I must add... while this is an easy fix.. it's a PITA to do because there is hardly any space.
A key is A LOT of PATIENCE.
The first time this happened to me (approx. 1 year ago) I took it to Txxe Pxxs and they wanted to charge me over $200 to pull the dash apart... I told them NO WAY!! They eventually said they could fix it for about $80.
This time I decided to do it myself and realized that they realy did not fix it the first time.... shoddy job

. I am now getting colder air that I can ever remember since I own the car

.
All the best with your attempt.
I will try to answer any questions relating to this.