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

  • 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

1 Answer 1


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

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.