Hi All, anyone help on a Neff Double Electric Built in Oven with the top Oven not working at all. Model is U1661NOGB/02 Digital control with what looks like seperate control PCB’s for Top Oven/Grill and Lower Oven. Bottom fan oven ok but top you turn digital control to say top oven but the Temp Dial does not come off a setting in the Dispaly of 5, will not alter at all. Does not have a Normal Stat bit what looks like a sensor.