The only fan that I know of, and is visible, is the one at the back of the oven inside. But when the oven does ‘cut out’, there is not the usual ‘hum’ of a fan. It’s just silent until it cools down and it will start up again. In day-to-day usage it’s working fine when cooking something for 20-30 minutes. It only cuts out if I want to cook, say, a chicken or joint of meat for an an hour or longer.