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GMC Jimmy Climate Control Problems

82 messages,  Last post on Oct 11, 2009 at 6:56 AM

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What is this discussion about? GMC Jimmy, Heating / Cooling, SUV

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#16 of 82 GMC Jimmy A/C Blowing Warm by mkob Jul 08, 2007 (10:03 pm)
#17 of 82 99 GMC Jimmy A/C blowing warm by mkob Mar 13, 2007 (6:09 am)
I have a 99 GMC Jimmy with 122k miles, this vehicle has never had a/c problems up until 2 days ago. Our temp outside is 96 and when I went to use my a/c it blows warm air. I checked the charge and it is fine, all hoses are in great condition and fan is working. I kept running the a/c trying to figure out what the issue was and finally after 17 minutes the cool - not cold air came out. What could be the reason? Replies to this message: repairdog (Mar 13, 2007 2:09 pm) jlflemmons (Mar 13, 2007 4:53 pm) mkob (Mar 23, 2007 6:00 am) jlflemmons (Mar 23, 2007 12:15 pm) tsg3313 (Mar 31, 2007 5:17 am) jlflemmons (Mar 31, 2007 6:10 pm) and 7 more...
#18 of 82 Re: 99 GMC Jimmy A/C blowing warm [mkob] by repairdog Mar 13, 2007 (2:09 pm)
Replying to: mkob (Mar 13, 2007 6:09 am) Pressure switch problem or loose connector (check one on rear of compressor under the air intake) or the comp is leaking or clutch is failing.
#19 of 82 Re: 99 GMC Jimmy A/C blowing warm [mkob] by jlflemmons Mar 13, 2007 (4:53 pm)
Replying to: mkob (Mar 13, 2007 6:09 am) Cheap trick on the pressure switch. If the compressor is not turning, not just the pulley, but the whole thing, disconnect the harness from the pressure switch and jumper the contacts in the harness with a paper clip. See if the compressor comes on, is quiet, and cools. If it does, probably a bad pressure switch.   If it is really noisy, doesn't cool, and you are sure the freon is still in there, I am afraid you may have a worn out compressor. HOWEVER, on my '99 Blazer, the same thing happened and testing showed it was down on freon. Charge was added and a leak test performed. No leak, and two months later it is still working great. The ac guy had the right attitude. Instead of "you need a new compressor", he took the logical approach. "This sucker is eight years old. Some of the freon is going to leak out sooner or later. And this particular system doesn't have that much in it to begin with."   I like a mechanic who can think logically. Replies to this message: mkob (Mar 23, 2007 6:00 am) jlflemmons (Mar 23, 2007 12:15 pm) tsg3313 (Mar 31, 2007 5:17 am) jlflemmons (Mar 31, 2007 6:10 pm) repairdog (Apr 01, 2007 5:49 am) and 6 more...
#21 of 82 ac blowing warm by tsg3313 Mar 18, 2007 (4:59 pm)
I have a 97 jimmy that the ac is not cold. The compressor comes on every 10 seconds or so because I see the clutch engage. I added about 1/2 can of r134a and checked for leak, and found none, any ideas?   Thanks! Replies to this message: repairdog (Mar 20, 2007 12:47 pm)
#22 of 82 Re: ac blowing warm [tsg3313] by repairdog Mar 20, 2007 (12:47 pm)
Replying to: tsg3313 (Mar 18, 2007 4:59 pm) Take it to an AC shop for a test and probably the pressure switch or a loose connector.
#23 of 82 Re: 99 GMC Jimmy A/C blowing warm [jlflemmons] by mkob Mar 23, 2007 (6:00 am)
Replying to: jlflemmons (Mar 13, 2007 4:53 pm) Thank you for the suggestion. I found it was a combination of putting a new belt tensioner on and adding more R134. Even though I did the test for the pressure and it showed I was fully charged I guess my tester was bad. Good news it was not expensive to fix and I did it myself. Replies to this message: jlflemmons (Mar 23, 2007 12:15 pm)
#24 of 82 Re: 99 GMC Jimmy A/C blowing warm [mkob] by jlflemmons Mar 23, 2007 (12:15 pm)
Replying to: mkob (Mar 23, 2007 6:00 am) I love it when it works out right. My gauge showed my system to be fully charged also. It was a little over a half pound low, if I recall correctly.   Now it will make ice cubes!
#25 of 82 Re: 99 GMC Jimmy A/C blowing warm [jlflemmons] by tsg3313 Mar 31, 2007 (5:17 am)
Replying to: jlflemmons (Mar 13, 2007 4:53 pm) where is the pressure switch and harness? and which side do I jumper? I diconnected the harness on the compresor and when jumped blew the ac fuse   thanks Replies to this message: jlflemmons (Mar 31, 2007 6:10 pm) repairdog (Apr 01, 2007 5:49 am) jlflemmons (Apr 02, 2007 7:10 pm) and 3 more... stupidgts (Jun 19, 2007 1:31 pm) and 1 more...

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