Question about 1999 Cadillac DeVille

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A/c blowing out hot/room temp air & it's full of freon. also I believe it has a leak.

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  • yadayada
    yadayada May 11, 2010

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Not possible to be full of freon and have leak,freon will never break down in a sealed system

Posted on Jun 23, 2009

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1 Answer

97 Plymouth Breeze won't blow cold air due to freon leak.


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the auxillary fan is located right beside your radiator fan.

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When self adding freon after it leaks out you get air trapped in the system. After adding freon a couple of times the air expands not leaving room for the needed freon. To continue adding freon with air tapped will knock the compressor out pretty quickly, there's not enough room for both & the air is keeping the freon from being able to cool properly give the false indication of being low on freon. The freon you are adding has the dye added to assist in finding the leak since freon does not evaporate nor dissipate it its being leaked out. A black light will assist locating the leak. The best thing is to have the unit checked & serviced by a mechanic...he'll charge about $ 150.00 to check for leaks, remove the old freon...his machine will tell him how much air its trapped in the system by how little freon is removed. For the service fee he will replace valves & gaskets, where needed, correcting most leaks. After sucking the system down & recharging the problem should be corrected.

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Hi, my best advise is to have your air check for freon leaks ,low freon causes the compresor cluth to stop working ,this can cause the air to blow hot .......

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Only cold air on passenger side


I would assume with multiple people having the same problems, there should be a service bulletin on this issue. may want to call dealer with vin # to verify. sounds like a heater control issue under the dash. something i would leave to the experts for repair

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