Question about 2008 BMW 528i Sedan

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AirFlow stopped working on E39 1998

For couple weeks the airflow was on and off. Now , when I needed it the most, in summer time in CA - it stopped working. No sound of fan or any air movement. Last time the dealer refilled air conditioning in 2005 .
How to troubleshot the problem and can I refill air conditioning liquid on my own? any manuals how to?
thank you,
Alex Deiden

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  • alexdeiden Jul 02, 2008

    thank you ! I have checked what you'd suggested.

    belts are ok. when I start airconditioning - there comes a sound - like "clutched"- but no air is coming.
    I am not able to see whether compressor is leaking or not but I see a tiny spots of some liquid on the bottom under the belts.
    I definitely go to mechanic to check for AC leaks.
    How much would the work cost me?
    or can I do it on my own?

    How can I check the level of freon?

  • alexdeiden Jul 03, 2008

    Thank you for your help in steps to diagnose the problem!

    I went to mechanic and he connected AC to machine and assured when freon will be filled up - everything will be fine.
    It still did not work and he went inside the car and said that it is fan that does not work...therefore, he screwed me up on 95$. But at least I am sure now that it is smth with fan, not with airconditioning. Any tips on how I can check the fan? do I need to dissamble the panel?
    thank you in advance!


  • alexdeiden Nov 09, 2008

    check the fuse, go to the fuse box, on the fuse box panel, check the fan or accessory fuse.
    Which one is the fan and accessory fuse?

    2. If the fuse is ok, check the wire behind the fan, see if it is connect on.
    how can I see the wire behing the fan? do i need to disassemble the panel?

    3. If everything is fine, still doesn’t have air.

    4. I want you take a couple photos and email me.
    will do that.


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  1. check your fan belt, if your fan belt is in the normal position and no problem.
  2. check your compressor and also check the clutch, it is locate right in front of the compressor, when you turn on your air conidition, the clutch should be turn with the fan belt. If it is not, that means your compressor had problem.
  3. check fuse.
  4. check the freon small flow window see if the lique bubbling too much, if it is means you need fill up R-12 freon.
  5. you probably can not do it yourself, in case if you need freon and your compressor is completely empety, you need a special tool to **** the air out first and than fill up freon.
  6. if your air condition is leaking,and you have to fill up a can of special check leaking freon with red colour first, until you find the leaking parts, fix it then you can fill up freon

Posted on Jul 02, 2008

  • Frank Chen Jul 03, 2008

    you can not check the level of freon, I don't really remember where the condenser is for your car, but if you can find a small glass window on the condenser, it is around 1 cm, you will see some white bubbling through the window, that means you need some freon, if you don't see bubbling, probably you don't need to add freon unless you lost all of the freon.

    If you don't have tools that includes a meter gage for fill up the freon,it with high preassure gage and low preasure gage, and also you have to know how to do it. But I suggest take to some professional air conditioner manchanic fix it. How much to fix AC, it is hard to say, maybe just need freon service if there is nothing wrong otherwise-------.

  • Frank Chen Jul 03, 2008

    Hi Alex,

    I like your way to manage your problems, ask-check-ask again—double check and learning.

    How to check fan?

    1. check the fuse, go to the fuse box, on the fuse box panel, check the fan or accessory fuse.

    2. If the fuse is ok, check the wire behind the fan, see if it is connect on.

    3. If everything is fine, still doesn’t have air.

    4. I want you take a couple photos and email me.

    a. the photo around the fan area.

    b. The photo for your dash board.

    Hope I can help you


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