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SUVs GMC Jimmy GMC Jimmy Climate Control Problems
77 messages, Last post on Jul 02, 2009 at 7:42 AM
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I have a 98 Jimmy and sometimes the heater will blow only cold air. It was working fine last night, but when I used it this morning the air was cold while I was idling. It warmed up once I got going, but started blowing cold again after about 10 minutes. Can anyone give me an idea what might be causing this?
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Replying to: jflo520 (Nov 07, 2007 7:27 am) I also have a 98 Jimmy with the exact same problem. It has been like this for 3 winters and no one has been able to explain, or fix, the problem. Can you please copy me if you find out how to correct this. Thanks. |
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Air only comes out through defrost vents no matter where switch is turned. can not get air to come out of the dash or floor vents! Ac works and heater works but will only come out through defrost vents. Could it be the control unit? or What? Please help. Goodyguy~
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| I have a 98 Jimmy and recently had radiator and water pump changed- coold air blows in when going up hills- any ideas?? | |
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Replying to: goodyguy (Sep 30, 2008 6:23 pm)
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Replying to: smitty36 (Nov 19, 2008 6:50 pm)
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Replying to: JManBrody (Dec 06, 2008 6:03 pm) The fix: typically when this happens it is simply a vacuum line that has disconnected; the problem with these vacuum lines is that they are very easy to remove from the connector nozzles, they're just like the tubing you use for fish tank air pumps. Another reason could be that the vacuum lines are cracked, you should be able to tell by feeling the rubber, if it is not supple and feels hard or brittle it might be time to replace the lines. Should be easy enough, just buy a few yards of vacuum line tubing and replace each line one by one, cutting each to the proper length and reconnect. |
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| So myg/f's 99 jimmy had the heatercore replaced before winter. Now that summer is here the ac seems to have stopped working. The air doesnt blow warm like its outside air, it blows HOT like the heat is on...any ideas? | |
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I've read everyone's problems and comments on this issue, but I still NEED help! My 98 Jimmy only blows HOT air, not just outside temp air, but HOT air. We did the 'reset' procedure, removed the BAT RDO fuze waited 10 secs, replaced it, put the key in on position and waited >1 mins for the ECC to reset, BUT it didn't fix it. When we push the 'a/c' button on the climate control panel, the light goes on and the compressor under the hood kicks in, AND the lines to/from the compressor at COLD, but the air blowing in the car is HOT. Originally I took to a 'shop' and they suggested replaced the Climate control panel (I have been trying to located a used one, b/c the new GM ones are $300) but I can't find one, plus reading the posts some people have done this with NO success. Since the compressor feels COLD, I think there is freon...and the blower buttons seem to be acting correctly (actually the reset 'might' have allowed the blower to respond..not sure at this point if that changed or its just our imagination, hoping the 'reset' did something!) Should our next step be check the 'doors' in the area beside/behind the glove box? to see if they are stuck? I read about a potimenter (sp?) is that the same thing as the actuator doors? This is my daughter's car, limited money, so we don't want to spend a forture on mechanic bills.. ANY SUGGESTIONS ARE APPRECIATED!!!! |
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