Electrolux Oven EOB6632K cutting out

Hi, we have an Electrolux Oven EOB6632K PNC 944 182 607. The oven works, it heats and the thermostat cuts in & out to correct temperature. But after about 30 minutes, it cuts out and all functions are lost though it still has power. So even the oven light won’t activate. Once it cools, it will start again. I can’t see any blockage to airflow. Would it be the thermal cut off at fault and would that result in above loss of all function? Or control board? Thanks if you can advise.