2000 E46 318ci - Rad Fan

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  1. 2000 E46 318ci - Rad Fan 
    #1
    BMW Master
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    M4RKY N's Car Details
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    My rad fan is on all the time, from when i start the car untill i switch it off. Ok this isn't a major issue as i know my car will never over heat, but its slightly annoying sounding like a jet engine all the time is there anyway that this can be fixed?

    Thanks
     
     

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    #2
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    dazza316i's Car Details
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    has this only just happened or did you buy it like it if it was like it when you bought it it has probably been done to mask overheating problem so i would investigate this first
    to resolve it is probably a wire shorting across thermostat switch remove and plug back into switch
     
     

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    #3
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    M4RKY N's Car Details
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    i have removed the plug and plugged it back in but still doing the same. It was running ok when i bought it, but i did notice that it ran alot more than what my astra convertible one did, but now its just a constant running fan
     
     

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    sounds like you need a new switch wouldnt have thought they would be much from dealer
     
     

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    #5
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    M4RKY N's Car Details
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    So the switch as in the plug in plug out of the black that is stuck on the car?
     
     

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    As in this part?
     
     

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    1.) test the thermal sensor see if it is the same state when it is cold vs: hot
    2.) find the fan relay see if the contacts are stuck. If its normally off contacts test for continuity xcross relay contacts when in open state.
    Hope this helps
     
     

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    should be a brass metal plug in rad
     
     

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    #9
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    where can i find the rad relays at?
     
     

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    #10
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    Quote Originally Posted by michael yukoweic View Post
    1.) test the thermal sensor see if it is the same state when it is cold vs: hot
    2.) find the fan relay see if the contacts are stuck. If its normally off contacts test for continuity xcross relay contacts when in open state.
    Hope this helps
    Found that the thermal sensor was was broke. My car over heated yesterday and i had to take this housing off and take the stat out and put all back together again and its working fine now, but the fan is still working none stop all the time. Would the thermal stat have a sensor to make the fan start and stop? With the stat out would the fan run at all? And does any body know which of the relay's are the one for the fan? or am i best just keeping the car running and taking out each one and see what happens?

    Thanks
     
     

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