I own a 1999 S70 and my AC is acting funny. It starts and stops cooling while driving. When it stops cooling, I can rev the engine to around 5,000 rpm's and it will sometimes start cooling again. I carried it to Auto Zone and the pulled a code and told me that one of my pressure switches was bad. Where could this pressure switch be located? will I have to de-pressurize my ac system to replace it? It's arctic inside my car when it is on, but feels like hell when it's not. I have checked my freon level, and it is ok. Thanks for your help.
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