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AC possessed? 850

posted by  streetcleaner on  Fri Jun 28 16:35 CST 2002
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my 95 850 is having some AC issues. first of all, it's not as cold as i would like it to be, but i expect that since this is my second 850 and i know it's about time for a recharge. i am, however, procrastinating since it should be time to replace some of the components and it may add up to $300 or so.

anyway, my question is this... my AC is making a quiet, piercing ring. i can notice it especially at lower fan settings, it seems to repeat at 4.5 second intervals and the tone itself lasts about a second. has anyone else experienced this?

also, just the other day, while the AC was on, i had what looked like steam (not heat steam, but more like dry ice steam) begin to flow out of the vents. so i shut it off for a moment and turned it back on. the air was colder than ever for the remainder of my ride home. however, since that day, my air has gone back to it's normal behavior of taking a while to really get cold.

i know you're all probably tired of AC questions and issues, but i guess it's that season. thanks in advance for any help...







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    AC possessed? 850 1996

    posted by  someone claiming to be Lee on  Sat Jun 29 15:28 CST 2002 [RELATED]

    hi,

    I have an '96 850 Turbo and I have the same symtoms.

    It happens to me more often when the turbo kicks in or "kicks out". But
    I've noticed today that it also happened when the turbo was not
    "kicking" in or out. Like you it happens every 5-10 secs interval lasts
    for a second - but I've noticed that as things cooled down in the car,
    the noise would go away or has a lomger interval between "manifestations" :-)

    I went to the dealer this week and explained the problem and the service
    reps agreed with each other that it's just the turbo drawing air. I am hoping someone can concurn with the Volvo service guys on this.

    Also went to a garage to get inquire about a r134a recharge, the "air con
    expert" measured the temperature of the air coming out of my vent ( he
    stuck a thermometer, that looked like a meat thermomether into the vents
    on top of the radio) The temperature was 10C on a day where it was more then
    30C outside. He said that I didn't need a recharge.

    Hopefully my experience could help you.

    Lee








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      AC possessed? 850 1996

      posted by  streetcleaner on  Sat Jun 29 17:35 CST 2002
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      Lee, i appreciate the feedback. also glad to hear that i'm not the only one in this boat. my 850, however, is not a turbo... so this might be a hole in your service reps' explaination. no offense to them, as i'm sure they are more than competent.

      you're right, as the car cools down, i seem to notice the noise less. at higher fan speeds (i.e. 4 instead of 2), the sound seems to be minimal, although maybe it's just getting drowned out. ringing sound aside, i feel as though my AC sounds like a respirator when i am idleing. problems with the AC in my previous 850 actually caused smoke to come through the air vents.. not to mention it made the car stall when i turned the air on.

      regarding the thermometer, when i had my old 850's AC recharged (and later on repaired), they used the 'meat' thermometer both times. i had the same reaction you did, but i guess it does the job.

      can anyone else out there help us? a past experience or a hunch maybe?







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    AC possessed? 850

    posted by  someone claiming to be hf63 on  Fri Jun 28 17:33 CST 2002 [RELATED]

    I am not sure but if you have the automatic climate control, I would begin by cleanning the portals to the sensors and might check the computer that controls the ECC. IF you know how to read codes by pressing the buttom 3 times instead of one the system goes into self check mode and can display some codes that had not been dectected before.







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