Air Conditioning Help

[dan.hendrickson]

I have a 1999 Chevy Suburban K2500 LT with the 454. I have front and rear A/C controls. The front A/C works fine and blows cold. The rear just blows warm air from outside. Any ideas on what the problems could be with the rear A/C?

Thank you,

[Blazerado]

There should be a valve that controls the flow of freon to the rear AC. Either that or its a bad air door actuator.