2002 E46 330ci - Is it the Final Stage Resistor????

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  1. 2002 E46 330ci - Is it the Final Stage Resistor???? 
    #1
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    After a previous post of something draining my battery intermitently I have tried various solutions without success.

    Last week I changed the montior screen for one I knew that worked. Whilst putting back together I must have knocked a wireloose becuase I couldnt get any hot airthrough my vents. Not the best of wether to do this as it took me hour to defrost the thing. Anyway I decided to leave it to see if thescreen made any difference. It did, my battery was fine and the car started no problem, even in the freezing cold.

    So Ive put the rest of the plugs back in and got hot air again.....very nice. 2 days later battery completely flat again and needs to be jump started.

    So I have now decided that it is definately the climate control unit and started searching and came across a few posts about the final stage resistor. So will it be this or the climate control unit that needs changed?

    The air has never been what is ice cold since I had it but thought this just meant the air con needed recharged.

    Any advice gratefully received folks. Thisproblem is driving me nuts!!.

    Davy
     
     

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    #2
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    Please prefix ALL of your threads with


    2002 E46 330ci -

    as per the posting rules

    thanks
     
     

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    So, let me understand this.

    You were getting a flat battery.. and you changed the monitor screen to sure it

    then knocked a wire and lost all heat...and then reconnected the plugs and have heat but the battery is going flat again>?

    is that right

    and final stage resistor normally means the fan only comes on at one speed iirc or the airon is intermittent but no heat or air con even on highest setting.

    Try pulling fuse 50 which iirc resets the FSU, it may or may not help (not I suspect)
     
     

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    #4
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    had exactly the same problem 2 years ago with my e46 and it was the heater hedghog which might be called the final stage resistor it is quite common apparently and bmw upgraded part, it is located on rear of heater on drivers side,
    a bit arkward to get to but only held in with a torx screw and one wiring plug.
    you can try pulling the appropriate fuse at nite to see if this eliminates problem (how I found cure) I think its fuse 37 not 100%, but it is one of the large ones in fuse box.
    hope this helps
    joe.
     
     

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    Thanks guys,

    Sorry for not replying sooner been unable to get online for a little while.

    I will give the suggestions a shot, re the fuses.

    At the moment I have been driving around with no monitor or climate control at all. Its all been connected and I havent had a problem starting at all.

    Also the heater and fan was blowing fine, different speeds of air and heating fine. So not sure about the fsr thing.

    However I thought the position of the FSR was behind the glovebox in a RHD car. Could do with finding out before I go ahead.

    Cheers

    Davy
     
     

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    Under the dash on the drivers side.. Here is a link from, showing detailed instructions on how to change it!

    http://www.bimmerforums.co.uk/forum/...e-is-it-t3474/
    Last edited by Kevin Whittaker; 26-01-2010 at 10:50. Reason: Forgot the link..
     
     

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    well my cars heater sometimes pulses on the 2nd to last max speed!
    no battery loss, no warm or cold air loss?
     
     

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    Have had the FSR changed but the problem is still there. When everything is connected back up I get a flat battery.

    It just goes completely dead.

    I have refitted only the monitor at the moment and everything seems ok for now. So suspect that the problem definately lies within the climate control bits somewhere along the line.


    Would changing the whole unit work or not?

    Davy
     
     

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