2006 Volvo S40 Constant hot air blowing

  • 14 POSTS
  • 2006 VOLVO S40

Air Conditioning problem
2006 Volvo S40 4 cyl Two Wheel Drive Automatic 16000 miles

I just bought a used S-40 described above. This morning I noticed that the air was blowing hot.I turned the thermostat dial to cold (the little graph on the display confirmed that it was set to "cold") but hot air contionued to blow.I turned on the AC and STILL super hot air was blowing. I stopped, turned the car off and when I restarted, it was still blowing hot. I parked it for abt 45 minutes. Re started and then it worked fine. Any clues on what caused this little gremlin malfunction?

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have the same problem?
Monday, October 5th, 2009 AT 6:49 PM

1 Reply

  • 2,537 POSTS

With 16k miles you may still be under warranty depending on the delivery date of the vehicle. The most likely problem with the A/C system going out is a worn compressor clutch but you would need to have it diagnosed to see if that is the problem. Other problems could be low freon, a bad pressure switch, bad relay, bad climate control unit, or the engine control module not supplying the ground? The compressor clutch you can have the clearance measured. Should be between 0.3mm - 0.5mm anything greater then that then you need to replace the clutch on the compressor.

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Monday, October 5th, 2009 AT 11:55 PM

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