Question about BMW 525

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Faulty Fan Heater - The main vents are just blowing out cold air.

When I turn on my fan heater. The main cabin vents in the centre of the dash and beside the doors blow out cold air, whilst the demister and foot well heaters all blow out hot.

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  • nick_carring Feb 02, 2009

    This is a 1991 model, so no idrive and I can't find a button for recycle either. I guess it didn't come with one. Any other suggestions?

  • nick_carring Feb 02, 2009

    This is a 1991 model, so no idrive and I can't find a button for recycle, so I guess it hasn't got one. Anyone got any other solutions?

  • nick_carring Feb 03, 2009

    Thanks for your advice, but how do I take apart and remove the dash vents in a 91 BMW 525i SE? I have instructions to access the heater system via the stereo slot and heater console, but the vents themselves are fixed into tight slots in the dash above. Do I need to disassemble the dash to remove the central vents? Or is there an easier way?

  • James Tepfenhart
    James Tepfenhart May 11, 2010

    are you putting the vents on recycle or fress air.

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All cars have a recycled air weather its called max or just recycle its doing the same thing. So if your getting cold air in one spot and hot in another it means your vents are not blocking where they are suposed to. It could be just a simple fix, by getting into the dash where your vent controls are and looking at the flap that tells air where it can and cant go. if its stuck then it needs to be cleaned and oiled. If the cable is corrodend clean it and oil it so it can move freely, or just reconnecting it may be the fix. it sounds like you are going to have to be adventurous, and play with the mechanics of your vents. Typicaly theres really nothing tough there to work on, just REMEMBER WHEERE ALL THE SCROOS AND CLIPS GO. I have forgotten where a few went in the past and had to listen to sqeaking noises till I took it apart again. There are vent seals wich are no more than the weather stripping you buy at the hardware store the 1/8 inch thick tape. You may need to thin it down with a razor, usually not. but it works great for fixing the seals in car heaters, because its the same thng just a different color. Which no one will ever see.

Posted on Feb 02, 2009

  • James Tepfenhart
    James Tepfenhart Feb 04, 2009

    Ok, your not worried about accessing the the vents, your concern is behind the vent. Its in the dash. You need to find a Chilton for your vehicle. Not a haynes. Get a Chilton, and it will give you directions to disasemble your dash, and many other things. You want to disasemlbe the vent assembly. or channels that direct the air to go to specific vents. Thats where the channel flap will be located.

    tepfy


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Go to your idrive., climate the vent settings. you will see a person along with vent areas on the side.
If this persons color is blue it blows cold air so turn the dial for vent closest to that person until the
color changes red then hot air comes out on the vents for driver and passenger. Then let me know.

Mark
2006 BMW 530i sport

Posted on Feb 01, 2009

  • akong_email_ Feb 04, 2009

    Just wondering if you have tried stopping by a BMW dealer service area and ask suggestion.
    I believe that there is nothing wrong with your air vent, it happened to me at first until I read
    the manual.


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