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Interior AC/heat fan issue

Discussion in 'E46 (1999-2006)' started by mrocca, Feb 22, 2009.

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    mrocca

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    2001 330 ci premium and sport options manual trans 65K miles

    At times the fan seems to go through a rapid non-aggressive cycle of increasing and decreasing - both in automatic and manual modes. Additionally, at times when the ignition is turned off and key removed the fan continues of run at a very low speed. Sometimes it stops on its own after 20-40 sec. Other times I have to manually turn on and off several times. All other aspects of the A/C and heat appear to function properly.

    I suspect some sort of control issue - any idea where and how to adjust/replace?

    drummerfc guest

    Post Count: 479
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    VERY common problem...you need a replacement of the final stage item/thingy. Not sure exactly what it's called (I'm sure the corrections will begin shortly after I post this...:D) Anyway, I had the exact same issue a few months back. It doesn't appear to be a big problem until one day you go to start the car and find out your battery's dead (because the fan would run on its own - even when the car is not running).

    Moral - get it checked out and fixed right away!
    • Member

    az3579

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    You need the final stage resistor. I believe the part # is: 64 11 6 923 204

    M3Driver guest

    Post Count: 619
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    ^^^^
    Agreed; I had to have mine replaced on my '01 330Ci as well....
    • Member
    • Technical Service Advisor

    mooseheadm5

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    Yup. And it is very easy to replace if you have a Bentley manual.
    • Member

    az3579

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    That's not what Chris demonstrated. Took him an hour just to get it loose, and that doesn't include him taking it out. :D


    Don't let his incompetence discourage you!
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    mooseheadm5

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    I almost pointed that out, but went back and deleted it.
    • Member

    az3579

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    His is an E39 though, so it could be a little different?
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    mooseheadm5

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    Same basic setup, IIRC.
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    mrocca

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    Final Stage Unit Thanks for Assistance

    Thanks to those that responded. I have ordered the part and reviewed installation procedure, which does not appear complicated.

    drummerfc guest

    Post Count: 479
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    Yeah...that's it...a final stage resistor...that's it...THAT'S the ticket...

    ;)

    Thanks Botund...

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