No problem to my Knowlege concerning the Vacuum.

If you have some time inbetween you might look up if you need to change the Filter/Dryer in the AC System (if this system has one).

I have never done AC work on a Car but I have read that if the Dryer is exposed to Air moisture it starts to mess up the innards of the Dryer.

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84 300D, 82 Volvo 244Gl Diesel