Chris NottMonster Motorsport
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  1. #1
    3rd Gear

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

    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?
    B8 S4 Avant in Misano Red with some lovely toys!
    Prev: B6 A4 Saloon 1.9 TDI quattro Sport - great car.

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  3. #2
    kite's Avatar
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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..
    A4 (b6) 2.5 TDi QS Saloon.

  4. #3
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    use the output test in vcds to excercise it
    VCDS in North Wales
    2007 A6 3.0TDi S-Line Le Mans Avant , adaptive xenon lights, sunroof, privacy glass, towbar, led rears & randomly rear seat airbags
    1999 Honda S2000 , mcb low milage jap import, fully bushed, mugen exhaust <<< for sale! <<<
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  5. #4
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    Carry out a basic settings.

  6. #5
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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!
    B8 S4 Avant in Misano Red with some lovely toys!
    Prev: B6 A4 Saloon 1.9 TDI quattro Sport - great car.

  7. #6
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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?
    B8 S4 Avant in Misano Red with some lovely toys!
    Prev: B6 A4 Saloon 1.9 TDI quattro Sport - great car.

  8. #7
    kite's Avatar
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    You Could have a flap arm come loose.
    I would remove the glovebox and check the arms and their movement
    A4 (b6) 2.5 TDi QS Saloon.

 

 

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