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[Lumpy]

I know there has been several threads about this but searched and found no real answers.

Every now and then the inside of the car mists up, even while driving sometimes out of the blue, it happens to a lesser extent on ECO but as the weather is so cold at the moment the AC won't be working anyway. It's almost as if the heater matrix is leaking but it isn't, or the AC condenser is defrosting and the moisture being blasted through the air outlets. Due to the rake of the screen it takes ages to clear as the misting can be quite severe. Hot cold or middle makes no real difference to the speed of demisting when this happens, it's a real pain. I wondered if the AC condenser drain was blocked but can't even guess how to get to it to clear it. All the other drains are free and the pollen filter is removed for now. Any tangible ideas? Never had this on ANY other car unless the heater matrix has blown but it's so intermittent and with no coolant loss the heater matrix isn't a likely suspect.

The only time I have had a worse case is when I drove a military vehicle too deep into a river and the water flowed into and through the heater matrix.

[RobG]

Put the pollen filter back in and don`t run it in ECO mode

[Lumpy]

Put the pollen filter back in and don`t run it in ECO mode

it's just as bad, if not worse not in ECO mode, I'm only running it in ECO to see if it's better. My initial guess was the AC was refridgerating the moisture but if the sensor shut the AC down due to the temperature, this was defrosting and blowing through the car. I would expect the mist to clear quickly if the AC was working. I have recently had the AC recharged to ensure it is in tip top condition as well.

[Bionic]

Is the interior of the car totally dry, including the boot? If not you have acar full of high moisture content to start with and that will, as it does in mine, cause the interior screens to mist up regularly. The hotter it is in the car, the higher the humidity and so on. When hot meets cold it condenses and causes misting on the coolest surfaces.
Probably just the weather. I dry mine completely out every few days with an electric fan heater and the windows just barely cracked open to let the humid air out. On mine the boot was the worst culprit.
GudLuk

[alank46]

Hi
Check your recirculation flap.  Maybe its come loose and is arbitrarily opening and closing.  If you are recirculating damp air it will condense out on the screen.  The flap is beneath the pollen filter.
Alan

[duggs]

I have the same thing....DON'T think its anything to worry about...I've noticed it worsens the more heat I have pumping in to the cabin. You can clear it REALLY quickly by opening the window(s) for a short while...it trickles back but a slightly ajar windows tends to sort it.

As the above posters have said....I too am convinced it s a temperature thing....happens more so in Climate Controlled cars i've gathered.

[Lumpy]

Hi
Check your recirculation flap.  Maybe its come loose and is arbitrarily opening and closing.  If you are recirculating damp air it will condense out on the screen.  The flap is beneath the pollen filter.
Alan

ah yes I have wodered about that as you sometimes do get the musty smell. I frequently push the recyc button and it does change the airflow but no sound of moving flaps liekt ehSenator and Vectra. It happens really quickly when it happens though, it a whooosh and it's there. No feelable moisture in the car or boot, I've done all the checks. Definitely annoying though.

I'll check the recirc flap under the bonnet though to make sure it isn't arbitrarily sticking though.

[sandune]

The solution is to remove as much moisture as possible.
I find that if I crumple newspapers and leave them overnight on the dash and parcel shelf area it soakes
the excess moisture and reduces the misting .
Remove the paper before setting out.

[Lumpy]

The solution is to remove as much moisture as possible.
I find that if I crumple newspapers and leave them overnight on the dash and parcel shelf area it soakes
the excess moisture and reduces the misting .
Remove the paper before setting out.

thankfully the car is mist free in the mornings, it's only when the fans are on it mists up.

[unlucky mark mv6]

Its basically down to the weather,i think just about every car ive had,has been the same in the winter,and tend to find vauxhalls are worse for it for some reason. :-/

[Lumpy]

Its basically down to the weather,i think just about every car ive had,has been the same in the winter,and tend to find vauxhalls are worse for it for some reason. :-/

It's my first I've had problems with apart from the early Asconas I had and you just needed to keeps the fans blasting. I've set the fans on the car to 3rd from fastest instead of auto to keep the flow going.

[rustym95]

if you stop breathing wile driving around it will not mist up, other than that leave the window open abit and dont mist up alot as the condensation on the window from breathing and heater, or run engine for 10min with the heater on before setting off and it should of removed the condensation from the window.  hot breathing on cold window causes condensation:y

[Lumpy]

if you stop breathing wile driving around it will not mist up, other than that leave the window open abit and dont mist up alot as the condensation on the window from breathing and heater, or run engine for 10min with the heater on before setting off and it should of removed the condensation from the window.  hot breathing on cold window causes condensation:y

as I have repeatedly stated it will do it when the car is warmed up and driving along not when the engine is cold etc. The clearing of the misting is very poor due to the rake of the glass. My breathing is not generally heavy enough to cause the issue as the glass is a fair way from my mouth and nose, the rear screen and rear door windows are the same. The whole car mists up in seconds due to an issue with the fans dragging in moisture from somewhere. Thanks for you constructive comments though.

[Entwood]

Does opening a rear window 1/2 " make any difference ?? If it does it might well be that the exhaust vents are blocked. If the air is not exhausted correctly it is the same as having recirc selected .. humidity builds up rapidly.

The actual vents are in the boot, behind the flap on the right hand side. If you have stuffed a load of cloths etc in there it might be the reason.

The air gets from the cabin to these vents through several ways .. check they are all clear.

It sounds to me like a "lack of fresh air" problem causing high humidity. 

HTH

[Lumpy]

Does opening a rear window 1/2 " make any difference ?? If it does it might well be that the exhaust vents are blocked. If the air is not exhausted correctly it is the same as having recirc selected .. hmidity builds up rapidly.

The actual vents are in the boot, behind the flp on the right hand side. If you have stuffed a load of clothes etc in there it might be the reason.

The air gets from the cabin to these vents through several ways .. check they are all clear.

It sounds to me like a "lack of fresh air" problem causing high humidity. 

HTH

opening a window does make it clear quicker, as it would, but worth checking the vents I suppose. Are these the 2 rectangular things at bumper height on the rs?