A/Cissue 3rd post Am I in the wrong forum? - JeepForum.com

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post #1 of 6 Old 08-25-2011, 06:42 PM Thread Starter
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A/Cissue 3rd post Am I in the wrong forum?

2000 JGC
Inline 6
Common problem with the a/c defaulting to defrost. Looked for vacuum leaks and installed check valve. My blend door works eveytime and so does my cruise control. So I do not think it is vacuum related. The A/C works every time on defrost and defrost/floor. HOWEVER Sometimes the a/c works on the dash vents and sometimes it will not. Blend door seems to work every time. TONIGHT I noticed that while the a/c was on and the knob set to the dash vents the a/c light was dimmer then when I changed the knob to defrost/feet. The light will get brighter and then dim, brighter then dim. WHAT THE WHAT!!! Short maybe, bad connection somewhere? Any suggestions. It is the manual control single zone heater/ AC. The cruise works fine so I am doubting it is a vacuum issue.


Last edited by Neal; 09-15-2011 at 05:51 PM.
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post #2 of 6 Old 08-25-2011, 07:32 PM
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thats what it sounds like, pull the unit out and check connections, its all electric so by you turning the knob it might not be sending the correct signal
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post #3 of 6 Old 09-03-2011, 08:08 PM
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The problem is most likely the small vacuum tube under the hood on the passenger side by the firewall. This tube feeds vacuum to your blend controls and can develope small cracks. Replace with a rubber line. Don't know about A/c light. May just be button light going bad.
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post #4 of 6 Old 09-03-2011, 09:48 PM
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Why are you flooding the forum with same posting ?
Bump you post ! If you think it's slipped down to far to be noticed... !

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post #5 of 6 Old 09-03-2011, 11:28 PM
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And you STILL haven't given enough, or rather the right, info to help you.
If it's manual temp in a laredo you either have a vac leak it a dead head unit. It's all vacuum controlled.
If dual zone put it in diagnostic mode and compare the codes with the table on wjjeeps.com.

And try to keep it all in this thread if you need more help.try to provide the relevant info too...

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #6 of 6 Old 09-15-2011, 05:51 PM Thread Starter
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