Condesnation proble...
 

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[Closed] Condesnation problem in my new car... Anyone got any ideas???

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 mboy
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Just picked up my new (to me) car a week or so ago now. Anyway, it's in great nick, FSH, every receipt, old MOT and everything with it...

Only problem... For some reason, and I don't know why, and I don't know how to solve it, but it has the world's worst condensation problem in the mornings! OK, I know it's January, but we're talking a need for windscreen wipers inside the car here!

Any ideas to fix it?


 
Posted : 19/01/2011 10:18 pm
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Got a leak somewhere?

Try leaving a bunch of old newspaper in the boot etc to soak some of the moisture out of the air. A couple of sheets on the mats will soak up some of the moisture from your shoes to help keep it dry. If it has air-con, run that, as the air in the car will then be drier.


 
Posted : 19/01/2011 10:21 pm
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My wife's company car is like that (new shape civic). At the last service the main dealer said it was probably clogged pollen filter, but unhelpfully didnt bother changing it 🙄

Either that or you have a leak somewhere?


 
Posted : 19/01/2011 10:23 pm
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Stop tekkin fat lasses out for chips.


 
Posted : 19/01/2011 10:23 pm
 cozz
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its leaking or maybe it had been valeted before you got it and carpets are stil damp

drive everywhere with heater on and maybe leave windows open a crack if we get a sunny day


 
Posted : 19/01/2011 10:24 pm
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I go with moisture left over from valeting.


 
Posted : 19/01/2011 10:25 pm
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Really dull answer - turn the air re-circulation off?

[img] [/img]


 
Posted : 19/01/2011 10:26 pm
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The main problem we find in the motor trade that cause this problem is a water ingress to the interior. What make and model car do you have, check under all the carpets and in the boot around the spare wheel for signs of water. Also if you purchased the car from a garage, it may of just had a full valet including washing the carpets, so they may still be damp causing this. With out inspecting the car it's hard to say why. Using the air-con will clear the screen quicker than normal.


 
Posted : 19/01/2011 10:27 pm
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Crikey- 😆


 
Posted : 19/01/2011 10:27 pm
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Had the same problem recently.

Problem was a leaking seal in one of the rear doors. Not always easy to track down but check for damp carpets after rainy conditions and inspect all the door and window seals.

All sorted now.


 
Posted : 19/01/2011 10:28 pm
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remove damp riding kit from it?

Need to get it to a dry state to see if it reoccurs. Heaters flat out, don't recirculate air, open windows a touch. A few journeys of this seem to have sorted the GF's corsa recently, so must have just been snowy feet at Christmas soaking the carpet under the mats.


 
Posted : 19/01/2011 10:28 pm
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Plenty of newspapers on the floor, and under the seats to soak up the moisture,look in the rear wheel well under the rear wheel for a puddle of water, also it may have been in a flood, lots of cars affected and then sold on quick.
Look for mud under carpets,and in rear wheel well.


 
Posted : 19/01/2011 10:45 pm
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Check the rubber's around the rear lights,had the same problem, changed rubber seals around one light, prob solved. Also the water channels outside the car get block, just blow them out with air.


 
Posted : 19/01/2011 10:52 pm
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I used to get this in my Espace, and now in a Multipla. I suspect it's because I have removed the excess seats which absorb any spare moisture.


 
Posted : 19/01/2011 10:56 pm
 Olly
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spraying down two bikes in cwm carn last weekend, and slinging them straight in the back of the car will do that 😀

on your commute, get the car hot hot hot (35 degrees hot) and once your cooking your uncoockables off, open the window a crack to get some of the humid air out.
do it for a week or so and it will have dried out 🙂


 
Posted : 19/01/2011 11:02 pm
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Mine has a cracker - totally random (well, obviously not but not a pattern I can identify) inches of water in the drivers footwell, after rain, and independant of parking inclination. Here's my thoughts and process...

Normally I'd blame either the sunroof or assume I'd got a blown heater matrix (two major likely events) but I've not lost any coolant and I've no sunroof.
Door seals seem to be intact and carpets dry above.
Windows and scuttle panel take water away without dripping it inside.
Door drains are clear and water isn't backing up inside the door skin.
Antenna seal fine.


 
Posted : 19/01/2011 11:08 pm
 mboy
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Cheers for the responses guys. The car in question is a 1999 VW Passat Estate.

Will check the pollen filter tomorrow, didn't think to do that actually! Fortunately it's bloody easy to change on my car so will only take 5 minutes.

So far, I have been getting the car toasty hot on every journey, then opening the windows a smidge to let the humid air out. Obviously leaving some wet riding kit in for a day didn't help! But that's out now, and it was like it before...

No signs of water ingress into the car, or flood damage etc. Bought the car from a guy who lived out in the sticks, in a hilly area, so not likely to have been in any floods.

Cheers again, will see if the above will get me anywhere...


 
Posted : 19/01/2011 11:50 pm
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Cheers for the responses guys. The car in question is a 1999 VW Passat Estate

Uh oh. The most likely cause on the Passat is blocked drains in the battery tray. It'll collect about 5cm of water, then start depositing it into the bulkhead past the brake servo seals, from where it will collect under the driver's seat and in the bulkhead insulation. Even if it's not the worst-case scenario - and I hope it isn't - the water in the battery tray can be enough to cause some terrible condensation.

Do a Google for 'passat water ingress' and check out [url= http://www.weirdlittlebiscuit.com/passat/leak/index.htm ]this article[/url].


 
Posted : 20/01/2011 12:04 am
 mboy
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Three Fish

Brilliant mate, cheers for that one! Will whip the battery out after work tomorrow


 
Posted : 20/01/2011 12:23 am
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Assuming you have it (and along similar lines to tankslapper):

Do you turn off air con/climate control before turning off ignition, and can you hear the vents close?

Parent's Octavia suffered from really heavy misting, turns out they had the air con on all the time and the vents didn't close when the ignition turned off. Once problem was found turning off air con before ignition sorted it.

Maybe post a pic of the control panel if you're not sure.


 
Posted : 20/01/2011 12:36 am
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Really dull answer - turn the air re-circulation off?

They automatically turn off when you set the fan to demist the windscreen.


 
Posted : 20/01/2011 12:41 am
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Check there is no holes under the carpets that meant to have though's rubber gromites in.
Also check leaves have not got into the vented grill bit on the bonnet sometimes that can cause a problem.


 
Posted : 20/01/2011 12:43 am
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Lifer - that sounds like my octavia - I am going to give that a go and see if it improves things


 
Posted : 20/01/2011 8:04 am
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When you open the doors after it's been raining does a load of water get released ?


 
Posted : 20/01/2011 8:19 am
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To dry it out go to wilkos and get a chemical dehumidifier that is meant for bathrooms. You might need a couple of packs. Put them in the car for a few days or until they are full.

I had a leaking sun roof on my old XR3i and this really helped to dry the car out. If you put one by the back window and one on the dash at night the windows will be much better in the morning.


 
Posted : 20/01/2011 8:36 am
 hora
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New air filter would be the first port of call.

Which would say to me - when was it last properly serviced.

Another cause (in my cars) are soggy towel/gym kit left in car.


 
Posted : 20/01/2011 8:41 am
 Haze
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My Astra does this, it takes longer to clear the inside than the outside when it's frozen as no-one makes a scraper to suit the inside profile of a windscreen!

I just have to leave the house a few minutes earlier...


 
Posted : 20/01/2011 8:46 am
 hora
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Door drains are clear and water isn't backing up inside the door skin

Can be a real problem if your bought a Passat. My MX5 did this and you have to keep ontop of it as it can lead to rotting out the rear quarter from inside out 😮


 
Posted : 20/01/2011 9:04 am
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As threefish said ^^ this is a known issue on Passats. I learnt the expensive way with a new brake servo as water had built up to such a level I could have put a couple of goldfish in there.

You've probably found out about the drain holes, but also check with your VW dealer if the vehicle qualifies for the recall they did on the model, which would be gratis to check it.


 
Posted : 20/01/2011 9:09 am
 hora
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The car in question is a 1999 VW Passat Estate

Ah just read this bit after seeing rich_tee's post above.

http://www.honestjohn.co.uk/carbycar/volkswagen/passat-1997/?section=bad

Plenum chamber drains block (especially the hard to clear one one under the battery) and seals fail allowing water ingress which can lead to electrical and electronic failures and eventually collects in rear footwell. Check very carefully for signs of water leaks (feel footwell carpets for damp). May be a structural leak, may be a blocked ventilation plenum chamber drain, or may be because the a/c condenser drain pipe is blocked leading to water being dumped into the footwell. Very important to clear plenum chamber drains of leaves as water damage to the ECU can wreck the engine. Apparently this water can be drawn into the brake servo and causes corrosion to the servo housing and brake master cylinder that can result in reduced brake force or failure altogether. Class action about this at http://www.volkswagen-classaction.com/


 
Posted : 20/01/2011 9:23 am
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hora - Member

New air filter would be the first port of call.


Eh? How will charge the air filter result in a dryer car interior? Or have you been deliberately obtuse?


 
Posted : 20/01/2011 9:28 am
 hora
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If a car has had oil changes every year at indie etc sometimes the other essentials are skipped. My Forester was like this- when I pulled the air filter out it was minging and full of grit/odd leaf etc and trapped moisture.

After it was changed another benefit was the heater/vents felt almost hurricane-like compared.


 
Posted : 20/01/2011 9:31 am
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Possibility of it being condensation from the aircon circuit itself, independent of the state of the pollen filter?

The chemical dehumidifiers will help, but will need removing before each journey as the crystals eventually turn to a corrosive liquid, not too good in a moving car.


 
Posted : 20/01/2011 9:36 am
 anc
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As soon as I saw this thread I thought Passat. The B4 and 5's all do this(search VWAUDIforum). As posted above the Plenum chamber drains block and allow water to build up and get in the cabin via the air filter. But also road grime can build up around the bonet hinges and do the same thing. Basically the filter cartridge is a poor design. Its just under the passanger side of the windscreen under the Plenum chamber cover, check it out if the filter is damp you need to remove the cartridge and re-seal it to the car. The water shows itself in the rear passanger footwell. You need to lift the carpets to dry under there this time of year if you leave it the car will start to smell, or better still get the garage how sold you it to do it. Speaks the man with, bitter experience! Binned it off in the end and got the new B6 which doesn't leak but has its own set of common problems.... Bloody VW's!


 
Posted : 20/01/2011 9:45 am
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Do golf's have the same problem as the passat? Mine really suffers from misting.


 
Posted : 20/01/2011 11:29 am
 anc
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Not in the same way but they can have water ingress issues, blocked sunroof drain being a common one. Easy to check it its damp, lift your rear seat and you can see were the floor carpet ends. Loosen it a little and push your hand down under the carpet to the floorpan, if it feels damp you've got a issue.


 
Posted : 20/01/2011 11:44 am
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It is probably not an issue with the car just a build up of snow / wet getting into the car in the last few months from wet shoes and opening the doors.

The recent damper weather has made most people's cars like this at work, everyone is spending 5 mins clearing the car before they leave which is really odd as it is usually like whacky races at 5pm.

Newspaper advice sounds good.


 
Posted : 20/01/2011 11:50 am
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I have an Ashtray that is known for damn moisture, in the summer the air con has to be on so the windows don't mist up.

I use one of these, it lasts about a month and does a pretty good job of keeping the moisture at bay.

[img] [/img]


 
Posted : 20/01/2011 11:54 am
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A car park I go past on my way home at night always has a few cars with what looks like serious condensation problems. Luckily it seems the owners are often present (well, the interior lights are on, often with supplementary candles, which must keep it nice and cosy inside, so I guess they're in) so tonight when I cycle past I'll knock on a few windows and ask them how they deal with the issue.


 
Posted : 20/01/2011 12:32 pm
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coffeeking - have a look at your guttering (for roof rack), may have leak there (least that's what I had in my car when the footwell kept filling up.


 
Posted : 20/01/2011 12:32 pm
 benz
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Passat...

Pollen filter seal.

Foam which rots letting water down...see vents under front seats....potentially water closer to back.

VW apparently do not sell a new seal (under a tenner), only a replacement unit (about £150).

If it is this, get new filter and decent silicon sealer...job done.


 
Posted : 20/01/2011 3:03 pm
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 mboy
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Three Fish, many thanks again... Got the tools out this evening, removed the battery and the battery tray, lo and behold there was a good pound or two of compost underneath the battery tray, much of which was blocking the drains!

So cleared the lot out, poked the drain holes clean, put it all back together etc... Also probably spent almost 2 hours in the car today, all of it with the heater on full blast (opened a window periodically to let some cool air in and the humid air out). Hopefully soon it'll all be dried out carpets aren't wet at least) inside, and I'll probably get one of those chemical dehumidifiers to boost things a bit.

Anything to beat having to scrape the INSIDE of the windscreen again such as I had to this morning before leaving to go to work!!!


 
Posted : 20/01/2011 11:52 pm
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Park it in the sunshine, that'll dry the inside out.


 
Posted : 20/01/2011 11:59 pm
 hora
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A good clean round with anti fungal (bathroom?) Spray would help. Spores etc in a dampwarm enclosed box. My old pug306 had been stood for 2yrs and I had to thoroughly scrub down the interior with this stuff as the spores had actually become visible/grown a lot!


 
Posted : 21/01/2011 7:27 am
 anc
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Under the carpet there is soundproofing which won't dry out this time of year without you lifting the carpets and drying it out with heat. You want to do this if its wet because VW in there wisdom also put the ECU and control systems for the car under there and surprise surprise they ain't keen on the damp conditions!

P.S remember the cartridge that holds the pollen filter is the real problem, unless this is fettled you will get water in again when it rains heavy whether the drain plug is OK or not.


 
Posted : 21/01/2011 8:13 am
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You don't need to keep opening the windows to let the air out! Just run the booster fan on 1 or 2 and it will push the air right through the car and out of the vents at the back. Take out the floor mats, keep them indoors for a couple of days to dry out and if possible this weekend park the car somewhere sunny or breezy with the doors or the windows open. Always have the fan running on 1, it's amazing how many drivers still think the fan is for quick demisting jobs only; you see them peering through steamed up windows and wearing coats and hats in the car.... mostly the older drivers.

Oh and if your windows steam up easily, give them a really good clean inside. Most people don't realise that the grey film on the insides of the windows is plasticiser that has migrated out of the trim; it's the last problem the motor industry has never solved. The film attracts moisture and causes the windows to mist up much more readily than when they are clean.


 
Posted : 21/01/2011 8:47 am