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Old 09-05-2010, 04:14 AM   #1
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AC only works on low speed

I have a 2001 Jeep Wrangler. The AC only works on the low speed. I see that most people have had problems with the high speed only working and the answer to that was the blower motor resistor. Is the blower motor resistor the problem if only the low fan speed is working?

Thanks,

Shaun

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Old 09-05-2010, 06:25 AM   #2
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probably not. Most likely the speed switch.

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Old 09-05-2010, 08:16 AM   #3
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I gotta go with Chucky Cheese's suggestion that it's very likely a bad switch. If it were the resistor pack, the fan's highest speed would work. Or it could also be the wiring harness, early model TJs like to melt their fan wiring harnesses.
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Old 09-05-2010, 08:36 AM   #4
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I agree, probably the switch. But, please check the resistor pack anyway. It's really easy to get to. Just underneath a thin plastic cover under the right side of the dash. Check the resistor pack condition for rusting or debris in it. Leaves, dirt, etc.. can lead to an early failure. You should check your wire connector for melting as well. (They are right, the 01 TJ's have that problem too. ) I have an 01 TJ also. Which brings me to the question, where do I buy that connector to the resistor pack?
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Old 09-05-2010, 08:43 AM   #5
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If the highest speed fan setting doesn't work either, it's not the resistor pack. The resistor pack is bypassed for the High fan speed setting.

So far as the connector goes, I just spliced heavier gauge wiring around it when mine melted together with the wiring leading to and from that connector.
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Old 09-05-2010, 01:40 PM   #6
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If setting 4 is out on the turn control well.....it's not the resistor. Setting 4 does NOT go through the blower reostate "resistoer". It pulls straight 12v power...thats the problem..jeep had a brain fart there.

And yep, VERY common issue. Saidly the fix is some relays and a new control box if the melting is too bad. Yep I said melting.

Pull the heater/ac control panel out and look at the back of it where the wire connector is connected on the far right side. It will have 3 wires. One which is a little larger and green. Check for melting. Look close. Also at the other connectors for any melting.

"""""to remove heater control box for inspection""""

Remove the defrost vent cover , pull up on the far side not the middle. pops right off.
Remove the ashtray. Open it and push down on the tab on the inside and slide out.
Remove the screw behind the ashtray.
At the top of the center bezel where you removed the defrost vent cover,,,remove the 2 screws that hold on the bezel. Pull the whole center bezel off..pull right off.
The heater/ac controls will have a few screws holding it on...take them off.
Poof your done. and can inspect the controls.

READ through this WHOLE thread. And the links in post #10.
CLICK ME---->>>>http://www.wranglerforum.com/f5/heat...rol-16174.html

If you have any more questions let us know.
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Old 09-15-2010, 09:38 PM   #7
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Thanks. It was the speed switch.
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Old 09-15-2010, 10:35 PM   #8
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Glad you got it fixed up bud.

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