Fogging windshield

[Tom Reingold]

I do just the opposite, and I never have had a problem. My theory is
that if you recirculate cabin air, the air conditioner will dry it out.
If you bring in fresh air, you will bring in moisture with it, so the
air conditioner has more moisture to deal with.

But your theory is wrong, because a car with people in it is more humid
(humider?) than the outside, even when the outside is very humid. You
may get away with your practice when you have no passengers, but add a
person or two, and you will notice a big difference between fresh and
recirculated air. In three minutes, you won't be able to see out the
windows with recirculated air.

 

[Tom Reingold]

Thanks everyone for all the ideas. I've never had to top off my coolant level so I
don't know if that proves whether there is no leak or not. I've never had any odd
coolant smells inside the car. I'll check the filter and clean the windshield on the
inside.

Adam

And when you solve the problem, let us know what did the trick!

 

[Michael Pardee]

So it's a cold morning and I've just started the car, turning on the
Defrost at
the high heat setting to clear the windshield and warm myself up as well.
I've
just turned on the A/C ? ?

Yes - unless the outside air is too cold for the compressor to come on
(usually around 5 degrees C). The engineers figure if you select "defrost"
you want the maximum in windshield clearing power.

Mike

 

[Michael Pardee]

But your theory is wrong, because a car with people in it is more humid
(humider?) than the outside, even when the outside is very humid. You may
get away with your practice when you have no passengers, but add a person
or two, and you will notice a big difference between fresh and
recirculated air. In three minutes, you won't be able to see out the
windows with recirculated air.

I wish I had put it that clearly.

Mike