It only blows heat at the highest temperature setting and otherwise blows cool.It functions the same on both driver and passenger sides.I think at the highest setting it should provide somewhat more heat as well.very warm but not hotThe fan seems to work just fine.Not sure if it's related or not but the ac currently does not work either..Thanx for your trouble I look forward to your response.Gary Beltinck
Is the coolant full ? Any discoloring of the coolant ,look like muddy water ? gm dexcool antifreeze if mixed with regular green coolant can gum up the works , clog heater cores , radiators etc.... Have you ever had the thermostat changed , cooling system flushed ?
SOURCE: 2001 buick lesabre-ac problems
SOURCE: air conditioning in 2000 lesaber
Vent door between the two sides isn't opening or the flex hose going between the two is off.
SOURCE: AC blows cool air on passenger side but warm on driver's
Yes there is both a door and a flapper you have a problem with a blend door motor, it is not switching to cold it is half open and half closed so you need to replace the motor vacuum motor it is under the dash near the heater on the passenger side and if it is the other motor under dash you will have to take part of the dash apart to get to it, to test buy a piece of vacuum hose 1/8 inch diameter about 3 feet long and you can hook it to each of the vacuum motors and **** on the end of the line to see which one is causing you the problem, also could be the control head for the AC inside the car where the controls are, you have to remove the ac cluster ot get to the vacuum switch it's all vacuum operated and if you pull it out you will be able to here an audible sound of air leaking if it's the switch.
SOURCE: 1998 Buick Century Air Conditioner not blowing out cold air
My 98 Buick Century was doing the same thing. Up here is the north we have Canadian Tire. Went in there picked up a aircon recharge kit called RED TEC 12A hole kit costs $40 cnd I put 1 can in on the low pressure side which is the only fitting that the filler would fit on and now I have 33 degree air coming out of the drivers side and a couple degrees colder from passenger side.
I am sure you guys have something like Canadian tire down there you might even try Wallmart.
SOURCE: 99 Buick Regal LS dual climate control. No heat passenger side.
the motor for the passenger side
blend door is shot
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First you must determine if the coolant has reached normal temps ( feel heater hoses with your hand ) . Then you must deternine by switching the A/C ON, is the compressor operating ? If yes to both the porblem would be climate control mode system . Hope this helps
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