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05-13-2010, 04:59 PM
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#1
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Jeeper
Join Date: Apr 2010
Posts: 2,011
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Fan only has one speed..
So my heater/AC fan only works on the third notch up (second from highest speed). Otherwise it doesn't work at all. Do I just need a new switch, and if so, how hard is it to put in? Do I have to pull the dash, or does that part come off? Thanks guys.
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"Not all who wander are lost.."
2000 TJ Sport 4.0
2005 WK (Grand Cherokee) Limited 5.7 HEMI
(OIF '05-'06 Mahmudiyah, Scania)
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05-13-2010, 07:11 PM
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#2
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Member
WF Supporting Member
Join Date: Oct 2009
Location: San Jose Calif.
Posts: 1,006
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Electrically speaking, I'd say you need a switch. On the subject of removing it I really can't help as I have never had to do it.
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05-13-2010, 07:17 PM
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#3
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Jeeper
Join Date: Jan 2010
Location: Del Rio, TX
Posts: 30
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You might want to look into the blower resistor. It controls voltage for each of the blowers settings.
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"If you didn't build it, it isn't yours." - Tim Taylor
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05-13-2010, 07:24 PM
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#4
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Jeeper
Join Date: Dec 2007
Location: Jupiter, Fl
Posts: 335
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I replaced my resistor about 2 1/2 years ago and it works fine. It's under the dash below the glove box and takes some flexibility and working to replace, but it's simple.
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05-13-2010, 08:35 PM
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#5
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Jeeper
Join Date: Apr 2010
Posts: 2,011
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Thanks guys.. I'll look into replacing it.
__________________
"Not all who wander are lost.."
2000 TJ Sport 4.0
2005 WK (Grand Cherokee) Limited 5.7 HEMI
(OIF '05-'06 Mahmudiyah, Scania)
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05-13-2010, 08:38 PM
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#6
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Show Me Your 8008135!
WF Supporting Member
Join Date: Oct 2009
Location: Piqua, OH
Posts: 3,643
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Usually the blower resistor problem makes the blower only work on high speed I think... I'd check the switch too just in case.
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"We don't build great brakes because we think you don't know how to drive, we build them for the guy on the road in front of you that doesn't." - Black Magic Brakes
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05-13-2010, 09:25 PM
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#7
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Administrator
WF Supporting Member
::WF Administrator::
Join Date: May 2005
Location: yep right there.
Posts: 20,687
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Hey brother.
Read here....
Heat & Air?
Speed's 1,2,and 3 out = blower resistor out.
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05-13-2010, 09:29 PM
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#8
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Jeeper
Join Date: May 2010
Location: East Lansing, MI
Posts: 795
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As the resistor fails, you may lose all speeds at once or lose them one at a time. Annoying, but easy to cure.
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05-13-2010, 09:35 PM
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#9
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Show Me Your 8008135!
WF Supporting Member
Join Date: Oct 2009
Location: Piqua, OH
Posts: 3,643
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The only thing is... if max speed doesn't work, I would personally suspect the switch more because I was under the impression the resistor is bypassed on max speed.
Now if 2nd to last and max speed BOTH work...then I'd lean toward the resistor being bad with the possibility of the switch being bad...
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"We don't build great brakes because we think you don't know how to drive, we build them for the guy on the road in front of you that doesn't." - Black Magic Brakes
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05-13-2010, 10:48 PM
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#10
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Jeeper
Join Date: Oct 2009
Location: Underneath my TJ
Posts: 1,614
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Yea, s3nt3nc3d I think is right. The blower resistor restricts the electricity (without getting technical) that the blower is outputting. When the resistor fails, the electricity flows to max capacity (HIGH) so if it's only working on HIGH then the BR should be swapped. If it's not the MAX speed, then I would more suspect the switch being bad. And as s3nt3nc3d said, if it's two speeds working, I'd look more towards the switch but it could still be a blower resistor. The blower resistor is about a $40 part.
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It's got a Willy's body, a Chevy engine, Ford axles, GM transmission, and Dodge steering components... it must be a Wrangler. 
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02-16-2011, 10:53 PM
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#11
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Jeeper
Join Date: Apr 2010
Posts: 2,011
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I still haven't fixed this, but man, this is a great thread.
__________________
"Not all who wander are lost.."
2000 TJ Sport 4.0
2005 WK (Grand Cherokee) Limited 5.7 HEMI
(OIF '05-'06 Mahmudiyah, Scania)
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02-17-2011, 02:18 PM
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#12
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Jeeper
Join Date: Jul 2009
Location: South Carolina
Posts: 712
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to remove the switch, you can look for some of the detailed writeups here (probably stickys) about removing or replacing the stereo. The procedure is pretty much the same.
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