2002 Buick LeSabre - A/C LH Vent Not Working

[tony1981]

I HAVE 02 LESABRE WITH MANUAL HVAC.

WHEN THE A/C IS ON COLD AIR COMES OUT OF RIGHT VENTS BUT NOT THE LEFT VENTS?

[liljoe]

Start with a vacuum and charge of the proper amount, a very small amount of 134a missing from the system will cause this problem.

[steven kiser]

is any volume coming out? or is it just hot? as a rule i always start with a recharge. as stated above even a small amount can make a difference. i believe there is a blend door that controls the volume for the middle vents when a/c is on max. this may be causing an issue. a weak vac module will cause this as well. usually a quick way to see if the vac module is leaking is drive it up a hill and see if it defaults to either heat or defrost vents. i've found pens and pencils in duct work causing problems. i bang on heater box and listen for rattles. if there are any then that's probably your issue.

[ricmorin]

I HAVE 02 LESABRE WITH MANUAL HVAC.

WHEN THE A/C IS ON COLD AIR COMES OUT OF RIGHT VENTS BUT NOT THE LEFT VENTS?

It would be good to know what you have done so far.