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Thread: Misting up

  1. #1
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    Misting up

    Can anyone shed any light as to why my Passat keeps misting up all the time? We left the car tonight for 10 mins to run into a shop and on our return it is all fogged up inside. Takes a while to clear it too. It happens a lot, what could be causing it?

    Thank you
    2014 Passat Saloon Sport 2.0 TDI-CR 177PS

  2. #2
    Administrator Crasher's Avatar
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    IT could be a blocked AC drain which is behind the centre consul right side trim. Do you run the system on auto or ECON?
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  3. #3
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    When it's misty Max Windows sign on which puts the AC to max
    2014 Passat Saloon Sport 2.0 TDI-CR 177PS

  4. #4
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    In the right (or should that be wrong) conditions vehicles with large front screens, like Passats and Tourans are prone to misting up very quickly when stationary, I think this is due to rapid cooling of the glass causing warm (and wet) air flow out of the screen vents which then condenses on the screen. I try and remember to set the air flow to footwell when I park and this very often prevents the problem.

    The other thing is to ensure that recirculate is switched off, when its on the air in the car is just getting wetter and wetter due to the passengers exhaled breath. Max demist reuires the face level vents to be closed with air con on and max heat, also having the rear door windows open say 10mm each side will draw the air through the car.
    2013 Touran 2.0 TDI (CFHC - D91) SE DSG (PBF -G1A) Acapulco Blue Metallic, Retro Fit Front Fog lights, Westfalia Detachable Towbar
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  6. #5
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    I do that and it clears the windows, however they are misting up whilst driving sometimes. Also if the windscreen is clear and I get out of the car to go into a shop for 10 mins I come back and the car is misted up again while other cars on the street are clear.

    I never had this with the Volvo, ever! Only the Passat
    2014 Passat Saloon Sport 2.0 TDI-CR 177PS

  7. #6
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    You realise that its illegal to leave the engine running in an unattended vehicle?

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