AC problems

[71newlands]

Hi I have an 04 denali once in a while drivers side ac just starts pumping out hot air while driving passenger side is still ice cold problem continues till i shut down ac unit completely for a few minutes.This is happening more frequently as time goes on any help with this would be greatly appreciated thanks jim

 

[NathanJax]

search "blend door actuator"

 

[Super Kevin]

I am having a similar problem on mine. From what I have read, the blend door actuator is probably your problem. You can reset the A/C system by shutting the system off. Then cutting the engine off. After you crank it, turn the A/C on and it should be fine. Mine does this at least once per month in the summer but never in the winter.