Hi I have an Ariston FO98P IX oven that has a problem preheating. It takes way longer to heat then the pre-heat time indicated. I have replaced the front led display thinking this would help but it hasnt. The top grill element works and the fan is working. Would it be the thermostat or the element at the back with the fan? It only heats properly in gratan mode when the top element of the grill is on.

Luke, November 2010