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Air Con not working

Discussion in 'A4/S4 forum(B5 Chassis)' started by bigmikeyoyo, Jul 19, 2012.

  1. bigmikeyoyo
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    bigmikeyoyo New Member

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    [Jul 19, 2012]
    Hi, I have an 02 1.9tdi with 126k on it. Recently the air con stopped working with the econ button permanantly on. I went to quick Fit as I thought it just needed a re gas but they informed me the unit wasnt kicking in so there was no point in re gassing the system. I know nothing about air con systems but when I look i the engine bay the belts look fine but the air con fan is not working. All fuses are fine, any help appreciated,
    Cheers
    Mike
    #1
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  3. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jul 19, 2012]
    i believe if the pressure is very low, the system wont engage the clutch on the compressor to protect the compressor from damage.

    So it may just need a regas...

    Get a decent aircon specialist on it though, kwikfit type places wont have the experience required, and end up giving you incorrect advice.
    #2
  4. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    [Jul 19, 2012]
    Yes thats correct the aircon will shut off if theres no gas/pressure in the system but it could also mean you have a leak or it could just be a matter of a regas. As aragorn says get it done properly where they actually drain the system, vacuum test for any leaks and add required uv dye if there is a leak, and dont just fob you off when it shows a leak or the compressor doesnt kick in. Who ever told you that they cant gas it is a total mong.

    You can tell straight away if theres not enough gas in the system as the gauges on the A/C machine will display your high and low pressures and you can diagnose the system with it all connected and the car running by just watching the pressures displayed.
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  5. bigmikeyoyo
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    bigmikeyoyo New Member

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    [Jul 19, 2012]
    Thanks guys, I thought seen somewhere before that the compressor shuts down when the system runs low to prevent damage. Morale of the story I guess is that Quick Fit are ****
    Cheers
    Mike
    #4
  6. murran
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    murran Active Member

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    [Jul 19, 2012]
    my mates seat leon tdi. they (kwik fit) re-gassed it and it still didnt work... they looked at it for half an hour and couldnt find out what was wrong with it. charged him £45 for the privelidge.

    i looked under the bonnet for all of 60 seconds and spotted the clutch on the aircon pump pulley simply wasnt there!!
    #5
  7. Nessy
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    Nessy VW + Audi mad

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    [Jul 20, 2012]
    I'm sorry that this isn't going to be a particularly helpful post, but I wouldn't trust Kwik-Fit to put air in my tyres, let alone touch anything under the bonnet.
    Best get it checked out by a reputable garage/mechanic that knows air-con systems and how they work.
    #6

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