Question about 1990 Buick Skylark
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Posted on Jan 02, 2017
THe blend door seems to be stuck. When you change settings from defrost to floor air or, vent, the blend door opens and closes directing the air to the place you want it to go to. I have had some success spraying a lubricating oil such as WD40 under the dash on the blend door. You need to get under the dash with a flashlight to locate it. It looks like a flap. Spray it with a couple of shots of the WD40. Go easy on the spraying as you may be inhaling the fumes. Keep the doors and windows open to minimize the fumes. Wait about 1/2 hour and try the A/C functions. (defrost, floor, vent air)
Posted on Mar 09, 2009
i had the same problem there is alot of sonnection wires behind the thermostat and air conditioning switch you take it off and reconnect the wires if that dont wwork you need a speed control box!
Posted on Apr 27, 2009
Sounds like either the computer that controls the auto climate control has gone out or you could have a vacuum leak. I would definitely check the vacuum leak first. I took my 98 Lesabre to a repair shop several years ago for the same problem. When I picked it up they told me my computer was out and it would cost around $600 to fix. As an alternative, they had unhooked and rerouoted vacuum lines, breaking a tube off the controls under the right side of the dash. They told me that they would have to remove my glove box each spring and fall and reconnect the vacuum lines to change the airflow from floor to dash and vise versa. My fix was to run the lines under the dash just beneath the ash tray and connect shut off valves to the vacuum lines. Now when I need to use the AC I can change the flow of the vacuum by simply turning these two valves so that the flow changes from floor to dash or back. I know this is pretty jack leg but the damage had been done and this has actually worked pretty good.
Posted on Aug 23, 2009
SOURCE: 1998 Buick LeSabre Custom I will
Hi! It may not be a vaccum problem. I think that the hoses that goes thru the main vent is the problem. They may have fall thats why theres no air coming out of the main vents only on the defrosters. Check the hoses and connect them to the main vents and it will resolve this. HOpe this helps and have a good one!
Posted on May 18, 2010
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