Re: A/C won't come on or stay on when its hot outside - Saab 900 Bulletin Board - Saabnet.com
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Re: A/C won't come on or stay on when its hot outside
Posted by earthbrown (more from earthbrown) on Thu, 21 Jun 2007 17:44:40
In Reply to: A/C won't come on or stay on when its hot outside, John Daikh, Thu, 21 Jun 2007 15:41:18
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would guess it is low on freon.
There is a pressure switch to shut off the compressor when the freon gets low. It is possible for it to start up and then shut down due to sensing low pressure.
Check the observation window when the ac first starts up and see if it is clear or if there are bubbles in the line. If there are, it needs some freon....
BUT....make sure your car has 134a before adding, add a little at a time checking the window. You dont want to overfill. Add a 134a with a sealer, you may have a tiny tiny leak, like so tiny it is not detectable.
K
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