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Old 11-22-2013, 12:51 AM   #1
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2012 JK heating dial temperatures

I would like to know at what temp the hot air should be coming out of the vents in my 2012 Jk. I have manual temp control, and it was -1c outside. I turn the dial to exactly to 12 O clock and the air coming out was about 20c. It seemed cool. I turn it 1 notch to the right and it was warm. It seems like in the red zone on the dial the air was very hot or just warm to cool. There is missing something in the middle. I was wondering if this is normal and if anyone is getting some heat when the dial is in the blue posititon. I'am not. thanks, Peter

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Old 11-22-2013, 01:22 AM   #2
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Was you engine at operation temperature?

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Old 11-22-2013, 03:00 AM   #3
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Quote:
Originally Posted by Willie_Waller View Post
I would like to know at what temp the hot air should be coming out of the vents in my 2012 Jk. I have manual temp control, and it was -1c outside. I turn the dial to exactly to 12 O clock and the air coming out was about 20c. It seemed cool. I turn it 1 notch to the right and it was warm. It seems like in the red zone on the dial the air was very hot or just warm to cool. There is missing something in the middle. I was wondering if this is normal and if anyone is getting some heat when the dial is in the blue posititon. I'am not. thanks, Peter
If the dial is in the blue its goin to be cool air if in the middle of both blue an red its kinda like a room temp feeling an any adjustment to the red will get you the heat. Make sure your up to operational temp like stated. Just for an example I keep my fan on the first notch/dial marking an I put the heat on the 3-4th red marking an its plenty hot there. If you wanna see how really hot it can get turn the heat an fan all the way up an it will melt you.
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Old 11-22-2013, 04:37 AM   #4
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At -1c you definitely would not want blue lol. I am in Phoenix where it was about +80F yesterday-I used blue.

At -1c I would be as far red as the dial goes as I am a freeze baby. The heater on the Wrangler is the best of any vehicle I have ever owned. Turn it as far red as it will go and you could probably heat the vehicle next to you too!
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Old 11-22-2013, 11:52 AM   #5
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The temperature dial just varies moves a flap. That flap varies how much air is directed over the heater core and how much bypasses the heater core.

The temperature coming out of the vent varies based on the temperature of the incoming air. And, of course, that varies by the setting of the recirculate button. When it's off, you get outside air. When it's on, you get inside air.

The air coming out of the heater core at full hot (with the A/C off) should be around 160*F (71*C). Trouble with the temperature knob is, it's difficult to get the blend to come down exactly the same for every stop on the dial. Turning from full hot to one notch down won't do much. Neither will one notch up from full cold. As you get towards the center you get the widest swing between notches.

If you're talking about a wide swing with just a small adjustment on the knob, that's just something that can't be easily changed.

If, on the other hand, you're talking about the fact that it's a lot cooler than you expect it to be, that's another problem. Check the temperature of the vents on the drivers side and the passenger side. They should be pretty much the same. If the driver's side is much cooler, it's a problem with the heater core and it needs to get fixed under warranty.
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Old 01-16-2014, 10:36 AM   #6
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So I went to the dealer and there is a service buttetin stating that in some 2012 Wranglers there might be casting sand in the engine and heater core. The dealer is at this moment taking apart the dash, replacing the heater core, flushing the system. 9 hours of time. I have to take the bus to work....
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Old 01-16-2014, 12:09 PM   #7
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Can you get me the service bulletin number? I'm currently fighting with my dealer over replacing the core. They reverse flushed it which helped a little but it's not 100%. The ticket is still open (since I took it in twice) and they want me to evaluate it when it gets colder in the next couple of days. If I had a service bulletin number it would help out a lot.

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