MacBook Pro early 2008 fan problem

Discussion in 'MacBook Pro' started by Flansch, May 26, 2013.

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  1. Flansch, May 26, 2013

    Flansch macrumors newbie

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    May 26, 2013
    #1
    Hi there guys ...
    been searching the whole day now

    broken down my MBP into its individual parts 4 times now and i hope somebody can help me...

    i replaced the left fan with a NEW one and the new one runs at its peak from the start up

    hardware test says 4mot/1/000blabla left side -0

    smc reset won't work AT ALL

    i checked all the cables and i put the old fan back again and it works just fine

    but when i put the the new one back again....buyaaaaaaaaa!

    and don't tell me the new fan is broken :)

    MBP early 2008 10.6.8
     
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  2. B..., May 26, 2013

    B... macrumors 68000

    B...

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    Mar 7, 2013
    #2
    The new fan is broken.

    Is that impossible?
     
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  3. Flansch, May 26, 2013

    Flansch thread starter macrumors newbie

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    May 26, 2013
    #3
    hehe well no...at least i thought a broken fan won't work at all :)
     
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  4. B..., May 26, 2013

    B... macrumors 68000

    B...

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    #4
    Incompatible maybe?
     
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  5. Flansch, May 27, 2013

    Flansch thread starter macrumors newbie

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    #5
    it is exactly the same
     
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  6. snaky69, May 27, 2013

    snaky69 macrumors 603

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    Mar 14, 2008
    #6
    If you've disconnected a temperature sensor, the mac will run it's fans full speed because it has no idea how hot or not it is. It's a failsafe.

    Make sure all your temperature sensors work.
     
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  7. Flansch, May 27, 2013

    Flansch thread starter macrumors newbie

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    #7
    yeah all the sensors work just fine
     
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  8. duervo, May 27, 2013

    duervo macrumors 68000

    duervo

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    #8
    One of the wires for the fan is used to control the speed of the fan. If there's a problem with that wire or its connection, the fan will just run at max rpm all the time.

    Check the wires from the fan casing and then check them at the connector end for issues.
     
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  9. Flansch, May 31, 2013

    Flansch thread starter macrumors newbie

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    May 26, 2013
    #9
    i did that too

    thanks gyus i really don't know what is going wrong...

    i sent the fan back and will get a another one

    i'll le you know ..

    thank you all so far
     
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