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DD15 fan clutch not coming on when engine gets hot

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Bpat, Apr 9, 2016.

  1. Apr 9, 2016 #1
    Bpat

    Bpat Bobtail Member

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    May 8, 2015
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    I have a 2012 cascadia with dd15 engine..just started overheating on last trip..The fan is not coming on when reaching the hot temperature. I've been troubleshooting problem, I can get the clutch to engage by taking off the lead from the fan clutch solenoid. This tells me the clutch is ok. Solenoid is a normally closed circuit.....this also seems that the solenoid is ok also.....what else tells this solenoid to allow the fan to come on?
     
    Bpat, Apr 9, 2016
    Bpat, Apr 9, 2016
    #1
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  3. Apr 9, 2016 #2
    oldson81

    oldson81 Bobtail Member

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    Apr 8, 2016
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    In pretty sure a signal from the computer tells the fan to come on when engine get hot. Also controlled via a/c circuit. Check the filter on the air solenoid isn't blocked up with oil also. That will stop the fan coming on. Had this numerous times on my kenworths.
     
    oldson81, Apr 9, 2016
    oldson81, Apr 9, 2016
    #2
  4. Apr 9, 2016 #3
    wore out

    wore out Numbered Classic

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    Most of the time there will be a separate temp sending unit for the gauge, one for the fan then a sensor for the ecm.
     
    wore out, Apr 9, 2016
    wore out, Apr 9, 2016
    #3
  5. Apr 9, 2016 #4
    MrTrans

    MrTrans Bobtail Member

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    Dec 1, 2015
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    I hook up my fan with manual switch. The computer sometime's not smart enough.
     
    MrTrans, Apr 9, 2016
    MrTrans, Apr 9, 2016
    #4
  6. Feb 10, 2019 #6
    Burke guy

    Burke guy Bobtail Member

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    Feb 10, 2019
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    I have a 2016 Freightliner with a DD 15. I have replaced the fan solenoid,but fan will not kick on till temp gets to the red. help
     
    Burke guy, Feb 10, 2019
    Burke guy, Feb 10, 2019
    #6
  7. Jun 26, 2020 #7
    dtomic

    dtomic Bobtail Member

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    Jun 26, 2020
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    Did you ever figure out the issue. I hVe the same thing going on.
     
    dtomic, Jun 26, 2020
    dtomic, Jun 26, 2020
    #7
  8. Feb 20, 2021 #7
    JAD1024

    JAD1024 Light Load Member

    57
    21
    Apr 9, 2018
    0
     
    JAD1024, Feb 20, 2021
    JAD1024, Feb 20, 2021
    #7
  9. Feb 20, 2021 #8
    JAD1024

    JAD1024 Light Load Member

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    Apr 9, 2018
    0
    What was your solution?
     
    JAD1024, Feb 20, 2021
    JAD1024, Feb 20, 2021
    #8
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