150,000 miles; never had a problem with the AC or any part of the car
U have a blend door inoperative. if u have dual climate control(passenger/drivers seperate heater/air controls u may have a defective switch or a defective interior air temp sensor. possible bad blend door motor as well-hope this helps
SOURCE: Problem with AC, dual climate zones
The temperature blend door on the driver's side might be broken or stuck. Also, if this vehicle does not have the correct amount of refrigerant, it will do what you are describing.
SOURCE: 1999 cadillac Deville cold air blowing out passenger side vents
Sounds like a Blend door issue, but could be the controller switch, Test ALL modes of operation to see what works and what does not. That should narrow it down a bit. The Blend doors are flap/ doors that regulate air flow, newer vehicles are plastic - electric assemblies ...prone to failure. Any clicking or thumping noises during switching modes and on-off suggest a bad Blend door. Hope that helps...good luck
SOURCE: Cold AC but weak Airflow---Also Driver side not as cold as passenger
The air doors are controlled by actuators that on of them or so may need replacing.
SOURCE: 99 STS AC is blowing hot air
I had the same problem but it was blowing hot air on the passenger side of the car. I assume you have the dual zone controls that I have as well. The problem is most likely the damper that controls the flow of hot and cold air into the car. The motorized component of the damper is most likely not working and its stuck in the hot air position.
I had mine replaced by a repair shop so I cant tell you how to replace it but it may be something that you can do if you have the time and patience to work on it.
Good luck
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