Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

3406E Fan Constantly On

Discussion in 'Trucks [ Eighteen Wheelers ]' started by RollinCoal02, Jan 23, 2017.

  1. Jan 23, 2017 #1
    RollinCoal02

    RollinCoal02 Bobtail Member

    37
    11
    Dec 28, 2016
    Green Bay, WI
    0
    I have a 97 Kenworth W900 with a cat 3406E that everything worked properly before we replaced the head. Now the engine fan stays running all the time. I can unhook the power to the solenoid on the firewall and the fan will disengage. Plug it in it turns on. The manual fan switch is in the automatic position, with the A/C off.

    I hooked up a Snapon ProLink and shows the engine fan on obviously, just doesn't show what switch is keeping it on. Any ideas?
     
    RollinCoal02, Jan 23, 2017
    RollinCoal02, Jan 23, 2017
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Jan 23, 2017 #2
    rollin coal

    rollin coal Road Train Member

    12,529
    23,860
    Mar 29, 2008
    TN
    0
    Just a guess but the jumper harness that hooks to the high pressure a/c switch may be bad or the high pressure switch itself may be.
     
    rollin coal, Jan 23, 2017
    rollin coal, Jan 23, 2017
    #2
  4. Jan 23, 2017 #3
    TGUNKEL

    TGUNKEL Light Load Member

    223
    156
    Mar 16, 2013
    Spokane,Wa
    0
    Mine did the same thing after a head replacement, the wires on the fan actuator sensor on the back side of the head were on backwards.
     
    TGUNKEL, Jan 23, 2017
    TGUNKEL, Jan 23, 2017
    #3
    HopeOverMope Thanks this.
  5. Jan 23, 2017 #4
    swaan

    swaan Road Train Member

    2,943
    4,371
    Jul 12, 2009
    BC canada
    0
    Check with prolink what your intake air temp is and if its normal.
    Then check to see if high pressure switch for a/c is working and not faulty.
    Water temp reading corectlly on the pro link.

    3 things activate the fan.
    Water temp
    Intake air temp
    A/c high pressure.

    And manual switch on dash of course.
    Keep checking all those along with wiring and you will find it.
     
    swaan, Jan 23, 2017
    swaan, Jan 23, 2017
    #4
  7. Jan 23, 2017 #5
    RollinCoal02

    RollinCoal02 Bobtail Member

    37
    11
    Dec 28, 2016
    Green Bay, WI
    0
    Thanks! got it figured out, the a/c pressure switch wasn't connected,
     
    RollinCoal02, Jan 23, 2017
    RollinCoal02, Jan 23, 2017
    #5
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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