The ceramic hob is working properly and is for us to replace the ceramic hob of the cooker whirlpool of IKEA that was broke down while moving us. Ikea sells the ceramic hobs with the Lightronic or the Whirlpool brand that we have bought about three years ago, no longer. So I would buy at IKEA, through the short-lived nature of the possible delivery of parts, etc., and fast pace of change in the product range, probably no kitchen appliances cookers or more, which are not guaranteed support for more than three years in service!
Universalceranfelder from hardware stores also did not fit because it must be even the Light Tronic technology, control already in ceramic hob ...