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a/c problem, a/c does not blow cold air


mark.357sig
07-31-2005, 03:49 AM
Hi, I have a 2001 GMC Yukon XL. I'm having problem with the a/c. When I turn it on it will work fine at first for the first 30-45 minutes of use, the a/c blows cold air. But after that the a/c does not blow cold air anymore. It'll just blow warm air. I already checked the compressor, new ac relay, R134 pressure is ok,.. any idea anyone? what could cause the a/c to stop producing cold air? thanks
drdd
07-31-2005, 11:06 PM
you need more 134a. Try adding more 134a. It should accept more refrigerant without the pressure rising. Stay within the limits of the gauge though.



Hi, I have a 2001 GMC Yukon XL. I'm having problem with the a/c. When I turn it on it will work fine at first for the first 30-45 minutes of use, the a/c blows cold air. But after that the a/c does not blow cold air anymore. It'll just blow warm air. I already checked the compressor, new ac relay, R134 pressure is ok,.. any idea anyone? what could cause the a/c to stop producing cold air? thanks

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