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A/C Compressor?

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Old Jun 17, 2009 | 11:33 AM
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Default A/C Compressor?

I am trying to charge my a/c on my 96 LT1. I have tried and tried and cant get the freon to go in the system the compressor is not coming on. I am starting to think its the low pressure switch. Its the 3 wire switch is there a way to bypass it? Its there anything else i can try to make sure the compressor will kick on? Any other suggestions would be great.

Thanks,
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Old Jun 17, 2009 | 12:01 PM
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you can try to hard wire it to the battery to turn on. Oter than that i think there is something wrong with the compressor or switch if it won't kick on after the hard wiring it to get it to accept the freon.
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Old Jun 18, 2009 | 08:46 AM
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Anyone know if there is a way to test the low pressure switch its a lot easier to get to than the compressor also i changed the compressor out already it should be good.
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Old Jun 18, 2009 | 12:05 PM
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did you put a new compressor on it or used? Also this might sound dumb and not to insult you but are you sure you hooked the wires up to the compressor after installing it? also you should be able to jump the compressor so you can determine if its a switch or not. i would first jump the compressor before i did anything. then if that doesn't work then i would look into the low pressure switch. hope this helps.
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Old Jun 19, 2009 | 11:01 AM
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Yeah. . . . . . . . .

Have you pulled a vacuum on the AC system? < I really hope you did.
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Old Jun 22, 2009 | 09:29 AM
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Yes I did pull a vacuum on it.
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Old Jun 22, 2009 | 10:05 AM
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I know when I switched mine out there is a feature that when the compressor is low on refrigerant it will not turn on. I just bypassed it by jumping the wires to the battery and added a can of refrigerant, after it got some in the system it works properly and comes on as it is supposed to
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Old Jun 22, 2009 | 10:20 AM
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yep i had to bypass the low pressure switch on my dads truck but when i changed mine on my car i didn't. guess each compressor acts differently
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How do you bypass any of the high or low pressure switches?
What do you mean by pulling vaccum?
Thanks
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Old Jun 23, 2009 | 07:21 AM
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yeah what wires do you jump to the battery to bypass?
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Old Jun 25, 2009 | 03:56 PM
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bump i would like to know as well i am trying to figure why mine isnt coming as well.. i tried to add freon and put it up to specs but the compressor never kicked on... theres 2 wires going to the compressor i think one green one black... Im guessing the green is 12v and the black is ground..?
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