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HVAC Crashed

Discussion in 'A4/S4 forum(B5 Chassis)' started by ScottD3, Dec 12, 2012.

  1. ScottD3

    ScottD3 I want your faulty electronics
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    Since we've been having really cold mornings, my HVAC has decided to crash.

    Nothing happens on any of the buttons, the fan still moves on Auto but I can't change any thing, turn it off but the recirculate button flashes on and then off.

    Any one else noticed this?

    There is no codes on VCDS and after 10mins or so it comes back to life.
     
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  3. Broken Byzan

    Broken Byzan Photographic Moderator
    Staff Member Moderator VCDS Map User quattro Audi A4

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    mine does something similar since i spilt a cuppa over mine. I assumed it was a sticky button preventing me selecting any other feature
     
  4. ScottD3

    ScottD3 I want your faulty electronics
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    That might be it.
    My rear demister button is sticking along with two others.
    Time to strip it and clean the buttons I think.

    Want me to do yours?
     
  5. B5 BIKER

    B5 BIKER Member

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    My old one use to get stuck on a cold morning and get locked up:wacko:
     
  6. Broken Byzan

    Broken Byzan Photographic Moderator
    Staff Member Moderator VCDS Map User quattro Audi A4

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    I can do it, just am lazy,lol mine has my boost and oil pressure gauge incorporated so not got around to it
     
  7. PAULF

    PAULF Active Member
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    There's a good chance it's the board going Scott.

    If your button clean doesn't help, open the module and remove the circuit board. 10 minutes at Gas Mark 7 - 8 (that's about 210 - 220 C in new money) will reflow the joints. (This will work VERY well on electronics made post the stupid 2006 EU ruling about lead in solder)

    If it doesn't work, then a new module is in order.
     
  8. ScottD3

    ScottD3 I want your faulty electronics
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    I'm not putting it in the oven, sod that. lol


    Any one got a single din facelift unit? :)
     
  9. Sulli79

    Sulli79 Active Member

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    I have two one with heated seats one without
     
  10. ScottD3

    ScottD3 I want your faulty electronics
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    Thanks.

    I'll clean mine down over the Christmas, if it don't help I'll be touch for the none heated unit.
     

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