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Cooling fan running all the time

Discussion in 'International Forum' started by njwoods, Sep 8, 2013.

Page 2 of 2
  1. Sep 8, 2013 #11
    njwoods

    njwoods Bobtail Member

    24
    5
    Sep 8, 2013
    0
    fan engages as soon as engine turns over and stays on. will try shop air to fan when near shop. hope thats it, clutch is only months old, so should be warranty job
     
    njwoods, Sep 8, 2013
    njwoods, Sep 8, 2013
    #11
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  3. Sep 8, 2013 #12
    58Skylane

    58Skylane Medium Load Member

    388
    276
    Mar 31, 2012
    Cody, WY
    0
    Had the same issue with the continuously running fan. Turned out to be a stuck open thermostat. Have it checked ASAP because the CAT's are designed to run warm (at least my 3406E).
     
    58Skylane, Sep 8, 2013
    58Skylane, Sep 8, 2013
    #12
  4. Sep 9, 2013 #13
    KW Cajun

    KW Cajun Road Train Member

    2,383
    3,652
    Apr 12, 2013
    Copperhead Road
    0
    I'll second Heavyd on looking to see if you have a bad a/c high pressure sensor.
     
    KW Cajun, Sep 9, 2013
    KW Cajun, Sep 9, 2013
    #13
  5. Sep 9, 2013 #14
    cdub304

    cdub304 Light Load Member

    162
    68
    Dec 7, 2009
    Rockford,IL
    0
    Just my penny for thoughts.....if the high pressure switch is not the problem......look for an air line leaking that runs to the fan.....had the same problem and after I think a million dollars found out an air line to the fan was leaking air causing the fan to stay on........smh
     
    cdub304, Sep 9, 2013
    cdub304, Sep 9, 2013
    #14
  7. Sep 13, 2013 #15
    njwoods

    njwoods Bobtail Member

    24
    5
    Sep 8, 2013
    0
    its in the shop now. will update with the answer as soon as i know.

    btw - engine running, applied air from shop to fan - clutch did not disengage - will let you all know if this was only prour suggestionsblem

    in advance - thanks to everyone with your suggestions
     
    njwoods, Sep 13, 2013
    njwoods, Sep 13, 2013
    #15
  8. Sep 14, 2013 #16
    Heavyd

    Heavyd Road Train Member

    7,625
    6,027
    Feb 4, 2009
    0
    If you apply air to the fan and it does not disengage, the clutch is defective, stuck.
     
    Heavyd, Sep 14, 2013
    Heavyd, Sep 14, 2013
    #16
  9. Sep 14, 2013 #17
    dude6710

    dude6710 Road Train Member

    2,162
    622
    Mar 26, 2010
    MN
    0
    Can you see the hub move in and out with the shop air?
     
    dude6710, Sep 14, 2013
    dude6710, Sep 14, 2013
    #17
  10. Sep 14, 2013 #18
    njwoods

    njwoods Bobtail Member

    24
    5
    Sep 8, 2013
    0
    no
    no movement at all
     
    njwoods, Sep 14, 2013
    njwoods, Sep 14, 2013
    #18
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