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Old December 2nd, 2005, 12:19 PM   #1
Sonicjay
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Default TJ heater blower only works on High? Here's why

There is a resistor pack on the blower motor that slows the speed from High (the default, and only un-restricted speed that bypasses the resistor). This resistor pack slows the fan in the first few positions. It is located under the passenger side of the dash, under (well, above, technically) the black kick panel, next to the right side wall. It's only a few screws and an electrical connector holding it in. The part costs about $22, and takes less than 10 minutes to install.
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Old December 3rd, 2005, 09:42 PM   #2
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note: the fan can have high go out and have the lower speeds too, mine only worked on the medium settings, and it was caused by helicopter things that got into the resistor wet, and shorted it out.
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Old February 5th, 2006, 12:32 AM   #3
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mine works on high and low but not the middle two eh? any ideas?
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Old February 6th, 2006, 12:48 PM   #4
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Probably the same thing. There are a couple different resistor circuits I think, so you might have lost one and not the other.

Across all vehicles, it seems the middle setting blower resistors are prone to blowing during a load dump event.
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Old April 10th, 2006, 02:26 PM   #5
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It can also happen from your heater core or evaporator getting clogged with crap, especially from the environments alot of your guy's Jeeps see.
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Old April 14th, 2006, 10:30 PM   #6
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Quote:
Originally Posted by Blackjackbender
mine works on high and low but not the middle two eh? any ideas?
I had that happen to mine and I put a new switch in and all settings work now.
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Old April 15th, 2006, 12:22 PM   #7
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I had that happen to mine and I put a new switch in and all settings work now.
me too its only about $20 at the stealership unless you get it at golling where it is 25 stupid nice dealership
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Old April 20th, 2006, 01:33 AM   #8
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Quote:
Originally Posted by Haggar
Probably the same thing. There are a couple different resistor circuits I think, so you might have lost one and not the other.

Across all vehicles, it seems the middle setting blower resistors are prone to blowing during a load dump event.
Anyone in the Oakland Conty area....I just posted a thread about my front end cavitation on my Jeep Wrangler. Do you know of a 4X4 front end repair specialist in our area? Thanks.
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Old January 17th, 2007, 08:36 PM   #9
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The TJ i just bought runs at any setting for any where from 5-10 mins and then shuts down... Takes any where from 15 mins to 30 mins for it to come back on..
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Old February 17th, 2009, 05:55 PM   #10
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22 bucks? the dealership just quoted me $140!!!!

.....so um...where might i find it for $22?
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Old February 17th, 2009, 06:40 PM   #11
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Quote:
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22 bucks? the dealership just quoted me $140!!!!

.....so um...where might i find it for $22?
What you driving? Just checked for an 03 TJ $18.45 retail at the dealer.

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Old February 17th, 2009, 06:57 PM   #12
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im on High all the time.. woot
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Old February 17th, 2009, 09:25 PM   #13
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What you driving? Just check for an 03 TJ $18.45 retail at the dealer.

huh, well I'll call them again tomorrow and give them another year. and napa has it for about 50 bucks
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Old February 17th, 2009, 10:53 PM   #14
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they are about 25 bucks at auto zone PN Ja1476

Standard Part # is RU352
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Old February 17th, 2009, 11:40 PM   #15
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they are about 25 bucks at auto zone PN Ja1476

Standard Part # is RU352
awesome, now i know this might be a stupid question, but is there gonna be a difference between that 03 part referenced and my 1999? i dont suspect so
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Old February 18th, 2009, 08:32 AM   #16
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Quote:
Originally Posted by Ian Anderson View Post
awesome, now i know this might be a stupid question, but is there gonna be a difference between that 03 part referenced and my 1999? i dont suspect so
So since you never really said do you have a 1999 TJ? Does it have AC? May or may not make a difference. Not all years may be interchangeable. If you provide enough info people can help you better. If a dealership quoted you $140 for the part was that including installation? If not I suspect they didn't quote you for the correct part.
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Old February 18th, 2009, 08:39 AM   #17
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Just looked up the dealer part for a 99TJ. PN 4864957 $45.40 retail.
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Old February 18th, 2009, 02:39 PM   #18
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yes it has AC
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Old February 19th, 2009, 11:11 AM   #19
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Originally Posted by GNJEEPN View Post
Just looked up the dealer part for a 99TJ. PN 4864957 $45.40 retail.

well I went to autozone yesterday and while the part online was 24 bucks, when i got there it was a different part number and 45 bucks. BUT the more expensive one had a picture of it.

screw it, i paid the extra cash just to be over and done with it, should be here friday
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Old March 15th, 2010, 09:20 PM   #20
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Either they changed the layout of those kickpanels on the newer TJs (2006 in my case), or this ain't quite the 10 minute job that was advertised.

Mission accomplished, blower motor runs well again, but definitely not something I could have accomplished easily without the assistance of a certain asian on this board.
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