Misting car

Discussion in 'Leon Mk2' started by RichyFR, Dec 19, 2017.

  1. RichyFR

    RichyFR Full Member

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    I've got a pre-facelift MK2 FR which this year has caused me a lot of grief with all windows misting up. It doesn't matter what I put on them (rainX, autoglym polish, nothing) they still mist up by the end of the day and first thing in the morning (I've even got a dehumidifier thing in there).

    Last night i got into my car and after 5 or so minutes all my windows had cleared and I was ready to go...

    After driving for 20 minutes or so my entire windscreen steamed up within seconds and I was forced to pull over and wait for it to clear.


    I don't recall having any issues last year and the only things I've changed this year is:
    - Taken the clips off my wind deflectors because the glass kept catching
    - Changed my pre facelift climate control for a facelift

    I know I'm not alone... what have people done to resolve this issue? Is it a seal or could it be the change of climate control instrument?
     
  2. brian1912

    brian1912 Full Member

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    I always thought my Civic was bad but my copa is bad seems to take ages to clear I run with my a/c on all the time I’ve checked for water ingress can’t find anything could be I need to change the pollen filter or maybe as simple I’m going in the car wet or with wet feet



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  3. RichyFR

    RichyFR Full Member

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    All my carpets are bone dry and I recently changed my pollen filter with a genuine VW one. Maybe it's something as simple as a defective filter?
     
  4. brian1912

    brian1912 Full Member

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    Not a clue richy I’m putting mines to the damp wet weather here in Glasgow


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  5. cupra_ahhh

    cupra_ahhh Senior Member

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    Is it more misty this time of year of has it been consistently steaming up? It's odd that you can clear it, and as you're driving it starts to mist up.

    Is your air con fully functioning? Do you switch it on to help de-mist the windows more quickly?

    When did it start happening? Is there any pattern to it, i.e are there times when it doesn't mist up at all?
     
  6. RichyFR

    RichyFR Full Member

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    I usually stick the controls on auto with AC on constantly.

    Some times it will stay clear but yesterday and today it has misted up and I've had to put the blowers on the windscreen to clear it.

    Perhaps I need to check the wiring behind the controls.
     
  7. brian1912

    brian1912 Full Member

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    Maybe your a/c out of gas


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  8. RichyFR

    RichyFR Full Member

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    I hope not. I had it re-gassed on 24/12/2016.
     
  9. brian1912

    brian1912 Full Member

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    Depends how much you use it ?


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  10. cupra_ahhh

    cupra_ahhh Senior Member

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    hmm yeah I don't know how long the AC gas lasts, but if you keep it on the entire time, that will obviously use more. How many miles do you roughly do in a year? It may be worth taking it somewhere where they can simply check its performance.

    Could well be that it's low, it starts off fine and then loses puff, hence why your windows are suddenly steaming up.
     
  11. brian1912

    brian1912 Full Member

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    Going to sound daft but what’s the outside temp is it not the case also if it’s below a certain temp the A/c won’t kick on ?


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  12. cupra_ahhh

    cupra_ahhh Senior Member

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    True, I think if it's 5 degrees or less it won't switch on. I don't know if it will turn itself off if the temperature drops while the AC is on.
     
  13. Darbo

    Darbo Full Member

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    Mine did this a lot last year, just randomly steaming up while I'm driving, realised yesterday though that it's been pretty good this winter, I read somewhere they were prone to it and like you my carpets are dry, no water ingress, it's definitely coming from blowers.
    Maybe moisture building up in the system instead of draining.
     
  14. cupra_ahhh

    cupra_ahhh Senior Member

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    RichyFR, you sorted this yet? Was it the air-con gas?
     
  15. RichyFR

    RichyFR Full Member

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    Hi cupra_aaah,

    I've not really had an issue with it up until this morning. I put it down to the fact I'd not used the car in a few days.

    I've not had the aircon regassed - it's working fine whenever I test it (over 5c).

    I did dry out the boot carpet, perhaps that had something to do with it? it got really wet when it snowed and all the wet stuff went in the boot.
     
  16. GordieC

    GordieC Full Member

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    A healthy AC system doesn't consume gas. Gas is lost through leakage and if there is a leak present, you will lose it regardless of how much or how little you use the system. In fact, you are less likely to lose the gas by using it often as this ensures regular circulation of the oil in the system which prevents seals from drying out, leading to leakage.
     
  17. Rob66

    Rob66 Full Member

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    Mine has done this the last few days, taking about 5 mins to clear this morning with A/C on full with the recirculation on as that helps. Our Ibiza is similar, not sure if it's the cause but neither have great seals along the lower door strips, you can tell the seal is poor as the sills great dirty quickly when driving in the rain.
     
  18. richicupra

    richicupra Senior Member

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    Mine mists up like crazy, as did the previous pre-FL Cupra I had. If I clear it with the A/C then switch it off it just mists up again straight away.
     
  19. andycupra

    andycupra status subject to change

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    humidity.
    cold air can hold less moisture, so as the temperature drops the relative humidity increases.
    if you are getting misting up issues this is a natural occurrence, but it can vary car to car and you can influence it to an extent:

    If there is anything wet in the car, this will cause issues, - so any water leak, wet carpets etc.
    if you are wiping the screen with a cloth and leaving this in the car that wont help...

    If you have the car nice and warm when you are driving, then it may well clear as the relative humidity drops. but when parked the air temp drops and the relative humidity increases...

    So clear out anything wet, don't leave any wet rags in the car, that wet coat or wet umbrella, sort out any leaks, stop breathing... ;)
    consider turning off the heater when you are near your destination and opening some windows to give it a blow out, hopefully this will reduce the humidity in the car which can help, - although ultimately it comes down to changes in temperature and humidity.

    another approach is air circulation, to increase this, but its not an easy thing to do without leaving window open...
     
    #19 andycupra, Jan 3, 2018
    Last edited: Jan 3, 2018

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