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Old 11-27-2014, 10:18 PM
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Join Date: Sep 2009
Location: I live in Newton North Carolina
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2009 Jeep Rubicon heater gone crazy.

This is my first posting so pardon me if I may not do everything correctly.

The heater in our 2009 Jeep Rubicon has always worked wonderfully. But now, it has started to do some strange things. The vents on the drivers side will blow cold air while the vents on the passenger side will blow hot air. Then, it may work perfectly for several days and then the problem returns. When we purchased this Jeep Rubicon in 2009 the salesman told us that this Jeep had more chips than a bag of Lays. Could my problem the one of these chips gone bad? It has been suggested that I might have a clogged heater core but that would not account for the heater working sometimes and not working sometimes. All of the air directional controls seem to function normally. The fan speeds function normally. Although it seems like we and the fan is set on the highest speed it sounds like it is running against some resistance. It sounds more like a jet airplane.

From experience, I know that I could take my Jeep to a dealer and spend hundreds of dollars and still not have a resolution. I would really like to understand what the problem is before I approach a dealer. I cannot be the only person with this problem. I know someone is out there who has experienced this problem before and can tell me what the resolution could be. I don't object to spending the money I only want to spend the money to get the problem resolved.

Does anyone out there have any suggestions or advice for me?

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Old 11-28-2014, 12:04 AM   #2
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Location: Connecticut
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Hmm .. Strange. Hope somebody can help.
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Old 11-28-2014, 03:10 PM   #3
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Almost sound as if the blend door is not functioning smoothly, like it is sticking some of the time. If you pull the glove box you can get a pretty good look at how it is operating. That might save you a trip to the dealer, or at least give you an idea if it is something simple. As for the fan, you may be able to see what is restricting it by opening up the glove box as well. It is behind that, and can be seen when the ignition is turned to on,(not started), to allow the little door to rotate up.
Hope that all makes sense, and helps.
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Old 11-30-2014, 08:22 PM   #4
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Try searching for heater issues. Although many folks think that the newer JKs are the only ones with "casting sand" problems, that may not be exactly true. I remember reading a thread on here where owners with 2010 and 2011 were having the same issue as the 2012 and up owners. Look in your radiator overflow tank and see if you have sediment on the bottom. That would be a start.


here's a good one to start with:


Good luck, and keep us posted!
2011 Jeep Wrangler Sahara-JK, 6 spd., 1995 Jeep Wrangler S, 2.5, 4 cyl., 2010 Chrysler 300 Touring/Signature Edition, 2003 2500 SLT, QC, LB, ETH, DEE, 2006 Winnebago Sightseer 29R (F53/V10/5spd TQShift) 2002 Nissan Xterra 4WD/V6
Other: 2010 Kubota MX4700 with FEL, 1977 Kubota L185.
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heater system , jeep , rubicon

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