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A/C problem

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Old 06-20-2012 | 04:00 PM
  #1  
jvaughan1's Avatar
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From: tampa fl
Year: 1991
Model: Cherokee
Engine: 4.0
Default A/C problem

My air conditioning will not blow threw vents
Only blows through defrost. Anybody know wats wrong
Old 06-20-2012 | 05:23 PM
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DFlintstone's Avatar
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From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
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Do the other controls work? Fyi, there is a "bottle", a vacuum reservoir behind the right front bumper. If it's broken/cracked, or not hooked up right you might have trouble with the vacuum controls....
Old 06-21-2012 | 02:14 AM
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From: tampa fl
Year: 1991
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Engine: 4.0
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Everythings working fine still blow cold and heater work
Just wont blow bouta the vents and there's nothing clogging them
I'm goin to check wat u suggested though.
Old 06-21-2012 | 02:24 AM
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From: Missouri
Year: 1998
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Engine: I6 4.0 L
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Yep. Most likely a vacuum leak. Also, check along that vacuum line that runs from the canister all the way along the side of the engine bay area and along the firewall.
Old 06-21-2012 | 05:58 PM
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Year: 1991
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Yep the line was clogged. Was getting no vacuum lol
I appreciate the help
Old 06-21-2012 | 06:07 PM
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DFlintstone's Avatar
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Hey! Right on. Glad you got it, and thanks for getting back. Lot's of guys don't, they just walk!! Cant seem to find the words for that.
Old 07-13-2012 | 12:17 AM
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From: Fort Worth
Year: 1999
Model: Cherokee
Engine: 4.0
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Originally Posted by jvaughan1
Yep the line was clogged. Was getting no vacuum lol
I appreciate the help
this might be an old thread but can you post which vacuum lines you guys are referring to?
Old 07-13-2012 | 12:57 PM
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It's usually a good Idea to post what Jeep you have. My 90 has a Reservoir way up behind the right front bumper! A "larger" Vac line runs from the manifold somewhere, back, across than all the way up to that. Then there is a smaller line coming back that goes to the vent controls in the dash. (I don't have cruse, but I guess that would do that as well.
Old 07-13-2012 | 08:41 PM
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From: Fort Worth
Year: 1999
Model: Cherokee
Engine: 4.0
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Originally Posted by DFlintstone
It's usually a good Idea to post what Jeep you have. My 90 has a Reservoir way up behind the right front bumper! A "larger" Vac line runs from the manifold somewhere, back, across than all the way up to that. Then there is a smaller line coming back that goes to the vent controls in the dash. (I don't have cruse, but I guess that would do that as well.
Sorry the one im looking at is a 99xj 4.0
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