I have a rhd 1995/6 Hymer A class B654 and the heating fan under the front dashboard (I think it’s to the left of the control panel) has stopped. There might have been a slight burning smell as well. I can not see for the life of me how to get to it. And I really have no idea how to then try to tackle the problem. And of course with this weather it’s a must. If anyone can help it would be very much appreciated.