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.
Fan always running prostar 2012 maxxforce 13
Discussion in 'International Forum' started by martinmunizh, Sep 18, 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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