Question about 1999 Chevrolet Silverado 1500

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What would cause AC clutch to not engage when ac is turned on 1999 Siverado Z71,It blows air but its hot air even when on max AC someone said that the clutch on commpressor wasnt engaging do you have to replace the whole commpressor

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  • jeremy_edwar Aug 25, 2010

    also I tried to recharge with freon and when we hooked it up the gage went straight to red and says overcharged, I have checked fuses they are fine and where is the accumulator located

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This could be a few things.
1- Check fuses for A/C
2- Check to make sure the unit has freon
You have a switch on the accumulator that is called a low pressure shut off switch. It prevents the compressor from running when the freon is low. I would suggest if it is not a blown fuse, have a certified A/C repair garage take a look at this.

Posted on Aug 25, 2010

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  • Bryan
    Bryan Aug 25, 2010

    The accumulator is the big silver looking tank probably on the passenger side firewall. It will have a plug with 2 wires. This is going to the low pressure switch which cuts off the compressor if there is a problem. If the gauges cannot give accurate reading unless the compressor is running.

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2 Answers

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