I have had my delonghi dtc90df oven for about 3 years and have had no problems with it. Yesterday it tripped the electrics and now it will not heat up. The fan and light are still working but there is just no heat, and it does not heat when I try the option of not using the fan. Could it be the element that has gone? It is a dual oven, and the other oven is working ok, it's just the larger fan oven