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Old 06-19-2012, 02:46 PM   #1
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Foot A/C vent is blowing hot

It doesn't matter what AC setting I have it set on, the bottom blowers are blowing hot air. This is even when the top blowers are putting out ice cold. My AC is battling itself. Any advice?

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Old 06-19-2012, 04:40 PM   #2
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First off, look for any damaged or dislodged vacuum lines.

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Old 06-21-2012, 02:48 PM   #3
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Okay thanks. I'll have to try to get under there to see anything.
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Old 06-21-2012, 05:14 PM   #4
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The most common place for a bad vacuum line would be under the hood.
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Old 06-21-2012, 09:25 PM   #5
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Mine does the exact same thing. Going to look for the leak again. Let y'all know what (if) I find anything. Couldn't find anything once before.... But now that it's hot, it gets really irritating!
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Old 06-25-2012, 08:22 PM   #6
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I wish I knew what I was looking for. I opened up the hood and it was like looking for a needle in a haystack. Anyone else have any luck?
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Old 06-25-2012, 09:18 PM   #7
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Hoop, this thread might help (hopefully)
http://www.wranglerforum.com/f5/vacu...m+line+mystery
Ignore the part about removing the battery, but it should help a little bit
If you have more questions about the diagram or where the lines
connect, post them, & I'll help if I can.
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Old 06-29-2012, 08:29 AM   #8
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Thanks! I will try to chech it out today.
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Old 06-29-2012, 11:35 AM   #9
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Thanks for the info. I looked at all that and all appears food under the hood. Looks like I'll be pulling the cluster apart this weekend!
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Old 06-29-2012, 11:36 AM   #10
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Meat to say, all appears good...
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Old 06-29-2012, 11:43 AM   #11
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Must have fat fingers today. That one was supposed to say meant not meat. Should read the post before posting I guess.
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Old 07-06-2012, 06:12 PM   #12
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Y'all have any luck?
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Old 07-06-2012, 06:29 PM   #13
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Looked at all the connections. Both under the hood and behind the switches. Didn't see anything I could tell was leaking. Did notice though that my fan switch blows harder on the low setting than the second setting. Then the third jumps back up. Always something coming out at the feet though. Eventually I'll get it..... Prob do it all again this weekend.
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Old 07-06-2012, 06:48 PM   #14
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I thought I had the same problem and battled it for weeks. Turns out it WAS NOT the A/C duct throwing the heat, but rather the rubber boot around the automatic transmission shift cable. The hole in the firewall is about 2" in diameter and right behind the exhaust manifold. It has a rubber boot around the 3/8" cable and suppose to snugly fit into the 2" firewall hole. Mine was inadvertently pulled out leaving the 2" gaping hole and heat poured through it when the engine warmed up in a matter of 2 minutes. Check yours, it's easy to see right behind the floorboard air box, next to the accelerator cable.
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Old 07-07-2012, 10:24 AM   #15
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Thanks BB this ^^^^ solved my problem
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Old 07-16-2012, 12:33 PM   #16
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That isn't the problem with mine. I just went and checked. I just checked and put it set to blow out of the dash as well as the foot blower, up top was ice cold, lower was hot as heck! It didn't get better with time either. I turned it up full blast and it seemed to get hotter down low. Anyone else have any more advice? Texas heat is starting to be killer!!!!
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Old 07-16-2012, 04:40 PM   #17
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Ttt
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Old 07-17-2012, 01:09 PM   #18
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Bump
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Old 07-19-2012, 12:40 AM   #19
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A/C units have valves that are supposed to open and close letting in more cold or warm air, sometimes the valves get worn and stick. so it it's stuck it's gonna be letting hot air in and block any cold.
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Old 07-20-2012, 03:12 PM   #20
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So is there a way to close those vents? Thanks for the info!!
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Old 07-22-2012, 02:20 PM   #21
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Old 07-22-2012, 02:34 PM   #22
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Same thing for me, floor vents are warm air and top are ice cold. Not a problem here because weather never gets over a hundred or so. It hasn't bothered me enough to think something was wrong, just thought it was another Jeep thing
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Old 07-23-2012, 09:08 PM   #23
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Quote:
Originally Posted by hoopdogg View Post
So is there a way to close those vents? Thanks for the info!!
I'm not sure about how to close them manually,
but you can look under the dash from the drivers side while you or someone else cycles the mode switch through all of its positions, and see if all of these vacuum actuators are working properly (or if they are working at all)
Get your head down near the brake pedal and you can see these 3 actuators, you will know your in the right spot when the interior light under the dash burns your right ear, lol
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Old 07-23-2012, 09:36 PM   #24
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And if you just want to remove the hot air, you can loop the heater hoses & bypass the heater core. That will definitely remove all heat from your vents.
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Old 08-07-2012, 09:15 PM   #25
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Hoop, have you checked the blend door motor?
passenger side, under the dash.
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