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Service Air Conditioning light

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Hi Folks- Was driving my 92 S.DeVille yesterday, and the "service air conditioning" light came on a couple of times. Does anyone have a link to a schematic on how to diagnose this? The A/C on this car isn't the greatest, it cools great periodically, and then just seems to blow hot air. I was figuring I would be needing to do some A/C work, but it wasn't real high on the list of priorities yet.



"Torque it down 'til it strips. Then back off half a turn."


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