Front AC warm, rear AC cold

[Xodus989]

It's a 2005 Yukon Denali

I've recharged the system, and the tubes on the front get ice cold. I pulled the blend door under the dash and manually moved it to the cool side. It seems to be cooling off a little bit, but isn't doing a whole lot. It seems to get slightly cooler while I'm moving, then heats back up.

What should I check next?

 

[Teamiez]

Fan clutch ?

 

[Xodus989]

Fan clutch ?

At speed (45+), the front AC does cool down EVER so slightly, but not much at all. Also no issues with overheating while sitting idle for long periods of time.

I thought I saw on another post somewhere somebody mentioned another blend door, behind the airbag or glovebox? Does anyone know anything about that?

 

[OneofFew]

Reprogram the blend door actuator.

 

[rockola1971]

Plugged up orifice tube. (front)