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W221 s350 blower motor always on

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by Darren Reis, Feb 3, 2020.

  1. Darren Reis

    Darren Reis New Member

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    Your Mercedes:
    SL 5OO / 2004/ 5.0, V8
    Hi all, looking for some information re my s350 , it seems water has been getting in to the blower motor, this in turn blew the SAM unit , the garage replaced the Sam unit , blower, blower control unit , actuator. But can’t seem to get the blower motor to function correctly, it runs constantly even with engine off key removed . The garage has washed their hands of it and I am now stuck with this situation and looking for help
     
  2. mioba

    mioba Senior Member

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    Your Mercedes:
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    Side stepping your question. Find decent merc indy.
    Get shot of that last mechanic who clearly fleeced you out of a few bob and leave him a negative review on google.

    Seems they have connected the blower to perm live. have you had a multimeter on the connections.

    Are you sure they replaced the blower motor at all and with what brand.
     
  3. OP
    Darren Reis

    Darren Reis New Member

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    Hi there thanks for the response

    This was supposed to be a reputable independent Mercedes specialist
     
  4. daibevan

    daibevan Senior Member

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    Your Mercedes:
    W203 C200 Kompressor Elegance SE 2006 Tanzanite Blue with cream interior
    When my SAM got wet I had the same problem with my blower. After fully drying out the SAM it was fine. Are you sure they have put a new SAM in? If so someone with more knowledge will be along soon.
     
  5. OP
    Darren Reis

    Darren Reis New Member

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    Hi there thanks for the reply, the SAM had a hole burned in it so there will be a new one fitted
     
  6. Botus

    Botus Senior Member

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    if its a 221 sound like rubbish as the blower and the SAM are on opposite sides of the car
    it does have the worlds most incompetent drainage setup that blocks and you may have buckets of water around the battery on the left and the brake reservoir on the right. Both are supposed to be bone dry. You need to regularly clean out the leaf litter that collects there
     
  7. OP
    Darren Reis

    Darren Reis New Member

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    Yes the Sam and blower are on different sides but when the car shut down
    I saw the Sam unit before I paid for car to transported to the Mercedes specialist, it had a hole the size of 5p burned into it
     
  8. Botus

    Botus Senior Member

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  9. OP
    Darren Reis

    Darren Reis New Member

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    Your Mercedes:
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