Hello, First time post,

I have a 1997 Jaguar XJ6. The A/C Blows Cold but not a lot of air coming out. I checked the codes on the a/c. Codes 23 24 45 46. I know 45 and 46 could be the main codes that are not letting the air flow get to the main center vents. My question is how do I change these vents and where are they located and how hard is it to do it myself ? Ive been looking on the forum here a ton and couldn't find anything regarding where its located or how hard it is or step by step instructions on how to replace it. any help will be appreciated thanks

Thank you.