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my 05 trailblazers a/c compressor won’t kick on sometimes. It only happens one or two times a week. It only happens when you first turn the car on. After driving a few trips it starts working again. Any suggestions as to what the problem is.
 

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First, hook up some good quality AC gauges (high and low sides), tell us the ambient outside air temp. then tell us what pressures on both gauges you see on the R-134a scale, … not the R-12 scale.

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