Air conditioner is not working

2006 PONTIAC GRAND PRIX
155,000 MILES • 3.8L • V6 • FWD • AUTOMATIC
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KEITHCHOLCOMB
  • MEMBER
  • 4 POSTS
My air conditioner does not work, the compressor is not getting power. I checked relay and fuses all good. I ran hot wire to compressor and it engages and checked pressure of Freon on high and low side also good. Air blew cold when hot wired. What could my issue be?
Jun 6, 2016 at 7:12 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
it might be the pressure switch if it is cooling. try jumping pressure switch red and gray wires see if compressor starts. if it does make sure there is a enough Freon in system which when running should be anywhere from 27-42psi at 75/85 degrees. if not it is a Freon problem. this is for manual control only. if automatic temperature control where you set temperature have it scanned for codes.
Jun 6, 2016 at 8:11 AM
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KEITHCHOLCOMB
  • MEMBER
  • 4 POSTS
Its a dual climate with digital temp control for each side. Is it a scan i can get done at the parts store? Or a dealership thing?
Jun 7, 2016 at 7:21 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
ok that is whole different ball game. You can either go to a dealer or a garage that has a pro scanner for it.
Jun 7, 2016 at 8:45 AM
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KEITHCHOLCOMB
  • MEMBER
  • 4 POSTS
Ok. Thanks for the help man.
Jun 7, 2016 at 9:24 AM
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