Climate control problem?
 

Well, I got my A/c recharged a few weeks ago to get it ready for Spring and Summer. Lately I've noticed the passenger side (both front and rear vents) are not as cold as the drivers side. It's more noticeable when the fan speed is on high. Both temperature knobs are at the coldest they could go. I did some research, and it looks like it could be a temperature door(s) is not opening/closing well, But I'm not entirely sure!!??... Any Ideas??...

Oh its a 1999 S80 T6.