Thread: 99 GTP A/C works great, then stops, then works great again

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  1. #1 99 GTP A/C works great, then stops, then works great again 
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    Hello fellow Grand Prix lovers. I was wondering if anyone else has had a solution to my problem. I own a 99 Grand Prix GTP. The compressor was replaced a year ago and my A/C is super cold. One day the car was sitting while running with the A/C on and the compressor just cut off and would not come on again. Since I'm in Florida where A/C is a must I hightailed it home. After turning the car back on the A/C worked fine again. Later that week it did the same thing when I was sitting at the bank. This time I turned off the air and tried it a few minutes later while going down the road. It worked fine and didn't give me any more trouble. THe other day I was driving down the road and the A/C just shut down. Same thing happened. I waited awhile then tried it and it worked fine again. I swapped out the A/C relay in the fuse box with an identical one that was used for something else but this had no effect. I just wondered if anyone knew if there is a sensor or connector somewhere that has problems with intermittent results. Any help would be greatly appreciated.
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  2. #2 Re: 99 GTP A/C works great, then stops, then works great again 
    The mod from over yonder TheOtherNick's Avatar
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    There is a pressure shut off switch for the compressor. Also please don't type in bold.... BOLD=FAIL
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  3. #3 Re: 99 GTP A/C works great, then stops, then works great again 
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    Thanks for the info. Sorry for the bold. Have any idea where this switch is located?
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  4. #4 Re: 99 GTP A/C works great, then stops, then works great again 
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    Try the connector on the compressor, sometimes can come loose.
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  5. #5 Re: 99 GTP A/C works great, then stops, then works great again 
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    Also wondered since the switch is working most of the time if it's servicable or if there's a connector issue at that switch?
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  6. #6 Re: 99 GTP A/C works great, then stops, then works great again 
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    Probably just a bad connection at the compressor.
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