1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Audi mirrors not demisting

Discussion in 'General Technical / How To' started by timorridge, Dec 19, 2006.

  1. timorridge

    timorridge Member

    Joined:
    Jan 22, 2006
    Messages:
    32
    Likes Received:
    0
    Quick one really guys,

    Got in car to come home from work, side mirrors iced up, back screen iced up. Put demist button on (which does mirrors and back window) Mirrors not demsiting, touched glass stone cold steve austin, usually it is red hot. Back windows clear in 5 mins.

    Just check hand book and fuse 16 under bonnet 30 amp controlls both mirrors and back window, fuse has not blown.

    Any ideas pleeese, could really do with this now it is getting colder.


    Car Audi 80 93'L 2.0E

    Thanks!

    Oh and forgot to say, the electric movement of mirrors is still functional if that helps.
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. Nessy

    Nessy VW + Audi mad

    Joined:
    Oct 18, 2005
    Messages:
    622
    Likes Received:
    6
    Are you absolutely certain that the mirrors are heated only when the rear
    window is switched on?
    I had a '94 80 Avant Tdi SE for 5 years until October 2005 and was of the opinion the mirrors were heated whenever the ignition was on.......
    I bought my car in the summer of 2000 and it wasn't until the cold and icy weather of the winter of that year I realised the side mirrors weren't demisting, purchased 2 Genuine mirror glasses and until I sold the car last year the mirrors functioned perfectly.They were definitely heated all the time, which was a huge boon when driving in the wet in the warmer months as the mirrors cleared very quickly.
    Because this on-all-the-time (early A4's also had this) approach led to mirror elements burning out prematurely Audi changed the way mirrors were heated on the later models, and incorporated a temperature sensor in the back of the glass so the mirror only heats up when ambient temp is low.This means the later cars do not have mirrors that will clear of rain in the wamer months, a right pain I can tell you........
    I would hazard a guess that both your mirror heating elements have gone, if they are the original ones then you are lucky they've lasted so long......
     
  4. timorridge

    timorridge Member

    Joined:
    Jan 22, 2006
    Messages:
    32
    Likes Received:
    0
    think I may have sussed this. Forgot to mention that I replaced the switch to turn demist on because the bulb had failed in the switch (the yellow triangle bit) some months back. The part was off a B3 model Audi 80 (86-90) mine being a B4 model Audi (90-95). Had one of these before and that didnt have heated mirrors, but looked like the same switch. The part was clearly oft the older model.

    I will check that at the weekend and report back.

    Thanks for all replies.
     
  5. timorridge

    timorridge Member

    Joined:
    Jan 22, 2006
    Messages:
    32
    Likes Received:
    0
    Hi all,

    Went to local scrap yard today, paid 3 pound for a switch off a 91'J model B4 shape. Tried it not worked, double chacked fuse with another 30 amper. Running out of ideas. Really annoying but to small to warrant paying for a repair.

    Checked manual and it says that mirrors come on when rear demist is on.

    Any more suggestions are welcome

    Thanks for all replies so far.
     
  6. 1210tech

    1210tech Four Ring Fanatic

    Joined:
    Nov 21, 2006
    Messages:
    692
    Likes Received:
    0
    i have this same problem but only one mirror is affected, drivers side not working but passenger side is fine. my car is a 2001 a4 b6 chassis, the mirror heaters only come on when i turn the rear windscreen demister on.

    have put the problem down to a faulty mirror glass that needs replacing because apparently it is the glass that has the heating element in it.
     
  7. timorridge

    timorridge Member

    Joined:
    Jan 22, 2006
    Messages:
    32
    Likes Received:
    0
    Right then, I have done a bit of basic fault finding on this problem. (Audi 80)

    Carefully prised off each glass of the mirror, element is a circular pad which sits centrally and connects to power via two spades. Connected 12v battery to spades and volia, heated up like normal. Repeated same for other glass and same result so glass is OK.

    Fuse not blown

    Put tester across the two wires from door mirror and no electrical output on both sides of car

    I have traced the wires as fars the rubber flexi joint at each door before it dissapers in to the depths seems to be no damaged wiring.

    I think it is the switch as they worked on the old switch

    The only question I have is before it gets confusing, where would I get a Heated rear window switch for this car that has heated mirrors. If any body has one to sell taht would be great.

    Any replies grately appreciated.

    Thanks
     
  8. timorridge

    timorridge Member

    Joined:
    Jan 22, 2006
    Messages:
    32
    Likes Received:
    0
    I have found a part number that may help

    4A0 941 503

    Could any VAG experts decode that please and let me know if that is the part that I need?

    Many thanks again
     
  9. JGrant1285

    JGrant1285 Sir Scouser Benitez

    Joined:
    Jun 5, 2006
    Messages:
    225
    Likes Received:
    0
    im having the same problem, only the opposite mirrors. when i got my car, the o/s mirror was missing, so got one from audi, this is the one that works.......you think i need to buy another one for the other side??
     
  10. mjhamilton

    mjhamilton Broooom Brooom Brooom!!

    Joined:
    Jul 24, 2003
    Messages:
    26
    Likes Received:
    0
    got an A6 B5.. mirrors stopped demisting a year ago.. question.. how do you get the glass out without breaking it??
     
  11. JGrant1285

    JGrant1285 Sir Scouser Benitez

    Joined:
    Jun 5, 2006
    Messages:
    225
    Likes Received:
    0
  12. shineydave

    shineydave Member

    Joined:
    Jan 1, 2006
    Messages:
    918
    Likes Received:
    4
    isn't there a hole underneath the mirror that you can get a screwdriver in and flip the locking ring, i thought they were mounted on sort of a baynet fixing that needs rotating to release
     
  13. ang12el

    ang12el Member

    Joined:
    May 30, 2007
    Messages:
    65
    Likes Received:
    0
    Just read this thread with intrest - I have a 52 b6 avant and neither of my mirros heat up noticed this today when it persisted it down and the rain just stuck to the glass like glue .. However having misplaced the manual how are the mirrors activated to heat up is it by having the rear window on Or is there a seperate switch to use on the controls in the door panels..?

    Hope I am not asking the obvious but if anyone could point me in the righd direction I would appreciate it

    :)
     
  14. vw754

    vw754 vorsprung Durch Technik

    Joined:
    Nov 4, 2006
    Messages:
    2,104
    Likes Received:
    39
    not all model have heated mirrors!
     
  15. JGrant1285

    JGrant1285 Sir Scouser Benitez

    Joined:
    Jun 5, 2006
    Messages:
    225
    Likes Received:
    0
    Correct me if i'm mistaken, but i always thought that they were on whenever the rear heated screen was on? Don't they use the same button?
     
  16. ben21

    ben21 New Member

    Joined:
    Jan 7, 2007
    Messages:
    13
    Likes Received:
    0
    If i remember right the heated mirrors only come on when the outside temperature drops below a certain point.
     

Share This Page