A/C WORKS INTERMITTENTLY

2005 GMC SIERRA
121,000 MILES • V8 • 2WD • AUTOMATIC
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JEFFJ
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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?
May 17, 2011 at 5:35 PM
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WRENCHTECH
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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.
May 17, 2011 at 6:30 PM
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JEFFJ
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WILL THE MASTERTECH READ IT OR DOES IT HAVE TO BE A FACTORY SCANNER?
May 17, 2011 at 7:59 PM
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JEFFJ
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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
May 17, 2011 at 8:00 PM
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WRENCHTECH
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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.
May 17, 2011 at 8:06 PM