*hot air* blowing through vent even when set to cold - JeepForum.com

 
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post #1 of 8 Old 03-13-2007, 01:34 AM Thread Starter
nori
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*hot air* blowing through vent even when set to cold

My vent blows hot air even when set to the lowest temperature, not with A/C on. The vent is drawing heat directly from the engine compartment and I don't know what is causing this issue. I can also feel the hot air rising near the panels. If anyone here knows of this symptom and have any suggestions, I would be greatly appreciated.

Thank you in advance. My Jeep is 95' ZJ V8 5.2L. Please help.


Last edited by nori; 03-13-2007 at 02:14 AM.
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post #2 of 8 Old 03-13-2007, 03:30 AM
micifus
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check out this thread

http://www.jeepforum.com/forum/f13/automatic-temperature-zone-control-system-board-diagnostics-106446/

it will give you and us a better idea of what might be going on.
Then report back.

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post #3 of 8 Old 03-13-2007, 07:10 AM
wjs81866
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your air door motor is probably not working right; I have the same issue. I have to replace the blend door motor on mine. But I guess it's a little easier then the WJ's since I don't have to remove the entire dash to do it.

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post #4 of 8 Old 03-13-2007, 03:17 PM
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You could have a leak in your system. Try one of those refill cans at Wallyworld or any autoparts stores.


Hunter

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post #5 of 8 Old 03-13-2007, 04:04 PM
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He says this is without the A/C. It does indeed sound like a bad door acutator (motor).

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post #6 of 8 Old 03-13-2007, 04:06 PM
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Or, it could just be the outside ambient temp is warm?


Hunter

04 4.7 HO, limited

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post #7 of 8 Old 03-13-2007, 06:26 PM Thread Starter
nori
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Thanks alot for the link micifus and other's comments. I'll first run the diagnostic test today and post the result here. The ambient temperature outside is pretty cold, and I'm almost certain that this heat is coming directly from the engine.

Before going further into this, I'll run the test first, but just wanted to say thanks for the advices. Will post the result soon. Thanks again.
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post #8 of 8 Old 03-14-2007, 06:56 AM
wjs81866
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When it's 30 deg outside mine blows warm air from the vent; on a warm day if I turn the A/C on it's almost comfortable. You are getting warm air due to the door not positioning as it should based on the control unit settting.

1) 2011 Grand Cherokee LImited
Blackberry Pearl
5.7L
Quadra Trac 2
Lux Group 2
20" tires and rims
Towing package

2) 2011 Grand Cherokee Laredo X
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5.7L
Quadra Drive 2
Quadra Lift
Laredo X Group 25 package
Chrome Fogs and Mirrors
Off-Road Adventure II Package
P265/60R18 Michelin LTX M/S 2's
BWoody 4" Velocity Intake
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