Foggy windows despite AC On (Fixed)

[nulled]

Today, while driving through a tunnel, windows got super foggy, despite having the AC set to Auto. I had to blast the defoggers. It’s the first time this has happened to me, and I think it might be a software bug. I wonder if anyone else has experienced it.

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[PrudentOcean]

It really depends on the tunnel and the ambient conditions. The air inside the tunnel may be substantially warmer than the air outside the tunnel due to radiant heat from the rock and heat from passing vehicles, any it may also be humid due to seepage. The warm and moist air would then condense on cool surfaces.

 

[nulled]

Thank you for the explanation! I’ve spent the past few years driving around Portugal, but this is my first time navigating mountain roads, so the whole tunnel situation is completely new to me.

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