Fan always running prostar 2012 maxxforce 13

Discussion in 'International Forum' started by martinmunizh, Sep 18, 2022.

  1. martinmunizh

    martinmunizh Bobtail Member

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    Sep 17, 2022
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    My fan always running, never stops, this problem starts when I charge the AC system and scan the truck with DLB and shows the next codes SPN 520868 FMI 5, SPN 520822 FMI 5 and SPN 520823, checked the blower fan and seems ok, when I disconnect the fuse F4 M codes disapear.
     
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  3. InternationalExpert

    InternationalExpert Bobtail Member

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    Mar 1, 2022
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    Did the problem come back? could be just a bad ground based on 520823
     
  4. Heavyd

    Heavyd Road Train Member

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    Feb 4, 2009
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    What fan are you exactly talking about?
     
    martinmunizh Thanks this.
  5. martinmunizh

    martinmunizh Bobtail Member

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    Sep 17, 2022
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    Guys the codes disappear when I noticed a message in DLB an update, just install it and no codes but the EFC is variable speed and still always on but I realized the shop did an improper AC installation, you can see it in the pic, so the truck right now is with the dealer because thats a poor installation
     

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