Thanks for that 180. Should have thought of that first, as that is the obvious thing to do. DOH!
Well I studied all of chapter 24 and the 153 pages and the blend door is mentioned a few times, but an exact location not.
Not to worry I'll keep searching or ask the a/c chappie when he comes to have a look.
Didn't realize the a/c system was so complicated.. until it goes wrong. Suppose it's the same for any car systems.
Cheers