engine fan won't shut off

Discussion in 'Freightliner Forum' started by mike6334, Apr 27, 2016.

  1. mike6334

    mike6334 Bobtail Member

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    Apr 27, 2016
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    I have a 2012Cascadia with a dd15. I only have 421000 miles on this dam thing. Can anybody give me an ideal on what I need to do to fix my truck
     
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  3. cdub304

    cdub304 Light Load Member

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    Dec 7, 2009
    Rockford,IL
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    are you losing any air?
     
  4. RSQ20

    RSQ20 Medium Load Member

    The fan control is regulated by a solenoid which is commanded open/closed by the ECU.. A loss of air will activate the fan clutch, or the computer is seeing an abnormal temp..

    ... Philip
     
  5. cdub304

    cdub304 Light Load Member

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    Dec 7, 2009
    Rockford,IL
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    yeah what he said....lol:laughing3::laughing3::laughing3::laughing3::laughing3::laughing3::laughing3::laughing3::laughing3:
     
  6. mike6334

    mike6334 Bobtail Member

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    Apr 27, 2016
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  7. mike6334

    mike6334 Bobtail Member

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    Apr 27, 2016
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    No lost in air pressure. Temperature gage shows normal.
     
  8. stayinback

    stayinback Road Train Member

    3,911
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    Jan 24, 2014
    chicago,il
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    Replace the Fan Hub assembly then....

    I had the same problem...No aiir leak, No Temperature issues....

    Usually under $400 bucks, Well Mine was for a 3176 Cat motor
     
  9. mike6334

    mike6334 Bobtail Member

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    Apr 27, 2016
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    I had that under consideration
     
  10. RustyBolt

    RustyBolt Road Train Member

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    Feb 21, 2015
    Bement, IL
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    Check the fan solenoid first. Probably not the problem but much cheaper fix if it is. Turn the key to the on position and then check for air leakage near the fan. You won't hear it leaking with the engine running and it won't leak with the key off. At least, that's how it went with mine.
     
    blairandgretchen Thanks this.
  11. mike6334

    mike6334 Bobtail Member

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    Apr 27, 2016
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    Thanks guys. I'm thinking my problem is the the fan hub. The last 2 days the fan has been working like it should. The quality of freightlener trucks is horrible.
     
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