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A/C WORKS INTERMITTENTLY

Tiny
JEFFJ
  • MEMBER
  • 2005 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 121,000 MILES
WHAT WOULD CAUSE A/C SYSTEM TO INTERMITTENTLY GO FROM HOT TO COLD ON THE DUAL CLIMATE CONTROL EITHER SIDE AT ANY GIVEN TIME? IS THIS A COMMON OCCURANCE?
Tuesday, May 17th, 2011 AT 5:35 PM

4 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
If it seems to be random, it may have something to do with an interior temp sensor but it would take a professional scan tool to see all the data and run tests.
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Tuesday, May 17th, 2011 AT 6:30 PM
Tiny
JEFFJ
  • MEMBER
  • 36 POSTS
WILL THE MASTERTECH READ IT OR DOES IT HAVE TO BE A FACTORY SCANNER?
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Tuesday, May 17th, 2011 AT 7:59 PM
Tiny
JEFFJ
  • MEMBER
  • 36 POSTS
IT ACTS AS IF THE MODULE IS BAD BUT I DONT HAVE THE SCANNER FOR IT. IF THE MASTERTECH WILL READ IT I'LL BUY ONE
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Tuesday, May 17th, 2011 AT 8:00 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
The Mastertech is actually a clone of the factory scan tool but they cost over $10,000 so I doubt we are talking about the same tool.
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Tuesday, May 17th, 2011 AT 8:06 PM

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