A/C issues

[DaBrook]

2004 Denali blowing hot air in rear
Took to repair shop days blend door n whole ac unit in back is bad. Does that sound right or is it just blend door? Was having same issue in front too where driver side blows cold but passenger is hot. Any info is extremely appreciated.

 

[M1Gunner]

Up front is the passenger blend door actuator without a doubt. Approx $30 and ten minutes to change.

As for the back it may just be a blend door issue but it may also be the thermal expansion valve is seized. Any other details with the rear other than it's just blowing hot?

 

[DaBrook]

Not much more details than that, just know it blows extremely hot and unable to adjust it at all. As far as the front there's a clicking sort of noise coming from ynder the passenger side dashboard

 

[DaBrook]

Followed up with repair shop and was told the a/c box in rear is broken that even if the blend door was replaced it wouldn;t hold in place because of broken ac box. Please tell me someone is familiar with this problem and has some sort of solution.