Question about 1995 Volvo 850

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A/c blows cold then goes to hot air

On my 95 volvo 850 turbo the a/c blows very cold and may do so for hours or only minutes until it blows hot. It may happen 10 times a day on every other day. When it blows cold it is very cold but then it simply blows hot. You can turn off the a/c for approximately 3 minutes and turn back on and it will blow cold again, until it blows hot. It will blow cold every time you turn it off for 3 minutes or so but eventually will blow hot again. I have had it put on computers at three different shops and one said it was the compressor. One said it was a problem in the dash board controls and the third shop said he didn't know what was wrong with it. Do you have any ideas? Thanks Allen

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  • sirron2000 Oct 09, 2008

    AC blows cold for a while and just turns warm out of the blue and until the engine is turned off .........

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Sounds like a vaccum diaphram may be leaking try listening for hissing noises under dash near the glove box,set blower to lowest setting\off if you can and still have a\c on.

Posted on Nov 01, 2008

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