Here's mine. Snowing out but none on the roof, heat on low and not circulating and no moisture under the carpets but the roof gets condensated

 

I haven't had that happen yet, that doesn't sound quite right.

 

You mean not recirculating?
How about the rear vent? Unobstructed?

Could be a blocked HVAC drain. That would keep water in the plenum.

Other than that, I don't know what the difference is, then. Mine has never even hinted at doing what you guys describe, even with 4 people inside.

 

Correct sorry typing on a phone. Not sure why it happens but its a 2012

 

This happens for the same reason why you see your beer can sweat in the summer. Cold air holds less moisture than warm air. The temperature gradient between your freezing hardtop and the warm air inside your Jeep causes the condensation to form.

 

The science behind it is known. The question is why do some JK's condense water on the roof, and others don't.
Mine never has. People are suddenly posting that it happens to them frequently.

 

Exactly, I know how it happen, I'm just wondering why only on some

 

could this be a model difference ... more insulation in one than the other?


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Maybe, mines a 12 JKU Rubicon

 

i'm having the EXACT same problem as db1