Engine fan constantly on

Discussion in 'Engine' started by H.Potter, Aug 31, 2008.

  1. H.Potter

    H.Potter New Member

    Messages:
    3
    Joined:
    Aug 31, 2008
    Location:
    Slough
    Car:
    W210 E220 CDI
    I have a W210 E220CDI 1999 model automatic, Display showing engine fan visit workshop and the engine fan runs constantly on full speed as soon as i turn the key. It is like a jet trying to take off in there. All fuses are ok . Is there a control unit for this fan? where is it located? what can be the possible causes of this ?
     
  2. miro

    miro Hardcore MB Enthusiast

    Messages:
    3,444
    Joined:
    Mar 1, 2004
    Location:
    Sydney NSW Australia
    Car:
    W203 slightly modified
    It is a malfunction in the engine controller or temp sensor or perhaps its wiring.
     
  3. OP
    OP
    H.Potter

    H.Potter New Member

    Messages:
    3
    Joined:
    Aug 31, 2008
    Location:
    Slough
    Car:
    W210 E220 CDI
    Where is the temp sensor for the engine fan in my car?
    engine control? you mean ECU?
     
  4. paulmadac

    paulmadac New Member

    Messages:
    3
    Joined:
    Jun 29, 2009
    Location:
    Romania
    Car:
    E220 CDI
    Fan relay

    There is an fan relay box under the driver s headlight that controls the speed of the fan.You will have to change that.
     

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