Why does my A/C blow cold on the right side only?

Answer by  MarkGress (479)

There is a diffussor or air separator that separates the air flow from one side of your vehicle from the other. Sounds like this isn't working in your vehicle.

Answer by  DM (228)

Small motors rotate vanes inside the vent ducts of your Buick to switch between (effectively) hot and cold air. If your Buick has over 100,000 miles, it's likely that one of these motors has stopped working. They'll take your dash apart temporarily, but a repair shop can fix it.

Answer by  Allstar (2071)

Many cars come with vents that have shut-off valves, usually controlled with the little wheel near each vent. If those are open, it probably has a clogged or broken HVAC duct in the dashboard. Have your dealer check it out.

Answer by  kossm19 (76)

One reason the AC would blow cold on only one side is that some of the interior vents have become blocked or just don't allow adequate air flow anymore. It could also be an electrical problem in the car itself that would not allow the A/C to function properly and fully.

Answer by  kennethjgoodson (4903)

You probably have a lot of dust and stuff built up in the hose that would blow to the left side. Put a coat hanger through your vent.