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Old 08-30-2011, 06:30 PM   #1
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Cool AC/Heater Control

Ok here is the history. I have had my jeep for 7 years and over the past year the AC/Heater control gradually went from working to not working. At first I thought it was the dirty connections and cleaned then all with $40 electrical cleaner. This still didnt work. When turning the control knob it wouldnt work unless you pressed the knob hard in between the 3rd and 4th blower setting. Now that doesnt work. The knob clicks like it is connecting with the right blower setting, just nothing happens. Should I try to replace the blower control, or the unit all together. Also if im replacing the control all together, will any TJ control work?, ex. putting a 2005 control into my 1999?
Any help will be greatly appreciated. Thanks

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Old 10-20-2012, 04:55 PM   #2
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found out the hard way....there are 2 different ac/heat control unit part numbers for 1999 TJ. One is ( 1-55037612AA ) and one is ( 1-55037473AB ). They are identical in every way except the channeled rubber vacuum diverter inside the control knob. If you get the wrong control unit it will work but the air will NOT come out of the correct vents in any position. I was able to put the old rubber diverter in the new unit. Easiest way to avoid this is to get the part # off the bottom of the old unit before ordering. The style of units and vacuum actuators were changed mid model year for the 1999. Hope this helps someone !!!!!

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Old 10-21-2012, 07:09 AM   #3
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Quote:
Originally Posted by cheffreddy1983 View Post
Ok here is the history. I have had my jeep for 7 years and over the past year the AC/Heater control gradually went from working to not working. At first I thought it was the dirty connections and cleaned then all with $40 electrical cleaner. This still didnt work. When turning the control knob it wouldnt work unless you pressed the knob hard in between the 3rd and 4th blower setting. Now that doesnt work. The knob clicks like it is connecting with the right blower setting, just nothing happens. Should I try to replace the blower control, or the unit all together. Also if im replacing the control all together, will any TJ control work?, ex. putting a 2005 control into my 1999?
Any help will be greatly appreciated. Thanks
Check your knobs - they are prone to split, and will turn but not actually work the control. Fortunately replacements are easily available.
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