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Engine fan not coming on

Discussion in 'Experienced Truckers' Advice' started by RepoweredRookie, Jul 13, 2024.

Page 1 of 2
  1. Jul 13, 2024 #1
    RepoweredRookie

    RepoweredRookie Light Load Member

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    Apr 16, 2019
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    What’s up Guys.

    I got a 1999 Freightshaker Century with an S60 12.7 Detroit.

    Fan should be coming on when water temp his 180 degrees, but it doesn’t. I have to maually use my engine fan switch everytime now. Do you guys have any idea what I could check?

    -have power at solenoid switch
    -I did replace coolant temp sensor

    Thank you for any suggestions!
     
    RepoweredRookie, Jul 13, 2024
    RepoweredRookie, Jul 13, 2024
    #1
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  3. Jul 13, 2024 #2
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Fan shouldn't come on till 210-212*
     
    Big Road Skateboard, Jul 13, 2024
    Big Road Skateboard, Jul 13, 2024
    #2
    Bean Jr., exhausted379, BoxCarKidd and 6 others Thank this.
  4. Jul 13, 2024 #3
    Concorde

    Concorde Road Train Member

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    Jun 29, 2016
    West Melbourne Florida
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    Shouldn’t come on at 180 imo but I’ve never owned a Freightliner.

    Mine have always come on around 210
    My normal operating temp is 181-183
     
    Concorde, Jul 13, 2024
    Concorde, Jul 13, 2024
    #3
    Bean Jr., blairandgretchen, Suspect Zero and 1 other person Thank this.
  5. Jul 13, 2024 #4
    RepoweredRookie

    RepoweredRookie Light Load Member

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    Apr 16, 2019
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    Oh wow, I think you guys are right. The thermastats are 180 degree, which means the fan should be 10-20 higher. OK maybe I got confused I will run it down the road and recheck it.
     
    RepoweredRookie, Jul 13, 2024
    RepoweredRookie, Jul 13, 2024
    #4
    Bean Jr., Suspect Zero, Big Road Skateboard and 1 other person Thank this.
  7. Jul 13, 2024 #5
    RepoweredRookie

    RepoweredRookie Light Load Member

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    Apr 16, 2019
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    My running temp is 175-180. So when I saw 190 and no fan the other day I may have got spooked for no reason. Thanks for the response, I’ll double check.
     
    RepoweredRookie, Jul 13, 2024
    RepoweredRookie, Jul 13, 2024
    #5
    Bean Jr., Concorde, Suspect Zero and 1 other person Thank this.
  8. Jul 13, 2024 #6
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Fan on temp will not change with lower thermostats. It is set in the ECM by Detroit. I don't even think you can change fan on temp, just duration.
     
    Big Road Skateboard, Jul 13, 2024
    Big Road Skateboard, Jul 13, 2024
    #6
    exhausted379, RepoweredRookie and Concorde Thank this.
  9. Jul 13, 2024 #7
    blairandgretchen

    blairandgretchen Road Train Member

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    Dec 9, 2011
    South west Missouri
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    Same here, same motor.
     
    blairandgretchen, Jul 13, 2024
    blairandgretchen, Jul 13, 2024
    #7
    RepoweredRookie and Concorde Thank this.
  10. Jul 13, 2024 #8
    snowwy

    snowwy Road Train Member

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    Jul 6, 2009
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    215 is what I've been seeing in cat, Cummins, and paccar. And the newer detroits.
     
    snowwy, Jul 13, 2024
    snowwy, Jul 13, 2024
    #8
    RepoweredRookie, BoxCarKidd and Concorde Thank this.
  11. Jul 13, 2024 #9
    bryan21384

    bryan21384 Road Train Member

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    Sep 18, 2009
    Memphis, TN
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    180?!??! That's around what your truck is supposed to run at. I thought the fan came on at 220, but to be fair it's been a while since I've been in a Cascadia.
     
    bryan21384, Jul 13, 2024
    bryan21384, Jul 13, 2024
    #9
    RepoweredRookie and Concorde Thank this.
  12. Jul 13, 2024 #10
    goga

    goga Heavy Load Member

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    Nov 11, 2021
    Earth..
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    Read the manual.
     
    goga, Jul 13, 2024
    goga, Jul 13, 2024
    #10
    RepoweredRookie Thanks this.
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