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Windows fog up too easily

Did your F150 have climate control? Cars with full climate control can sometimes be tricky because they're doing things in the background you may not expect.

Secondly, running with the AC on (whether blowing hot or cold) reduces fogging, and given the AC uses a fair bit of power, I wouldn't be surprised to hear it uses the AC sparingly and is prone to fogging.
 

mknox

Well-Known Member
Aug 7, 2012
10,104
1,898
Toronto, ON
"Nicer" cars are usually better sealed (more airtight), so it allows you (and other passengers) the ability to quickly fog up the windows.

I dunno. All of my "nicer" and well sealed cars have not had fogging issues. To my casual observation, it seems like mostly Civics and Corollas have fogging problems, at least in the winter.

I have found keeping the car off "recirculate" (i.e. on outside air) and keeping the fan speed relatively high aids in reducing the fog problems, even if not explicitly set to "Defrost" mode.
 

ken830

Model S 85, Model 3 Performance
Jun 19, 2012
1,140
382
San Carlos, CA
I dunno. All of my "nicer" and well sealed cars have not had fogging issues. To my casual observation, it seems like mostly Civics and Corollas have fogging problems, at least in the winter.

I have found keeping the car off "recirculate" (i.e. on outside air) and keeping the fan speed relatively high aids in reducing the fog problems, even if not explicitly set to "Defrost" mode.

I was merely pointing out the fact that fogging windows is caused by the excess moisture in the car (produced by passengers breathing) condensing onto the inside of the cold window (cold exterior temps). If cold, dry air is allowed into the vehicle, either by the HVAC system, or by "leaky" seals, then there will be less fogging. Your previous "nicer" cars just probably managed it better via the HVAC systems than your Civics an Corollas with manual controls. But if you turn off the HVAC, you'd definitely find more fogging in a better-sealed car. It's just physics. Which is a likely explanation of rdrcrmatt's experience in the OP.
 
No didn't know that was a thing.


And the F150 didn't have climate control.. all manual. The Grand Prixs did though.

i requested the new vented defrost panel for the windshield, it made all the difference, a little more glare in the windshield on sunny days, however. The SC put it in for free.

- - - Updated - - -

> trips with two adults, two kids and two labradors [MS]

Ah, to cruise by Home Depot early in the morning in the MS looking for laborers, now that's Class! :rolleyes:
--

you make me laugh!
 

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