volvo 850 96 air con question

Discussion in 'Volvo 850' started by col, Jun 8, 2004.

  1. col

    col Guest

    hi

    have noticed that my air con is not very cold, when switched to max
    cold, its no better on climate as well, i know most of the system
    needs a air con specialist, but could it be short of refrigerant?


    any help greatfull
    col
     
    col, Jun 8, 2004
    #1
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  2. have noticed that my air con is not very cold, when switched to max
    Normally its lack of refrigerant. If the compressor goes on and off shortly
    after you need a refill.

    Niels
     
    Niels Bengaard, Jun 8, 2004
    #2
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  3. col

    col Guest


    thanks for the info, when the car is stopped but engine idling, the
    compressor cuts in and out about every 5 seconds, with the aircon
    on,is that low refrigerant?

    colin
     
    col, Jun 8, 2004
    #3
  4. thanks for the info, when the car is stopped but engine idling, the
    yes, thats a normal sign of low refrigerant

    Niels
     
    Niels Bengaard, Jun 9, 2004
    #4
  5. col

    Graefaxe Guest

    I have the same issue with a '95. I hooked up a pressure guage and get
    reading of between 25 and 45 psi. What should it be with a full charge?
     
    Graefaxe, Jun 10, 2004
    #5
  6. col

    Mike F Guest

    The pressure is regulated with a switch that turns the compressor on and
    off based on that pressure. The compressor is turned off at 25 psi,
    when the pressure to rises to 45 the compressor is switched back on. It
    doesn't matter how little refrigerant is present, as long as there's
    enough to start the compressor, this is how it will work, so you can't
    set the charge by this pressure. The fact that it's cycling quickly
    indicates a low charge, so adding some will make it better, but if you
    get too much in there, liquid can get into the compressor, ruining it.
    The only accurate way to fill the system is to take it all out and put
    in the correct weighed amount.

    --
    Mike F.
    Thornhill (near Toronto), Ont.

    NOTE: new address!!
    Replace tt with t (twice!) and remove parentheses to email me directly.
    (But I check the newsgroup more often than this email address.)
     
    Mike F, Jun 10, 2004
    #6
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