E39 Blower Motor (Not Hedgehog)

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  1. E39 Blower Motor (Not Hedgehog) 
    #1
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    The blower on my recently purchased E39 refuses to work.

    Today I bought a new FSU which hasnt solved the issue.

    If I turn the car on the FSU gets very hot very quickly.

    Am I looking at a burnt out blower motor / auxilary fan? I only had the new FSU on for about 30s so I'm hoping it's not blown it.
     
     

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    Have you checked the fuses? they should be blown if the motor is seized
     
     

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    Fuses are all intact.
     
     

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    Just checking the car over now and it has just dawned on me that when starting the car from cold the temperature will reach normal (assuming half way is normal) after a very short period of time.

    I've just left the car ticking over and let the car get as hot as I dare without it boiling over and the needle didnt deviate from half.
     
     

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    This IS the heater in the car yes? As now you've mentioned running the car till hot I'm not sure if you mean the AUX fan under the bonnet by the radiator? can you clarify
     
     

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    Neither the heater blower or auxilary fan fire up. I have read somewhere that they are linked somehow.
     
     

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    The aux fan will only fire up when the Air con is on or the cooling system is too hot.

    Do you have power at the inside heater blower motor fuse?
     
     

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    That's tommorows task. Although i may have wrongly assumed that the fuses are being powered as the hedgehog gets it's power from those.

    I'll dig the multi meter out and have a probe.
     
     

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    A test light will be a better tool, a multimeter needs very little current to indicate 12 volts
     
     

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    Just a thought. Would the Hedgehog still get warm when the ignition is on if someone had pullred a relay to stop the aux fan running constantly?
     
     

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