2005 Chevy Suburban 1500 LT driver’s side and passenger side not blowing cold air

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#16089 Closed 2005 Chevy Suburban public

Hi. I have automatic dual controlled a/c in 2005 Chevy Suburban 1500. The a/c was blowing hot air so I replaced the driver’s actuator. Although it was moving when calibrated. Still blowing hot, so I followed your steps and removed the dash and took out the passenger side actuator. This one was also moving properly. But still not blowing cold. The air was cooler but not cold like the a/c in the rear. Since I was in there, decided to look at the recirculating actuator. This one was not moving. Swapped that one out but no luck. Still not cold. Not sure what my next step should be.
Thanks in advance for your help!


Since you are already familiar with the actuators and their movement I would recommend double checking that the new actuators move in a roughly 90 degree arc as the control panel is adjusted from one extreme position to the other.

If the movement is good then check the a/c line temperatures at the firewall where it enters to the evaporator core. Both lines should be equally cold and sweating with condensation (assuming you do not live in a desert area).  Compare the temperature of those two lines to the return line from the rear a/c.  If the two lines that enter the firewall are not equally cold to each other or the return line from the rear then you have a refrigerant issue. Could have a low charge or restricted orifice tube.

Line temps should be checked after the system has been on for at least 5 to 10 minutes with the doors closed. Make sure the fresh air door is set to recirculation also.

If all lines are cold, sweating and equally cold you may need to remove one of the temperature door actuators and turn the door shaft by hand to see if the air turns cold. 

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