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99 Buick LeSabre A/C control problem

Hello! There is a new problem with the well-cooling A/C on my 99 Buick LeSabre. It is an "Auto", not "Manual" system. When I press Auto to turn on the A/C it turns on, blower at about half speed and mid-vents on. When I make any change at all - fan speed, temp, vents, etc. the A/C turns off, although the fan continues to run. Any thoughts? Thank you! Steve - Minneapolis

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  • Nissan Master
  • 21,873 Answers

That may be tough to fix. My first thought is the control panel, but it could be the hvac programmer or even the body computer.
Do you have controls on the steering wheel, and can you change temp from there ?
Its probably going to take a shop that deals with electronics and a shop manual to get all of the diagrams.
You could switch out the control on the dash with a used part as a test.

Posted on Jul 16, 2013

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Posted on Jan 02, 2017

roniecon
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SOURCE: 1993 Buick Lesabre Limited A/C problem

disconect the negative battery cable from battery for 20 seconds and replace cable back,then try ac let me know if this helps u

Posted on Jun 30, 2009

  • 373 Answers

SOURCE: A/C BLOWER WILL NOT TURN

HI...
The problem on your vehicle is .
THE BLOWER MOTOR RESISTOR..
when they come damaged the blower motor not work. or don't stop working.
just REPLACE the RESISTOR. and you will fix that problem.
I'm a mechanic for a few years. and have autorepair software
On my PC.

OK... I hope with this information you will fix the problem.

Thank's for use fixya.

Posted on Jul 25, 2008

  • 37 Answers

SOURCE: Blower motor vent selection switch not working

the hvac selector switch in the dash may be the problem.You need to remove the switch and look at the connector on the back of switch,see if there are any burnt wires at the connector or switch.It's all electronic and the switches have been known to burn out on this and other model.

Posted on May 26, 2009

  • 1 Answer

SOURCE: ac fan won't turn off

In my 2001 Town and Country without automatic temperature control, my heater/AC blower suddenly worked only when set on high. Usually, that problem is your blower resistor pack.

I had to search for the one in my van since the parts man wasn’t sure where it was except that he thought it was in the dash somewhere. (In some other vans it was under the hood.) My Haynes manual didn’t have anything on it except a picture showing it with the blower. I found it directly behind the glove compartment. Very easy to get to once you know where it is.

The glove box can be lowered all the way out of the way just by pulling in the sides so the rubber stoppers come out toward you. The sides bend easily to allow that.

The glove box being out reveals the resistor in the heating duct right in front of you. Just remove the two sets of wires and two bolts (10mm socket, I think) and the resistor pack slides right out. Then bolt in the new one an plug the wires back in (they only fit in one way). Fold the glove box back up and press the stops in to get them back in place and you are done.

The resistor pack only cost $12 and change at my dealer. It is part number 1-04885583AB which was a replacement for the same number with AA at the end, so I’m guessing they had a lot of trouble with the AAs and so made a better AB.

Last Winter my heater blower fan worked only on High. I changed the front heater/AC blower resistor pack and was surprised at how easy it is, but I had to figure it out for myself since my Dealer's parts guy was no help as to where the part lived and my Haynes manual was just plain wrong. This was on a 2001 T+C. I'd be very surprised if the 2001 Caravan was any different. Don't know what other year vans would be the same. I do know some earlier generations had this resistor under the hood and Haynes had is with the blower sort of behind the instrument cluster.

Posted on Sep 16, 2009

  • 1168 Answers

SOURCE: FAN MOTOR CUTS ON AND OFF. FINALLY QUIT RUNNING.

As you are looking into the engine compartment from the front it is to the left of the blower motor.
Here is a diagram to help you find it.
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Posted on Jun 01, 2010

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