post #1 of Old 08-17-2012, 07:01 AM Thread Starter
sajeepgirl
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AC only works on HIGH

The AC on my 2001 TJ will only work on the highest setting. I know there is a seperate fan for that and that the fan that controls the lower settings may not be working. I am a complete novice on auto repair. Does this sound familiar to anyone? Any ideas on how to fix it? Thanks!

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post #2 of Old 08-17-2012, 07:20 AM
SlackJaw
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Search "blower motor resistor" or the like, and you should find a ton of info on here.

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post #3 of Old 08-17-2012, 07:24 AM
Jimb726
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Unless I am mistaken it will most likely be either the blower resistor (very likely) or the resister pack (not nearly as likely). Part is about $60 at the part store and takes about 15 minutes to install.
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post #4 of Old 08-17-2012, 07:53 AM
TheRealKTrain
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Quote:
Originally Posted by sajeepgirl View Post
The AC on my 2001 TJ will only work on the highest setting. I know there is a seperate fan for that and that the fan that controls the lower settings may not be working. I am a complete novice on auto repair. Does this sound familiar to anyone? Any ideas on how to fix it? Thanks!
We live in Houston, it's either no top and doors, or A/C on high, I fail to see the issue here

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post #5 of Old 08-17-2012, 08:01 AM
jeepjerryp7m8
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Contacts on my switch in the dash got hot and self destructed no fire, no smoke, just heat over time. Purchased a new switch, not the whole control with all 3 switches in it and replaced. Easy to check, just pull the bezel on the center off, remove the switch "pod" and inspect.
Center bezel removal- pop off defrost vent cover on top of dash, this just lifts/pop off, locate the 2 screws that secure the top of the bezel and remove, grab the bezel and pull away from dash, once you start you'll figure it out.
4 screws hold in the switch pod, remove and pull switchs out and inspect the wiring. Also use your nose, give the switches and wiring a sniff. You'll know it when you smell it, burnt electrical has a distinct smell.
Just something to check and it is really easy. Good luck.
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post #6 of Old 08-17-2012, 08:12 AM
Gary2
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usually if you only have high fan speed it is the resistor . high speed bypasses the resistor . I changed mine last week end . Cost me $13.88 at NAPA and it was the exact same brand I removed . Plenty of videos on U Tube showing how . all I needed was a small screw driver to undo the red lock on the plug and an 8mm ratchet wrench ( easier than a rachet and socket ), remove the glove box and the light under it to make life easier . takes about 5-10 min if that
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post #7 of Old 08-17-2012, 09:05 AM
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my resistor was fine, i replaced it and didnt fix anything. took it to dealer and it was the control switch that had burnt out.

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post #8 of Old 09-13-2012, 04:15 PM
xjandyj
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tmblack...same as me..i just replaced the resistor 5 mins ago..and i still only have high....what did they replace exactly..have the part #?.....
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post #9 of Old 09-13-2012, 04:25 PM
Jerry Bransford
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Three things can cause the fan to run only on High... a blown resistor pack, the fan speed switch has burned out, or the wiring harness between the fan switch and resistor pack has burned up/melted. All three of those are common. My '97 TJ had both a blown resistor pack and a burned up/melted wiring harness where it plugged into the resistor pack above the passenger-side footwell.

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post #10 of Old 09-14-2012, 04:19 AM
Neil F.
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Quote:
Originally Posted by Jimb726 View Post
Unless I am mistaken it will most likely be either the blower resistor (very likely) or the resister pack (not nearly as likely). Part is about $60 at the part store and takes about 15 minutes to install.
Resistor/resistor pack is the same thing.
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post #11 of Old 09-14-2012, 05:51 AM
JBTJ
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I'm surprised that no one has mentioned that doing the relay modification will cure all of these problems. Putting an end to this senseless replacement of parts every few months.
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post #12 of Old 09-14-2012, 06:02 AM
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Originally Posted by JBTJ
I'm surprised that no one has mentioned that doing the relay modification will cure all of these problems. Putting an end to this senseless replacement of parts every few months.
I might have, however my new resistor has been holding strong since April without it.

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post #13 of Old 09-14-2012, 07:52 AM
JBTJ
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Originally Posted by SlackJaw View Post
I might have, however my new resistor has been holding strong since April without it.
Hang in there it will go out soon enough. They typically last almost a year from what I have seen.
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post #14 of Old 09-14-2012, 08:03 AM
SlackJaw
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Hang in there it will go out soon enough. They typically last almost a year from what I have seen.
lol, okay I will...I like first-hand experience
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post #15 of Old 09-14-2012, 09:58 AM
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I have an 03 Rubicon. My fan won't work on the first 2 low settings but will work on 3 and 4 - the two higher settings. I assume this is also the same resistor/switch type of problem? Also what is the relay mod that may eliminate all of this?
Also, isn't there some 'special' tool needed to remove the black bezel over the center dash section?
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