Problem Description and Possible Solution
One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.
Average mileage: 116,591 (12,259–184,000)
67 people reported this problem
battery when dead and when replaced air only comes out defrost vents under windshield, have not fixed it yet looking for info about this problem
hot air blowing out the vents. No cold air will blow out.
A/C and Heater blows only through defrost vents; problem occurred immediately following battery replacement at Sears. Online Blogs suggest easy, relatively inexpensive fix by replacement of Mode Door Actuator; however, Hummer dealer indicated ~ $1000 repair charge for service requiring removal of entire dashboard.
Drivers side heat comes instead of cold air.
hot air on driver side cool air on passenger side
drivers side stays cold passanger sid works fine just started what's the problem /
air delivery only coming out of defrost vents,problem delivery door actuator failure
ac blows hot even when there is freon
Not exactly sure if it happened when changed battery but close to that time. Air doesn't blow hard and direction varies. Air feels like it is pulsating out of vents. Dealership said it needed new door actuator behind dash. Contemplating repair. very costly.
A/C will only blow through main vents.. will not defrost.. A/C stays running on driver side not matter what the switch is set for
The a/c turns on I can hear the compressor work but no air is blown through the duct systems.
Same thing happen to my hammur one I replace the new battefie it it only blowing air from the defrost area......
ac started pulsating, then heat started coming out of the driver side dash vents while cold air was coming out of passenger side dash vents when in ac mode, now cold air is coming out when it is in heat mode? looking for answers.
AC only blowing hot air. Tried to fix it myself. Took the dash apart and found not get to the actuator above glove box and to the front and under head cross member.
temperature will not stay normal. It will fluctuate and be very hot. I had to run the ac when it was 32 outside to get it cooled off inside. The cool air would only come out at 60. Even turning it to 61 brought out the hot air.
Once in a while the air vent shoots out very hot air! I turn off the system once or twice to resolve it!
Air only blows out Defrost vents. No air out the main vents, heat or cool.
It's not fixed yet, but I have a problem with my battery going dead, and the most recent time, when I got it running again the AC will only blow through the defroster and floor vents. Looking for a solution.
Also, airbags keep deflating but I have the parts to fix it.
Driver side is blowing hot and passenger side is blowing cool. I tried replenishing AC, but as soon as the gas was depressed it came back hot on driver side.