Astra 1.6 Club (02) : Aircon playing up??

Discussion in 'Astra' started by email.martinthomas, Jun 20, 2006.

  1. Hi, my 1.6 16V Club may have a suspect air con problem.

    I have noticed after extended use that as the revs increase, so does a
    high pitch noise from the air con unit, that goes when it is switched
    off. Also, noticed a whiff a smoke the other day when it was switched
    off to normal fan operation.

    It still pumps out cold air, but any ideas what is going on with it?

    Your help as always ... appreciated.

    email.martinthomas, Jun 20, 2006
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  2. email.martinthomas

    ib Guest

    Have you had it regassed? Might be overgassed.
    ib, Jun 20, 2006
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  3. email.martinthomas

    Mike Guest

    Can you do this? I thought it would be something like filling a butane
    lighter, where you just fill a pressurised container until pressure
    equalises. or maybe theres a pressure safety releasevalve somewhere?


    (knowing nothing about aircon)
    Mike, Jun 20, 2006
  4. email.martinthomas

    ib Guest

    The pressures should be controlled by the expansion valve. There is a
    careful balance between condensed (liquid) refrigerant, and vapourised (gas)
    refrigerant. Too much gas will increase the amount of condensed liquid. If
    there is liquid in the system where there is supposed to be much more free
    flowing gas, the pressures can increase dramatically.
    ib, Jun 20, 2006
  5. email.martinthomas

    Mike Guest

    That sounds ok, but do you know if the level of gas is self regulating by
    some form of mechanism?

    Mike, Jun 21, 2006
  6. When I've had my Astra re-gassed, the gas has been weighed, so I doubt if
    it's self-regulating.
    Malcolm Stewart, Jun 21, 2006
  7. email.martinthomas

    ib Guest

    Yes, by the amount the bloke who regasses it puts in, normally by weight.
    But if he types in the wrong info to his machine, or goes for a fag while
    it's pumping in, etc.....

    Normally you can see if there's too much gas by watching the high side
    pressure, if you have gauges attached
    ib, Jun 21, 2006
  8. email.martinthomas

    mikeFNB Guest

    probably just the compressor drive
    as for the smoke again i doubt very
    much it has anything to do with the aircon

    over gassing is very diff to acheive,
    and its not 'just like a fag lighter!!' :)

    give it a test as i described in a previous msg
    and maybe a halfords mould bomb.

    mikeFNB, Jun 21, 2006
  9. Thanks all, much appreciated. My garage thinks it might be the pump,
    and I have been running the car with aircon on for the last couple of
    days without smoke or noise problems, although only for short periods.

    I'm wondering if the smoke may have been a condensation blow through??

    email.martinthomas, Jun 22, 2006
  10. email.martinthomas

    mikeFNB Guest

    try a halfords bomb
    that will sort it out.

    i know its a bodg-ish
    but i'd give the pump shaft a squirt of wd40 first before you spend out.

    mikeFNB, Jun 22, 2006
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