S70 windshield fogs up

For some reason my S70 windshield is fogging up like crazy. When I put
on defrost mode (which switches A/C on) it actually makes the problem
a little worse for a while (like good 10-15 minutes). I started to
wipe the windshield, but again, that does not help much, especially if
A/C is running on defrost.

Checked the floors in the car - they are dry. Someone mentioned that
I need to check that my A/C outlet (the place where the water is
released) is not clogged, but I have no clue where that is (checked my
Chilton guide)...

Any idea why this might be happening and how to fix it?

 

You may have a leaky heater core, does the engine lose any coolant?

The AC drain is a good thing to check too, unfortunately I don't know
where it is on your car either.

 

Make sure it isn't in "recirculate" mode.

 

I had once the same problem, when the pollen filter apparently was flooded
because of clogged water draining outlets ib the area under the screen. It took
some time until the incoming air had dried the filter. Another symptom then was
also that when taking in air from outside, the air stream from the jets inside
was much weaker than usual. After opening up the clogged 2 draining hoses the
problem was gone.
Franz47

 

Franz,

Could you please tell me where the pollen filter is - is it the same
filter as the cabin air filter (under the hood close to passenger
side)? And were the drain hoses are located? I'll check it in my car.

Thank you,

Henry

 

Franz,

Could you please tell me where the pollen filter is - is it the same
filter as the cabin air filter (under the hood close to passenger
side)? And were the drain hoses are located? I'll check it in my car.

Thank you,

Henry

 

side)?

I have an 850 TDI station wagon, so I am not sure about the position of the
filters in the S70. Here they call the air intake filter also pollen filter, so
I used this expression. Yes, it is under the hood in the area between lower
border of the windscreen and the barrier to prevent water go into the engine
compartment. There is a lid, which can be removed, therunder the pollen filter.
The draining hoses are attached to two draining holes right an left where water
drains to from the screen. Pouring a bit of water should show the way where it
wants to go to find the holes. Several times a year I have to open them because
they get clogged by debris.

Have you tried www.matthewsvolvosite.com ? There might be useful info on your
car there.
Franz47