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Ac blowing hot air instead of cold

On my 2000 buick lesabre my ac is blowing hot air instead of cold air what's wrong with

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  • Anonymous Mar 27, 2008

    2000 lesabre-belt,freon switches,and compressor appear functional, freon was added to bring up low middle of gauge,still blows hot air and tired of stories, want answer. i do know gm had over 100 tech bulitins on this car, includeing air cond. please hlp

  • rick83 Mar 29, 2008

    thanks lot for the information I haven't had time to see if anyone of those solution will fix the problem I have been busi but i will let yall know again thanks

  • darlie241 Jul 15, 2008

    my 98 bonneville is ok on freon and started out intermittedly blowing out hot air. Now it is only hot air. Could it be a relay switch? Do they have fuses?

  • robotman Jul 24, 2008

    MY 2000 Buick LeSabre ALSO suddenly stopped blowing cold air(only hot) as well. Still registers charged with hose test.(gauge) I would LOVE for someone to enlighten me on his matter b4 I spend a fortune to have this fixed, if I could do it myself. I just bought this car, what a way to go.......

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Check for the following problems
(1) Check if compressor is geting power
(2) Check if system have Refrigerant in it
(3) Check if pressure switches are operational
(4) Check Thermostrat setting.
(5) Check for dirty or block condenser or evaporator

Send feed back if you solve problem

Posted on Mar 27, 2008

  • Samuel Allen
    Samuel Allen Mar 30, 2008

    If your A\Cstill blowing hot air

    (1)Check if there is discharge pressure or high pressure from the discharge or liquid side of the compressor.

    (2)Check your suction pressure if there is suction pressure

    There should be a pressure difference on gauge check

    You should be reading a higher reading on the discharge side of the compressor, if the discharge pressure is low ,you may have compressor problem

    (3) Check the compressor engage soleniod if it is locking the pump when it energize, or for fan belt slackness.



    Let me know what works for you.

  • Samuel Allen
    Samuel Allen Mar 30, 2008

    Check for more possibe cause why A\C blowing hot air



    Check expansion valve or metering device for cloging



    Check for liquid dryer for restriction





    Let me know what works for you.

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Cornelius, vent problem could be a pinched or loose vacuum line on controller,faulty AC vacuum motor, faulty AC programmer,etc. needs to be checked out by a good Tech, diagnosed and estimate on repair.
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