015