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Engine Fan stays on

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Sktrucker89, Jul 7, 2017.

  1. Jul 7, 2017 #1
    Sktrucker89

    Sktrucker89 Bobtail Member

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    Hi i have a 2013 cascadia dd13. Engine fan constantly stays on never seem to #### off. Does anyone know why would that be happening. And how to fix it. Thanks in advance
     
    Sktrucker89, Jul 7, 2017
    Sktrucker89, Jul 7, 2017
    #1
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  3. Jul 7, 2017 #2
    Roberts450

    Roberts450 Road Train Member

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    Where are you?
     
    Roberts450, Jul 7, 2017
    Roberts450, Jul 7, 2017
    #2
  4. Jul 8, 2017 #3
    Sktrucker89

    Sktrucker89 Bobtail Member

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    Mar 9, 2016
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    Southern California
     
    Sktrucker89, Jul 8, 2017
    Sktrucker89, Jul 8, 2017
    #3
  5. Jul 8, 2017 #4
    Roberts450

    Roberts450 Road Train Member

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    If its hot enough outside and you're running the A/C full blast it might not get cool enough to shut off. My guess is thats the case aling with the radiators needing the air side cleaned to remove all the dirt so the air can pass thru.
     
    Roberts450, Jul 8, 2017
    Roberts450, Jul 8, 2017
    #4
  7. Jul 8, 2017 #5
    Sktrucker89

    Sktrucker89 Bobtail Member

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    But even when not running ac and drove in cooler temps at night it never shuts off. I m thinking its something else
     
    Sktrucker89, Jul 8, 2017
    Sktrucker89, Jul 8, 2017
    #5
  8. Jul 8, 2017 #6
    Roberts450

    Roberts450 Road Train Member

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    Is there a switch to turn it on manually? If not srart with the fan clutch relay and then move on to coolent temp sensors, a/c pressure switches, and possibly even EGR coolent temp sensors as something is telling it to turn on. Might have to find a place to get into the ecm and see what its saying.
     
    Roberts450, Jul 8, 2017
    Roberts450, Jul 8, 2017
    #6
  9. Jul 8, 2017 #7
    Sktrucker89

    Sktrucker89 Bobtail Member

    32
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    Mar 9, 2016
    0
    Yeahhh .. thts wht my thoughts are that plugging into ecm n see whats commanding the fan
     
    Sktrucker89, Jul 8, 2017
    Sktrucker89, Jul 8, 2017
    #7
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