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2002 Buick LeSabre - A/C LH Vent Not Working
Posted: Wed Jul 28, 2010 7:54 am
by 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?
Re: 2002 Buick LeSabre - A/C LH Vent Not Working
Posted: Wed Jul 28, 2010 11:20 am
by 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.
Re: 2002 Buick LeSabre - A/C LH Vent Not Working
Posted: Wed Jul 28, 2010 12:11 pm
by 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.
Re: 2002 Buick LeSabre - A/C LH Vent Not Working
Posted: Wed Jul 28, 2010 12:17 pm
by ricmorin
tony1981 wrote: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.