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Old 04-22-2013, 12:17 AM   #1
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2012 JKU auto climate question

When I turn my JKUs temp to max heat, fan to max (or auto), and the location to auto I get no air blowing from my front vents (towards driver/passenger torso area). Is this how other auto heat functions?

I ask because I has my Jeep in to service my heater mid winter and cannot for the life of me remember if warm air blew from those vents or not when on auto. I THINK it used to but want to be sure before I complain.

I was hoping someone could test theirs and let me know how it works. Thanks.

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Old 04-22-2013, 06:49 AM   #2
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I can test mine and see, but that actually sounds right. Heat will rise, so by putting it out on the floor vents, it will warm your feet as well as the whole Jeep and rest if you as the warm air rises. If you put it out at the vent level, you won't get much around your legs and feet as far as warm air.

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Old 04-22-2013, 07:46 PM   #3
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I have had several vehicles with auto climate control, American, Japanese and German.

All of them always heated on floor mode. The idea behind that is if your feet are warm you are warm. It's better for the air to be really hot at your feet and cool slightly as it heads towards your head as this keeps you from overheating. The American and German vehicles would cool on floor and dash with less air coming from the floor. The idea here is reversed. Cool air towards your core and face will make you feel cooler faster. Cool feet are less necessary.

The Japanese vehicles just always put air out towards the floor unless you manually changed it not to. On the German and American cars I have had, changing where the air flows doesn't keep the system from controlling the temperature or fan speed. The Japanese cars would control the temperature and fan speed only if the mode was set to auto. If I directed the air to the dash I had to use it as a manual climate control with a fancy display and steering wheel buttons.

So the Jeep follows the normal American convention for auto climate control and you have nothing to worry about. I personally prefer manual control since I override automatic controls most of the time and I feel like I'm fighting it. That is just preference though.

I like to heat with about 70% of the air going toward the floor and 30% blowing from the dash, opposite for cooling. You can easily achieve this by setting your temperature dial to what you want, your fan to auto and put the mode in between floor and dash and dash.
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