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Buick LeSabre, Heating / Cooling
#131 of 278 Wanted to say thanks, but still ask for HELP!!!
Jul 08, 2010 (10:07 am)
First off I would like to thank this forum for your help fixing my 1998 Buick Lesabre's AC. I had the classic programmer issue with the air blowing out of the defroster, and floor only. $1.60 at my local NAPA, and about an hours worth of time and my air is working great out of the vents as it should... Now another small issue has started, when I first start the car (EVERY TIME), I get about 15-20 seconds of HEAT before it switches to cold air. Also the temp on my display blinks for a little while durring this time. Other wise every thing works great, and its 100% better then it was this AM.. Any ideas on what I can do to fix this issue (as minor as it is )
#132 of 278 Re: Wanted to say thanks, but still ask for HELP!!! [gsragtop]
Jul 08, 2010 (1:25 pm)
As you may know I had the same problem. My solution cost $1.79.
That said, everything went along great until the same thing happened to me; heat for maybe 15 to 30 seconds. I was concerned but didn't know what to do. It stopped on its own and all is well. I am not a GM mechanic, but I wondered if one or more of the "doors" directing the air-flow hadn't stuck or the vacuum level dropped for some reason. I was ready to look at my by-pass surgery and see if something had slipped.
I'm glad it's back to full performance.
#133 of 278 Re: Wanted to say thanks, but still ask for HELP!!! [clearlake]
Jul 12, 2010 (6:03 pm)
I am having a very similar problem. Where do you find the blower relay and blower motor to check it?
#134 of 278 Re: Wanted to say thanks, but still ask for HELP!!! [gsragtop]
Jul 13, 2010 (4:43 am)
>I get about 15-20 seconds of HEAT before it switches to cold air. Also the temp on my display blinks for a little while durring this time.
Spend some tiime with the underdash cover and the glovebox off. When you start the car watch the lower rod for the driver blend door. It will move to the right for full heat until it senses a change in temp in the air streams. Then it will go to the normal calculated position for the requested air temp vs. the actual air temps. Then later start the car and watch the upper arm for the passenger side blend door control. It probably won't move properly because the electric actuator has plastic gears inside that have cracked and are slipping on the axle. This may be what causes the error flashing temp light: the programmer isn't able to sense the left and right end points of the movement for the upper door.
Also you might have low freon charge.
Replacing the upper actuator is the solution. If you can move the arm with a light force, that probably is verification the gears have split with age.
#135 of 278 Re: Wanted to say thanks, but still ask for HELP!!! [rhmiv]
Jul 13, 2010 (4:45 am)
The blower motor up to 1999 is on the firewall behind the engine. There's a round bulge with 5 screws. The power lines go up and on top of that same housing and the resistors or blower motor controller for speed sticks down into the air stream.
The relays are in the relay center above the blower motor.
Are you having a blower motor issue? Or is air coming out the wrong vents due to vacuum problems?
#136 of 278 Buick 2000 A/CTroubles
Jul 20, 2010 (3:51 pm)
About a two weeks ago I noticed a loud squealing noise coming from the passengers side down by the glove compartment whenever I turned the A/C on. It would subside after a few mins. A couple days ago I noticed a sloshing water sound from about the same area. Whenever I made a left turn, a decent flow of water would spill onto the passengers side carpet. As of Sunday, there is no air at all coming from the vents. I can feel the compressor engage when I turn the a/c on, but no air comes from the vents. Is it the Blower Motor? Or something else?
#137 of 278 Re: Buick 2000 A/CTroubles [theabbot]
Jul 20, 2010 (7:13 pm)
No air from any vents when the blower is ON? Different speeds? Do you get any sound of rushing air? Probably not after the squealing noise. Probably a bearing frozen up in the blower motor.
However, you can open the hood, open the two little clips on the plastic opening under the passenger side windshield wiper, and inside you'll find either a filter for the incoming air that goes into the cabin or you'll find nothing. If the filter is there, it fits into a plastic skeleton frame. Pull it out. Look down inside and you'll see the blower motor's squirrel cage--the fan part. See if you can rotate it with your fingers. Then turn on the blower motor and see if it rotates?
There also are problems with the electrical connector for the blower motors--it's right next to them under the dash inside.
The water is supposed to drain out the rubber tube that's under the passenger side of the firewall behind the motor. Hard to get to, but if someone supports the car safely and can crawl under, they can use a piece of thin wood or something to poke into the tube. It may have a flattened end that water pressure is suppose to push open or some other way to keep air or water from coming up in from the road. When you push something gently up into it, water will probably start rushing out. Goop of some kind probably has clogged it. Prepare for a bath if you are under the car.
#138 of 278 Buick Lesabre 2000 A/CTroubles
Jul 20, 2010 (7:57 pm)
No air when the blower is on. No matter the speed. I was able to get to the squirel cage, and it turns freely with my fingers. However, when I turn the blower on, it does not move. I noticed that there is a hood looking object that slowly covers the cage when I turn the blower on. It moves in a jerking motion until it covers the cage.
I guess I will have to get under the dash to see whats going on there, and clear out the water tube under the passengers side. Thanks for your advice.
#139 of 278 Re: Buick Lesabre 2000 A/CTroubles [theabbot]
Jul 21, 2010 (7:51 am)
Can you pull it out from the cowl opening?
>fan doesn't move
Connector not making contact? Some have contacts that burn.
Or the blower motor brushes have stuck in their channel where they slide. As they wear they don't move forward and lose contact.
Try tapping up on the blower motor with a vibration from your shoe or fist while the key and controls are both turned ON. See if it makes contact and catches. That would tell you everything else is working right.
#140 of 278 air conditioning water leak
Jul 22, 2010 (8:56 am)
I have a water leak in my 2005 Buick Lesabre. It happens when using the air conditioning. The leak appears to be clear clean water. It's coming from under the dash on the passenger side. The dripping is approximately three inches from the floor board hump. The amount of water is enough to saturate the carpet on the passenger side. I suspect it is a problem with the drain from the condensation removal of the cars air conditioning.
Any help with thoughts about this problem would be greatly appreciated.
Is the drain for the condensation under the dash on this vehicle?