I have the above model (2.5 years old). The top oven/grill is fine but the bottom oven is not heating up as much as it should.
When set to 180 deg , the thermometer reads 140 deg. If I turn it up to the maximum setting it reads 220 deg and the fan kicks in , but the fan will not activate unless the oven is set to maximum.
Does the fan seem to get up to full speed when you have it set to 220. Just wondering if the motor is sticking. Does it make a humming noise if you open the door whilst its on. If not could be a selector switch problem