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I will replace the AC pressure sensor/pressure switch on my 2007 Buick lacrosse. I don't have lots of experience but I am learning. I recently changed the oil, flushed the coolant, replaced the thermostat and never had any problems. I know some people will say if you can't even locate don't get involved but I looked everywhere and I couldn't locate it. Where is it?
Thank you

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  • Do you have an issue with the air conditioning?
    – Old_Fossil
    Apr 22, 2019 at 5:01
  • When I try to turn on AC I see the light come on but it doesn't give me cold air. I checked and saw that the clutch doesn't get engaged. I recently did ac recharge and when I bypass AC compressor AC works perfectly. I left it on for like 15 min and it was giving me ice cold air. So we know air compressor works just fine. I also checked the relay and put it different fuse it didn't change anything.
    – Sami
    Apr 22, 2019 at 14:09
  • How did you do the electrical bypass? Did you check voltages at the a/c cpmpressor relay?
    – zipzit
    Apr 22, 2019 at 22:14
  • By paperclip on the relay of ac compressor then ac started again.No I didn't check voltages
    – Sami
    Apr 23, 2019 at 1:43
  • So I replaced the ac pressure switch but my problem still exists, any other ideas? pressure switch was right under the air filter.
    – Sami
    Apr 23, 2019 at 1:45

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Thank you everyone, the problem has solved. It was the low ac pressure switch, not high-pressure switch.

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