2003 Buick reagal air conditioner

Tiny
JASPERS_87
  • MEMBER
  • 2003 BUICK REGAL
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 107,500 MILES
I Just bought a 2003 buick reagal LS and the air conditioner work good one time and the next you nothing but hot air. The car has auto climate control and doesnt seem to matter what temp its set on when its not working still get nothing but hot air
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Friday, July 1st, 2011 AT 2:59 PM

7 Replies

Tiny
FACTORYJACK
  • EXPERT
Possibly a blend actuator fault. If an overtravel occurs, it is usually a symptom that the system will default to a full position, hot or cold. It will usually set a fault ode, but you need a scan tool that will access body systems, not just a powertrain code reader. Another concern is whether the compressor is engaging. If it is dual zone, and both sides are warm, or ambient, make sure the compressor is coming on when requested.
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Friday, July 1st, 2011 AT 3:19 PM
Tiny
JASPERS_87
  • MEMBER
When the ac quits workin it blows warm air on both sides. Seems that once it is working it works fine but you shut the car off and the next time you start the car nothing but warm air. Seems like the compressor works one time and then the not the next time. I will look to see if the compressor is working next time it quits
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Friday, July 1st, 2011 AT 3:30 PM
Tiny
JASPERS_87
  • MEMBER
Also if there is a fault code wouldn't it set off a service engine light?
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Friday, July 1st, 2011 AT 3:32 PM
Tiny
FACTORYJACK
  • EXPERT
Not if there are faults in the HVAC system, there is no visual indication to the driver. There can be powertrain faults that disable compressor operation, most of which illuminate the check engine light.
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Friday, July 1st, 2011 AT 3:43 PM
Tiny
JASPERS_87
  • MEMBER
Friend of mine is a snap on tool guy. So I have access to most scanners. You recommend a specific one?
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Friday, July 1st, 2011 AT 3:56 PM
Tiny
FACTORYJACK
  • EXPERT
I am a dealer technician, have no product knowledge of other scan tools. If you can procure one that will access other body systems, that should be sufficient.
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Friday, July 1st, 2011 AT 4:44 PM
Tiny
JASPERS_87
  • MEMBER
Ok thanks for all your help.
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Friday, July 1st, 2011 AT 5:22 PM

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