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The other day my wife said she heard a "noise" while driving and didn't know what it was. I asked to hear it and, of course, it wouldn't do it when I was listening. Fast forward a few weeks and the AC wasn't as cold as it once was, followed by the air blowing hot on the passenger side, then finally not working at all (all 3 stages in course of one day).

The refrigerant was leaking out the low pressure port in the AC line. The Schrader valve inside the port had an O-ring that failed causing the leak. Any parts store sells the AC valve stem removal tool, but Maserati doesn't sell the Schrader valve separate. HOWEVER, the Schrader valve used in Volvo is identical and easily found out in the wild. I got mine from a Volvo dealer for $10. Amazon and AutoZone, amongst others, also have it available.

Stay cool!
Automotive lighting Cylinder Font Auto part Engineering
 

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Very nice, thanks for sharing.
 
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