A/C problem

2004 BMW M3
145,000 MILES • 3.2L • 6 CYL • RWD • MANUAL
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JOELM123
  • MEMBER
  • 1 POST
My A/C has developed two issues. First, It only cools on the drivers side vents. Second, It has a hissing noise coming from the vents as well.
Jun 22, 2017 at 8:31 PM
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CARADIODOC
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 34,308 POSTS
Sorry that I'm not familiar with your model, but given your second dandy observation of the hissing sound, I'd suspect your system uses vacuum-operated actuators and one of them is leaking or its hose is disconnected. Search the source of that sound first, and hope solving that solves the vent issue.
Jun 23, 2017 at 3:03 PM
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