E39 525 Heater blowers not working..
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  1. #1
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    Heater blowers not working..

    This time I'm asking for my bro in law lol, he's got an e39 525, the blowers arent working although they all light up fine, and all fuses seem fine! Any suggestions? Thanks in advance, Martin

  2. #2
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    Heater blowers not working..

    Knackered motor? Or fsr? Did he get any pulsing or changing speeds on its own before it broke?

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    martin (09-10-2012)

  4. #3
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    Heater blowers not working..

    No, mate, nothing like that, just locked it up, came back and now not working

  5. #4
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    Check the blower motor can spin and hasn't seized - If it spins, then i'd say the hedgehog has gone.

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    martin (09-10-2012)

  7. #5
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    Heater blowers not working..

    Quote Originally Posted by Ferret View Post
    Check the blower motor can spin and hasn't seized - If it spins, then i'd say the hedgehog has gone.
    Cheers mate, I'll text him that now

  8. #6
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    I had exactly the same - several times! Every time I and the Garage replaced the 'hedgehog' speed control unit - for which you need to disconnect the power cable to the fan, beside the hedgehog. This is a small plug on the loom that connects into the hedgehog. In doing such a replacement, inevitably the fan started again and ran for a while. So what caused multiple failures? After the third hedgehog failure, I examined the wiring and plug properly and guessed why the garage had not - it's difficult to see way under the dash and you have to squirm into the driver's foot-well to get to it! Anyway, what should I find but a slightly burnt connection on one of the pins! It was difficult to see as it was more oxidised than burnt away due to the connection 'fizzing' because of it being a bit loose after 150k miles. I simply cut a small piece of aluminium foil and carefully slotted it into the pin socket and then carefully pushed the male plug into the socket. It was then tight and of course my new hedgehog worked fine! I then experimented with the previously changed hedgehogs and all worked fine!! I have had no further problems and now have a few hedgehogs spare! Anyone need one? It goes to show that a little time thinking about basic fault modes can help find a more common cause of failure. P.S. I had never heard of a fan seizure - even the garage had not and apparently it is pig to change anyway if you need to!

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    Ronnie (01-11-2014),StK (29-10-2014)

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