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Old 03-06-2012, 08:39 AM
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heat issues

I have a 2002 tj that the blower only runs on high and the vent only goes to defrost.
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Old 03-06-2012, 09:24 AM   #2
Knows a couple things...

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Replace the fan's resistor pack which is a small module that gives all of the fan's lower speeds. It is bypassed for the fan's highest speed.

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Old 03-06-2012, 09:26 AM   #3
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sound like 2 problems to me ... resister for the blower motor bad #1
Poke your head under the driver side of the dash with a flash light look to the right and work the leaver for the vent and see if the vacuum controls are working
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Old 03-06-2012, 11:32 AM   #4
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gotta be the resistor mine did the same thing
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Old 03-09-2012, 10:48 AM   #5
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There's plastic levers that the vacuum actuators attach to that open and close the vent doors. These tend to break off, which would explain the vents not working. You can order new ones at Midwest Jeep Willys or something like that.
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Old 03-09-2012, 11:05 AM   #6
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There is a tempature fuse that opens in the blower speed control (resistor pack). The tempature fuses are not easily replaced.

The speed controls are available at most every parts house, about $45

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