Can't change heat/ac temperature - JeepForum.com

 
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post #1 of 10 Old 07-23-2010, 08:08 AM Thread Starter
ohfourtj
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Can't change heat/ac temperature

Just did a search and couldn't find anything relating to this problem.

About a year ago I had to replace the switch that controls the speeds for the heat/ac and it fixed my one speed issue. A month or two later I lost the ability to change the temperature of the air flowing out. Is there a replacement part for this and how would I go about fixing it? Is it possible that the hot/cold knob is not engaging properly or is there a thermostat behind it? Any help would be greatly appreciated.

It is a 2004 TJ Sport 6 cyl. with 40,000 miles.

Thanks

-Chris

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post #2 of 10 Old 07-23-2010, 08:14 AM
TheBoogieman
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Pull the knob off and check it for cracks.Mine did the same thing and the knob itself was broken.
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post #3 of 10 Old 07-23-2010, 11:03 AM
bigchevyman24
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Look under the dash below the glovebox. There should be a cable that runs from behind the a/c control that moves a little lever down there side to side. At least that's how the earlier TJ's are. The cable may have come off or broke. That happened to my old 97...

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post #4 of 10 Old 07-23-2010, 11:37 AM
LandoCommando
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The blend door might be busted.
Try a search on that.

Signatures are for attention whores.


Oh the irony.
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post #5 of 10 Old 07-24-2010, 08:28 PM Thread Starter
ohfourtj
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Thanks for the suggestions guys. So far I know the knobs are in good shape and will try out the other two suggestions tomorrow.

-Chris
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post #6 of 10 Old 07-24-2010, 08:58 PM
TinkerAB
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my hot and cold adjustment has never worked i have to reach under the passenger dash and pull the cable by hand.

97 TJ Locked Front and Rear on 35's
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post #7 of 10 Old 07-24-2010, 09:52 PM
LandoCommando
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Quote:
Originally Posted by adam52604 View Post
my hot and cold adjustment has never worked i have to reach under the passenger dash and pull the cable by hand.
In older TJs like ours the actuator is very much mechanical.
Our temp sliders have a cable that go directly to the blend door.
In newer TJ models it is a knob and an electrical connection that operates a motor on the door.

Signatures are for attention whores.


Oh the irony.
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post #8 of 10 Old 08-12-2015, 10:56 AM
crobarcapn
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Quote:
Originally Posted by LandoCommando View Post
In older TJs like ours the actuator is very much mechanical.
Our temp sliders have a cable that go directly to the blend door.
In newer TJ models it is a knob and an electrical connection that operates a motor on the door.
In that case is there a way to test if the problem is the knob vs. the electrical connection vs. the motor to the blend door?
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post #9 of 10 Old 08-12-2015, 01:03 PM
chris142
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pull the knob off and turn the shaft with plyers.see if the temp changes. you can also listen with the key on engine off and hear the motor above the passengers feet if you turn the knob
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post #10 of 10 Old 08-12-2015, 01:08 PM
TheBoogieman
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Raising the dead after being buried for 5 years.

07-24-2010 11:52 PM
LandoCommando

Quote:
Originally Posted by mrblaine View Post
Springs have one job and one job only and it isn't to affect, determine, or create ride quality.
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