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HVAC Recirculation question

Old Sep 22, 2013 | 06:35 PM
  #1  
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Default HVAC Recirculation question

Was doing some research on the cabin filter, a found this short vid:

http://www.youtube.com/watch?v=lzSiWLu2q4o The mechanism confused the heck out of me. So here's some questions. I hope some of you smarter folks can enlighten me...


Does all air get filtered, recirculating or fresh?

Where does the jeep suck air from to recirculate it?

What's the purpose of the thing opening (when recirculating) and closing (when not)?

Could I soak my cabin filter in some air freshener, allow to dry, and then stick it in there for optimum air freshness?

Last edited by brah; Sep 22, 2013 at 06:41 PM.
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Old Sep 22, 2013 | 06:44 PM
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Video did not work for me. I believe the filter only filters outside air, and in the recirc mode the out side air is blocked and you are only cooling the air that is in the cabin already.
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Old Sep 23, 2013 | 05:26 AM
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On our X i had to install a filter since never came with.Works well keeping the dust out
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Old Sep 23, 2013 | 06:05 AM
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The filters work on inside and outside air.

It draws air from behind the glovebox.

It takes two of the following:

Purolator C16177
Wix 34302
Mopar 55111302AA

If your Jeep had Automatic air, it comes with a set. If not, you have to add them.

Pinch the back of the glove box in and it will come out. There are two doors behind it that let you access the filter rack. The air flows down through them so set them in with the flow arrow down.

If you soak the filters, I think they would come apart. There are some other brands that are carbon impregnated.

This link explains it better.

http://www.tmar.net/cabin-air-filter...ed-filters.htm
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Old Sep 23, 2013 | 06:07 AM
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Oh, I forgot!

If the air diverter is down it will cover the filter rack. Turn on the fan and set the ac to recirc.
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Old Sep 23, 2013 | 06:17 AM
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Default soak filters

don't do that. they will just rip and or clog.

I put these in all my vehicles. Change them yearly. you'd be amazed how dirty they get and much cleaner your lungs will be.
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Old Sep 23, 2013 | 06:44 AM
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We use BG Frigifresh to remove "unpleasant odors" from the hvac system. Hope this helps.

Click image for larger version

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Old Sep 23, 2013 | 12:00 PM
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The operation and install has already been covered, but no, I would not soak the filter in anything smell-freshy as it will probably destroy/warp the filter and the smell might change or trap moisture.

The goal is to keep particulates out of the air blowin into the cabin, not make it smell good or kill any bacteria, etc. Your Jeep's HVAC system is not to be used as a precaution or defense against chemical weapons! lol
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Old Sep 24, 2013 | 07:41 AM
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Thank you all for the replies.

My local Autozone/Advanced Auto Parts don't carry the cabin filter
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Old Sep 24, 2013 | 01:47 PM
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Originally Posted by brah
Thank you all for the replies.

My local Autozone/Advanced Auto Parts don't carry the cabin filter
Here's a link.

Amazon.com: Wix 24302 Cabin Air Filter: Automotive
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