I took my the front of my dash apart (stereo, climate control panel, side panels) as much as I could without removing everything and I found the large aluminum support behind the dash was in the way of accessing the sides of the heater box. Please could you post how to get at / change this diverter as a lot of us have the same problem.
Sorry but you are too far away for me to come to take the fan out. I was meaning that if you changed the fan and had the old one, instead of throwing it away, you could post it to me.
For an 02 car, you will need the cable adapter as well (according to my local dealer anyway) which is another 50 pounds as the fan has been updated and old ones are not available any more. If you have found different and it works, please post the part number that the dealer ordered so others can save some money.
Thanks.