Just noticed recently that the fan in my engine bay seems to be coming on quite a lot and I was wondering if it was a fault or a 'characteristic' of my TDi engine? As well as coming on all the time in slow moving traffic I notice it regularly comes on not long after startup and long before the temp guage hits the 90 mark so I don't know what it's trying to cool down? My temp gauge rises steadily to 90 and doesn't move from there at anytime during my drive. I've also had a replacement cylinder head, cam belt and water pump fitted approx 3000 miles ago if that could be relevant? Is this normal?