Hi all,

My 2007 Hawk STi seems to have a new issue.
After a run with the A/C on, the insides of the windows are fine. Park the car up. Get back into the car after 10 or 20 mins....start the car with the A/C already on, and all the windows steam up on the inside, almost instantly.

Anyone else get this, it it just the colder weather? I've never noticed it before in previous years though?
Maybe the A/C needs a re-gas?

 

Check the coolent levels or if you've left any thing wet in the car like clothing , seem to have a de Ja vue about this .

 

Yes a wet coat or drink spill will do it , I’m guessing it’s probably the sudden change in outside temp as my truck and missus truck is doing the same.

 

Mine does it this time of yr, getting in the car with wet feet if it's been raining will make the windows fog up after a while.

 

Do you run your A/C on outside air or in recirc mode?

 

I've only really taken it out in dry weather, foggy tonight though. Not wet clothing etc,.
I run it on outside air, not recirc....

 

Carpets are dry, and around heater matrix is dry, no sweet smells etc.

 

Cold air outside would be my guess ,

 

That's what I'm hoping, just never had it in previous cold weather....

 

This always happens to me too.

my theory is:

I’m out driving with hot air on, because I like it when it’s toasty, and breathe and add loads of moisture to the air (which it can hold fine, because warm air holds more moisture than cold). Everything is fine because my windows are above the dew point (because I’m blasting hot air).


Then I park up for a bit, and the windows go cold, and therefore they become colder than the dew point, but not a lot of water condensate on them, because there’s not a whole lot of air movement inside the car.

now I jump back into the car and the fan moves all that lovely moist air across the cold windscreen, and the warm air turns cold, and the water vapour becomes dew (which you are as mist).

 

I think that's spot on Henrik.

 

Might be worth changing pollen/cabin filter

 

Maybe, I guess it's only about 8 months ago I did that, but they do fill up with debris very quickly for me as a lot of trees here.

 

I noticed the same actually. I think it's cold windows and the first waft of air from the air conditioning seems to contain enough moisture to fog up a bit but it clears quickly. I'd think it's normal but haven't regassed the aircon or changed the filter recently. A great tip to keep the moisture in check is putting a moisture trap inside the car, especially if not driven regularly.

 

My old man always sticks them silica gel bags in his caravan during the winter and they seem to work well

 

Cat litter in a old pair of tights foot or sock works, and easy to refill,

 

always found the stench of Cat Pi&& and Shoite put the passengers off their stride a little..........