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Old 09-03-2012, 12:45 PM   #1
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A/C or fan question? A/C worked, stopped, works again

Hey guys - I'm hoping to get some feedback on an issue I had yesterday with my '06 Rubicon Unlimited.

I live in Arizona and yesterday on the way back from Show Low to Phoenix I had an issue with my a/c. Here was the issue: When we left Show Low the a/c was blowing cold and during a storm temps dropped and we turned the a/c off and actually put the regular fan on for a bit and got some heat going.

As we rolled into the lower elevation / desert and the temps increased I turned on the a/c and NOTHING... I could hear the a/c unit working but there was nothing coming out of the vents. BUT the unit was working, just no air coming out of the vents. I messed with the controls a bit, nothing. Approximately 30-45 minutes later the a/c came back on and it's been normal since then.

Any ideas on why it wasn't working? I thought that maybe a belt on the fan broke but obviously that's not the case. Of course, I'm not a mechanic!

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Old 09-03-2012, 12:51 PM   #2
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What's up, I also live in Phoenix and drive an 04 wrangler rubicon and my ac does the same flippin thing! It comes and goes. Just did it last week on my way back from sho low as well. If you find out the problem please let me know. It's annoying.

Mike

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Old 09-03-2012, 01:10 PM   #3
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It's probably a lose hose part of the vacuum air system. When there is a disconnected hose or if it's lose, the A/C system defaults to the defroster instead of blowing out of the vents (no matter what you have your setting on).
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Old 09-03-2012, 01:15 PM   #4
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It's probably a lose hose part of the vacuum air system. When there is a disconnected hose or if it's lose, the A/C system defaults to the defroster instead of blowing out of the vents (no matter what you have your setting on).
Thanks man - Is this something I can try to repair myself (I'm not very mechanical at all) or is there any way I can confirm that this is the issue?
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Old 09-03-2012, 01:34 PM   #5
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Yeah it's not hard to check, just pop your hood and follow the air vacuum lines (it's fairly common for these to disconnect on jeeps. Mine was disconnected at 2, but I've heard under the battery is another common place
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Old 09-03-2012, 01:35 PM   #6
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Did that image post fine? It looks messed up on my iPhone app? And I meant mine was at point 5
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Old 09-03-2012, 01:51 PM   #7
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Yeah it's not hard to check, just pop your hood and follow the air vacuum lines (it's fairly common for these to disconnect on jeeps. Mine was disconnected at 2, but I've heard under the battery is another common place
Yeah I can see the image thanks man I appreciate your help
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Old 09-03-2012, 01:55 PM   #8
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auto gremlin?

In most cars with A/C there is an internal control that turns on the A/C when you turn on the defroster in warm weather. I'm wondering if it is something like that.

On my avalanche the temp on the exterior temp gauge can read 10 degrees higher than outside temp. After I have driven for awhile it comes down to real ambient temp. I'm wondering if a temp sensor is sensing the cooler temperature and disabling the A/C. Then, after a period of time it is adjusting and reading the actual ambient and enabling the A/C?

Just a WAG.
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Old 09-03-2012, 06:03 PM   #9
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Yeah it's not hard to check, just pop your hood and follow the air vacuum lines (it's fairly common for these to disconnect on jeeps. Mine was disconnected at 2, but I've heard under the battery is another common place
Yup. Just checked, #2 is loose. Any suggestions on repairing or replacing it?
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Old 09-03-2012, 08:22 PM   #10
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I just plugged it back in and used a cable tie to hold it in place, and I haven't had any trouble with it. You can always order a replacement hose if it's not fitting tightly

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