Starting in around April I turned the AC on and it worked fine. Then a few days later it would start blowing hot. You could kill the motor and then restart it and the ac would blow cold again. This went on for a couple months and now it just blows hot all the time. I've checked the compressor, fuses, bought a new control panel, changed the high and low pressure switches and it is still not working. Also checked freon and it is full. I had it hooked to a computer and the only code that was showing was a bad blender actuator.

i have a 2004 alvalanche that the ac blow out hot air on both side,once and awhile you might feel a cool breeze.this my 3rd yr with this problem.ive taken it 4 mechanics including the chevy dealership twice.ive replaced the control unit, and everything else checked out fine.there was a recall on the wiring for ac.i took it straight back to dealership,and they said this wasnt the problem,but for $89.00 an hr.they would see if they could figure out the problem.i love the truck,but im just ready to get rid of it because of this on-going problem.i hate to even drive it in the summer time..