DD15 fan clutch not coming on when engine gets hot

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

  1. Bpat

    Bpat Bobtail Member

    41
    71
    May 8, 2015
    0
    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?
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. oldson81

    oldson81 Bobtail Member

    41
    15
    Apr 8, 2016
    0
    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.
     
  4. wore out

    wore out Numbered Classic

    12,548
    160,503
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    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.
     
  5. MrTrans

    MrTrans Bobtail Member

    15
    6
    Dec 1, 2015
    0
    I hook up my fan with manual switch. The computer sometime's not smart enough.
     
  6. Burke guy

    Burke guy Bobtail Member

    1
    0
    Feb 10, 2019
    0
    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
     
  7. dtomic

    dtomic Bobtail Member

    1
    0
    Jun 26, 2020
    0
    Did you ever figure out the issue. I hVe the same thing going on.
     
  8. JAD1024

    JAD1024 Light Load Member

    57
    20
    Apr 9, 2018
    0
     
  9. JAD1024

    JAD1024 Light Load Member

    57
    20
    Apr 9, 2018
    0
    What was your solution?
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted