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The first of many air con threads... I'm stumped.

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by benjie, May 22, 2012.

  1. benjie

    benjie Well-Known Member

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    Have had a quick search and can't find anything that helps.

    My air con is playing up. Set at 21 today (26 degrees) and it went on full, then...

    Windscreen vent - ice cold
    Driver's vent (near headlight switch) - cool
    Central vent - Ambient

    Whatever setting I used (feet, top only, top and face etc) the temp stayed the same out of the vents.

    Then I set it to LO - no change.

    Then I set it back to 21... Lo and behold, the central/driver's vent then cooled down and became ice cold and it went on as normal.

    That's weird and I don't understand it.

    ECON light is not on, was re-gassed last August and no faults are showing in VCDS.

    Any ideas anyone?
     
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  3. kite

    kite Member
    VCDS Map User

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    A stuck flap motor could be causing the fault.
    You can check their operation by dropping the glovebox and watching the flap arms move..
     
  4. Ste_Nova

    Ste_Nova Active Member

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    use the output test in vcds to excercise it
     
  5. Ian-83

    Ian-83 Member

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    Carry out a basic settings.
     
  6. benjie

    benjie Well-Known Member

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    Thanks for the suggestions, I'll align my flaps (ooh eer) in Basic Settings tomorrow and maybe have a look at the output tests, then if that doesn't resolve it, I'll have the glovebox off at the weekend and see what's going on... My friend owns a B7 so I'll see if I can take that apart and compare the 2 in operation to see if mine's not doing something it should!
     
  7. benjie

    benjie Well-Known Member

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    Aligned the flaps via Basic Settings and gone through the output tests (all appeared normal) and it's still happening. Coding is all correct.

    I did notice that today, if I pressed the middle vents only button, the central vent eventually (after 2-3min) got cold. Then when I pressed AUTO, it stayed cold. So I'm thinking the central vent motor is on its way out?
     
  8. kite

    kite Member
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    You Could have a flap arm come loose.
    I would remove the glovebox and check the arms and their movement
     

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