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Old 11-10-2014, 08:21 AM
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De-frosting issues

Since the temperature dipped below 0 I'm having issues keeping my side windows clear. The driver window and passenger window have a hole that stays clear but the back has a layer of ice. Front window is perfect.. Seems to get worse the longer I'm drivin in my jeep...

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Old 11-10-2014, 10:05 AM   #2
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Welcome to the forum. What model and year is your wrangler?

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Old 11-10-2014, 11:04 AM
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its a 2011 2 door sahara!

i thougth i saw somwhere on the forum could be due to refrigerant being low? also wondering if maybe it has something to do with how the top was put back on after the summer?
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Old 11-10-2014, 11:08 AM   #4
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The rear defrost is a totally different system than the front windows. Is your harness on the hard top plugged in? Also make sure depressing the rear defrost button on your ac controller.
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Old 11-10-2014, 11:34 AM
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the rear window is perfect when the defrost is on.. it's the side windows that build up..
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Old 11-10-2014, 11:50 AM   #6
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Originally Posted by MCoops View Post
the rear window is perfect when the defrost is on.. it's the side windows that build up..
Sorry, just realized you meant back of the side windows. I don't know what would cause the heat not to spread over the window, other than extreme cold or blockage. Seems it is hot enough if it is melting part of the window though.
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Old 11-10-2014, 12:35 PM
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yeah whats weird is i dont remember this happening last year..
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Old 11-10-2014, 12:39 PM   #8
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Edited: I thought you meant rear window as well.
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Old 11-10-2014, 01:01 PM   #9
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Do you mean the inside of the glass? If so, I am thinking the AC isn't on(or functioning properly), which would remove most of the moisture from the air, because you are putting out a lot of moisture just breathing inside while driving.
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Old 11-10-2014, 01:31 PM
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Do you mean the inside of the glass? If so, I am thinking the AC isn't on(or functioning properly), which would remove most of the moisture from the air, because you are putting out a lot of moisture just breathing inside while driving.
yes the inside of the glass! and yes i do notice it gets worse when i'm in the jeep.. anything i can do or i should just bring it to a garage?
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Old 11-10-2014, 01:36 PM   #11
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yes the inside of the glass! and yes i do notice it gets worse when i'm in the jeep.. anything i can do or i should just bring it to a garage?
Mine sits in Auto all the time, if yours has an Auto feature I would check to make sure its on that setting. But I think you can force it by using defrost mode on the HVAC, not sure though. Other than that I am out of my league, could always have a shop check the refrigerant level.
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Old 11-10-2014, 01:52 PM   #12
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Another possibility is you may have the recirculate on, which without AC running(or running poorly) would help buildup more moisture inside the cabin.
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Old 11-11-2014, 11:27 AM   #13
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Hi, I don't have AC on mine, mine had a tendency of doing it last winter when -20 and below, two things to prevent it.

1- Make sure you're not on recirculate.

2- Keep the fan speed at about mid-point minimum, if it's getting too hot in the cabin just lower the heat control, don't lower the fan speed. You should be ok.
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Old 11-12-2014, 11:48 AM
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thanks for the tips. i've tried to keep the fan speed up high and bring the temp down if i found it too warm but it didn't seem to make much of a difference.. but i'll make sure agagin it's not on re circulate!
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Old 11-12-2014, 01:26 PM   #15
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There have been some threads regarding blinking rear defroster lights, flaky heat circulation and the like. The source of the problem was a faulty AC control panel. If you are still under warranty it's worth a trip to the dreaded Jeep dealer shop .
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Old 11-12-2014, 01:29 PM   #16
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my rear defroster has blinked from day one when first starting up. It takes a minute or so and then the defroster kicks on. I think it is designed that way due to the way the blend doors work. Has not been an issue to wait a minute until I can kick the defrost on.
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Old 11-12-2014, 01:34 PM   #17
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The only thing that I can think of is that the air is not circulating as necessary for the rear side windows; i.e. the air is not warm enough when it gets pushed to the back. Perhaps you could try aiming the two outer vents or the two inner ones toward the rear past the front passenger area?
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Old 11-13-2014, 08:29 PM   #18
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Clean the windows well (inside). Ammonia free, lint free.

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