Question about 2000 Chevrolet Silverado 2500

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Chevy Extreme A/C compressor was fixed by me, system was fully charged with 134 gas, but it wont start byself, it just turn on when you connect the A/C compressor cable to the positive terminal of the battery, so which is the problem?

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Pressure switch is bad . when hooked up like you got it do a/c cycle correct?

Posted on Nov 12, 2010

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Air conditioning compressor on my 98 Chevy blazer won't engage. The AC is fully charged. The compressor


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When my A/C is turned on it sounds as if the compressor is running for 5 seconds and then it shuts off. This continues repeating. I have no cool air. Is this possibly a bad compressor or compressor clutch?


It is certainly a possibility but the first thing to check is if the system is low on Freon. Your vehicle is old enough that it might still use R-22 which would be bad as that is not available for the do it yourself type person. If it is 134A then you can get a refill kit at Walmart for $14. It comes with a can of coolant with a connector Hose and Gauge attached so you don't over charge the system.

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A/c will not work . pump will not engage


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try disconnecting the negative battery cable for ten minutes to reset the computer.

good luck

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