I have the above single oven and all the fans and elements have stopped working. However, the display and oven light works and setting the timer makes the light come on and off correctly. When power is first applied the temperature display shows 444 until you select an oven program.
I have checked that mains power is getting to the main board and all elements are showing resistance and not open circuit. The PTC is showing about 500 ohms resistance.
Is this a known problem that can be fixed?