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Q: AC only cool out of drivers side vents. on 2006 Buick Lucerne

The AC is not a dual zone AC. Main controls control all vents, sides, ect. Only the drivers side vents blow cool air. Even with the two middle evnts on the dash, the drivers side middle is cool and the passenger side is not cool. Not hot but not cool either. Almost like the AC is not on and the system is blowing just non cooled air out the passenger side.
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The vent airflow and temperatures are controlled by electric motors, and if one of the motors is acting up it can cause this. However I would l first check diagnostic codes in the climate control module and address those, and check that the software is up to date. Also check for any related technical service bulletins.
A good quality shop can perform these types of repairs.
I had the same issue. Blend doors working, temp sensor working, was about to trade the Lucerne but had a shop tell me this will happen in model years around 2006 if the freon is low. I didn't believe them but since it was low on Freon, I thought I would give it a try. It worked. Can't believe it but it worked.
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