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Old 02-23-2014, 04:41 PM   #1
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front vents don't blow??

When I turn on a/c the front vents barely trickle air. Air gets cold and blows fine everywhere else. Just don't understand why only the front vents don't work. Any ideas or advice? And before anyone says it..I know I know put windows/top down! Lol
But I'd like to figure out what's going on..

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Old 02-23-2014, 10:56 PM   #2
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prolly got to much sand and dirt into the vents in front of the windshield, also happened to my wifes 14 jku sahara, had to take the core apart and clean it all out.

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Old 02-23-2014, 11:03 PM   #3
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Check the vacuum hoses on the switch.
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Old 02-24-2014, 10:07 AM   #4
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Quote:
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Check the vacuum hoses on the switch.
I had a problem once where my front vents wouldnt blow until i had some speed but the defroster would blow. Problem was a vacuum hose loose under passengers side hood.
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Old 02-24-2014, 12:58 PM   #5
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Alright. Thanks ya'll. I'll have to check all those things. Probably gonna check for loose hose first, considering I hope that's my issue. Lol
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Old 02-24-2014, 12:59 PM   #6
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Alright. Thanks ya'll. I'll have to check all those things. Probably gonna check for loose hose first, considering I hope that's my issue. Lol
These are the hoses to check. especially where it goes to the vacuum reservoir under the battery tray inside the right side fender
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Old 02-24-2014, 01:12 PM   #7
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Awesome! This will definitely save me some time. I was just going to blindy start checking any hose I could find. Thanks Big Sarge. I'll check everything when I get off work and update if the problem has been fixed.
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Old 02-25-2014, 11:55 AM   #8
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Thanks, I was searching for this! I'll check my vac lines first chance. The selector switch has no resistance at any stops. In fact, it will not even shut off.
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Old 02-25-2014, 12:15 PM   #9
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Thanks, I was searching for this! I'll check my vac lines first chance. The selector switch has no resistance at any stops. In fact, it will not even shut off.
What year is your Jeep? If it is the newer style with the three knobs it is possible that the inside of your knob is stripped and not actually turning the switch. Pull staraight out on the knob and it will come off then you can see if it is messed up or not.
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Old 03-02-2014, 05:16 PM   #10
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Again, thank you. I'll check the knob tomorrow, to cold today! Below 0, and the wind is blowing. BTW 06 LJ Rubicon.
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Old 03-07-2014, 04:51 PM   #11
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I was watching this thread when I realized my vents were very slow, if at all changing. Aha! vacuum leak. My daughter(auto shop major in high school I think) told me that's what it was and that she didn't do vacuum leaks because they were a pain. No smoke machine, tried starter fluid spay and air compressor tricks. Finally in desperation using the great diagram above I was able to trace the lines. Turned out to be the rigid line behind the batter was split and as I pulled it up fell apart. Flexible tubing I had laying around saved me $$ from the dealer who, of course has a smoke machine.

Thanks to everyone on this board who is so helpful. An absolute world of information!

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