A/C now only blows from Defroster and Floor. Cannot get it to come out from center of dash anymore.

[bigbillsd]

2014 4 cyl LTZ Worked normal till a few weeks ago. I have tried all the dash controls and nothing will make the cool air blow from the normal A/C vents in the dash. Is there a simple fix, Service Bullitin or recall. I have yet to find anything about this. Thanks, Bill

 

[Autoworker 74]

I'm not sure if they still use vacuum lines to open and close vents but if they do it could be a vacuum line has fallen off. I don't know that seems like old technology for a modern car but it worked pretty good for 50 years. I had a weak spring on a vacuum fitting that wouldn't let the A/C move from hot to cold. The control would move but the vacuum fitting would not respond.

 

[napajack]

More thsan likely a blend door does not close all the way or there might be nuts or crap i it. Mine had pieces of acorns and leaves. Cleaned it and it works now.

 

[jo43410]

I'm not sure if they still use vacuum lines to open and close vents but if they do it could be a vacuum line has fallen off. I don't know that seems like old technology for a modern car but it worked pretty good for 50 years. I had a weak spring on a vacuum fitting that wouldn't let the A/C move from hot to cold. The control would move but the vacuum fitting would not respond.

I just went through this on mine. Replace the actuator on passenger side under glove box. It will fix it. You can even get instruction on youtube to do it.

 

[jo43410]

2014 4 cyl LTZ Worked normal till a few weeks ago. I have tried all the dash controls and nothing will make the cool air blow from the normal A/C vents in the dash. Is there a simple fix, Service Bullitin or recall. I have yet to find anything about this. Thanks, Bill

Actuator under glove box. Controls vents & airflow. Its 2 bolts & plug. Youtube has videos with instruction. Cheap fix done yourself. Expensive by a pro

 

[jo43410]

I'm not sure if they still use vacuum lines to open and close vents but if they do it could be a vacuum line has fallen off. I don't know that seems like old technology for a modern car but it worked pretty good for 50 years. I had a weak spring on a vacuum fitting that wouldn't let the A/C move from hot to cold. The control would move but the vacuum fitting would not respond.

Actuator under glove box. 2 screws & plug. Cheap easy fix. Youtube has instruction video

 

[[email protected]]

Actuator Motors an PLASTIC gears are wrecking havoc on Auto HVAC's. Parts ain't costly BUT stand'n on yer head for an hour to install is pretty dam loathsome.
Give a round of applause for the Design Engineers....ha..!

 

[rayzat]

I replaced that stupid actuator every 3ish years. My buddy is a certified GM mechanic. He pulled the actual "Chevy" procedure to replace it, remove front seats, remove steering column, drop the dash, it's 2 full days of labor. I asked him what he would do, and he said, go through the glove box.