Question about 2001 Cadillac DeVille

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Air Conditioning My 2001 deVille air conditioning runs cold on the passenger side and rear seat systems, but is warm most of the time on the drivers side. When it is very hot outside the whole system will occasionally go warm, but cycles back cold without much change in driving conditions. I have checked the cooling system fluid levels and topped it off with DexCool. That didn't seem to change anything. I didn't think it would because the engine temp was pretty steady before. I don't think its a refrigerant level problem because it really does blow cold at times. I also don't think the compressor is cycling off and on because it goes for long periods when it is cold on the passenger side and warm on the drivers. I have changed ever system setting, including air recirculating and nothing seems to improve the situation. Got any ideas?

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  • rllec Jul 11, 2008

    Same problem on mine I removed all servos and manualy shifted all door flaps still no change. the evaporator was changed for leak and doors seal's checked.



    But there is still a 10 degrees difference in passenger & driver air vent

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Try changing the lower temp sensor in the air duct on the drivers side. I bought one and never replaced it. before the part arrived I took the lower sensor out and taped it up and put it back under the dash... not in the air duct housing were it belongs. believe it or not it works so well I did not even see a need to change the thing.

Posted on Jan 08, 2009

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It sounds to me that one of the cables or servos is loose or faulty causing one or more of the direction flaps to be left open or closed ,whatever the case may be ..hope this helps

Posted on Jun 22, 2008

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