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Unread 07-18-2012, 03:02 PM   #1
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2001 FSJ Cherokee 
Join Date: Jul 2012
Location: Worcester, Massachusetts (MA)
Posts: 1
AC Failure

Given the recent spike in temperature I tried the AC on a recently purchased gently used '01 Cherokee Sport. It worked fine for about five minutes, then the cool air stopped, replaced by a warm and humid air flow. Does anyone have any idea as to the problem?

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Unread 07-26-2012, 10:37 AM   #2
narnwv's Avatar
2000 WJ 
Join Date: Sep 2009
Location: Cross Lanes, WV
Posts: 6,397
check out the compressor. Does it kick on then go off (resulting in the warm then hot air)?

Report back.

Also, your 2001 Cherokee would be an XJ, not a FSJ as listed in your profile. Changing that will allow others to help better in the future.

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Unread 09-10-2012, 06:52 PM   #3
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2010 JK Wrangler 
Join Date: Mar 2009
Location: Colorado Springs, Colorado
Posts: 2,012
Sounds like you have a pressure issue with the R-134, you either do not have enough, you have to much, or the system is blocked. My cherokee used to do that when I was sitting still because the pressure spiked as the condenser could not cool the R-134
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Unread 10-24-2012, 04:21 PM   #4
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1990 YJ Wrangler 
Join Date: Jul 2012
Location: angleton, texas
Posts: 72
Not sure if this is the same but my 90 yj ac will blow cold then randomly warm up. I had the freon checked and topped off. I've read other threads and they say my rpm's are too low. So I hit the gas some and the air cools off again. Do I have a problem or is this just how it goes with these ac systems?
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