1. Offline

    steevr New Member

    Member Since:
    Mar 30, 2008
    Message Count:
    36
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    Location:
    Illinois
    Your Vehicle Year:
    2009 Prius
    Whenever the temp is below freezing and I've driven the car for awhile and then park my car to go into a store,etc., when I come out, the inside of all the windows are always fogged. We own two Lexus's, both with the Toyota Auto Climate control and never have this issue. Has anyone else experienced this with their Prius?
  2. Offline

    john1701a Prius Guru

    Member Since:
    Jan 6, 2004
    Message Count:
    5,517
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    970
    Location:
    Minnesota
    Your Vehicle Year:
    2012 Prius Plug-in
    Model:
    Plug-in Advanced
    Nope, never here in Minnesota. Of course, I don't use the recirculate feature. Do you? Moisture from your own breathing will build up if fresh air from outside isn't brought into the cabin.
    .
  3. Offline

    hill High Fiber Member

    Member Since:
    Jun 23, 2005
    Message Count:
    7,156
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    660
    Location:
    South OC So Cal & the Flathead Valley MT
    Your Vehicle Year:
    2004 Prius
    Model:
    N/A
    +1
    I love the power of the Prius defrost, even in our ol' antique 2004. Best I've ever had.
  4. Offline

    qbee42 My other car is a boat

    Member Since:
    Mar 2, 2006
    Message Count:
    17,755
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    2,805
    Location:
    Northern Michigan
    Your Vehicle Year:
    2006 Prius
    Model:
    N/A
    Set it on Auto, make sure the A/C compressor is enabled, and outside air is selected.

    Tom
  5. Offline

    effwitt Paparazzi Magnet

    Member Since:
    Jul 28, 2007
    Message Count:
    225
    Likes Received:
    6
    Location:
    Eagan, MN
    Your Vehicle Year:
    2007 Prius
    If I'm driving alone in the winter, I roll the passenger-side windows down a few inches during the last minute or so to exchange the dryer outside air with the more humid air inside the car. This reduces freezing on the inside of the windows while you're parked.
  6. Offline

    Prius_SGP New Member

    Member Since:
    Apr 13, 2008
    Message Count:
    58
    Likes Received:
    2
    Location:
    Saint Genis Pouilly, France
    Your Vehicle Year:
    2008 Prius
    Hi,
    I also have had this problem a few times. I agree with QBEE42 and Effwitt. Using the outside air intake and when necessarry opening the passenger widows a little does help alot.

    I've found that this generally only happens when the temp is just on the cusp of freezing and and hitting - figures(°C). As mentioned above try to resist recirculating the air, I managed to freeze the inside of the windshield once by forgetting to switch off the recirc......
  7. Offline

    snead_c New Member

    Member Since:
    Nov 18, 2008
    Message Count:
    606
    Likes Received:
    45
    Location:
    Hendersonville
    Your Vehicle Year:
    2009 Prius
    No, I've not had this problem. I'll play with the air recirculating system and try to duplicate.
    The suggestions about fresh air etc seem sound.
  8. Offline

    The Ericsons New Member

    Member Since:
    Feb 21, 2005
    Message Count:
    59
    Likes Received:
    0
    Location:
    Illinois
    Your Vehicle Year:
    2010 Prius
    Model:
    III
    We have always had a problem with window fogging in the 2010, especially at the driver's side corner around to the side window. Bought the car in November before the temperature was very cold and have continued to have the problem no matter the temp outside. We never encountered it in our 2005, so there must have been some changes made to the configuration of the system. Have tried all modes and still have to periodically open the window (COLD in ILLINOIS in the WINTER!) to clear it. Passenger needs a blanket. Miserable and frustrating problem.
  9. Offline

    richard schumacher shortbus driver

    Member Since:
    Mar 27, 2004
    Message Count:
    7,384
    Likes Received:
    760
    Location:
    United States
    Your Vehicle Year:
    2004 Prius
    Model:
    N/A
    With outside air on all the time it still fogs? Sounds like a fault with the air system. Have it fixed under warranty.

    As for the rest, next time take a test drive before buying :_>
  10. Offline

    cmikel New Member

    Member Since:
    Feb 25, 2010
    Message Count:
    5
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    0
    Location:
    Arkansas
    Your Vehicle Year:
    2005 Prius
    Model:
    N/A
    Anyone tried Fog-X on their window? I'm not sure how often you have to apply it but it has worked for me on other cars. I have not had my Prius long enough to see if fogging is going to be an issue but I know the Fog-X product is inexpensive.
  11. Offline

    comatoes New Member

    Member Since:
    Jun 2, 2011
    Message Count:
    128
    Likes Received:
    4
    Location:
    MD
    Your Vehicle Year:
    2007 Prius
    Model:
    II
    BUMP .. the last post
  12. Offline

    fulltank New Member

    Member Since:
    Oct 13, 2011
    Message Count:
    229
    Likes Received:
    37
    Location:
    Arkansas
    Your Vehicle Year:
    2011 Prius
    Model:
    Four
    My windows fog up now and then but both front and rear defroster/fogger seem to work very quickly.
  13. Offline

    comatoes New Member

    Member Since:
    Jun 2, 2011
    Message Count:
    128
    Likes Received:
    4
    Location:
    MD
    Your Vehicle Year:
    2007 Prius
    Model:
    II
    I cleaned the inside of my windows with Windex and I replaced the cabin air filter (which was extremely dirty) and now my windows don't seem to fog up as much. I also applied Rain-X to the outer windows, but I don't think that contributes.

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