shaun mac Posted February 24, 2018 Share Posted February 24, 2018 hi guys i have a new 2017 rawhide. it has an electric engine fan that screams wide open when i start the truck eventually it seems like it slows down but never shuts off. my dealers thinks i'm nuts. etech says it should run wide open for 1o minutes when its cold. i get that but what about the next 13 hours the truck runs. any ideas for a bad setting in the ecm or something else Quote Link to comment Share on other sites More sharing options...
kscarbel2 Posted February 24, 2018 Share Posted February 24, 2018 Given it's a new 2017 truck, this is a warranty matter for a Mack brand dealer to resolve. If no Mack brand dealer can address it to your satisfaction, I suggest you contact Mack brand customer satisfaction at +1 (866) 298-6586. Get the customer after-sales support from the manufacturer that you paid for in purchasing a new truck. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted February 24, 2018 Share Posted February 24, 2018 The electric viscous fan never fully disengages. This is normal. The only other option on a Mack now is the Horton 2 speed air fan clutch. And even it still spins pretty good when disengaged. On the electric viscous fan, the tech can view fan speed and turn fan on and off with Tech Tool. Your truck is to new for the problematic Borg Warner electric viscous fan. The Behr fan that you have is very trouble free. 1 Quote Link to comment Share on other sites More sharing options...
shaun mac Posted February 24, 2018 Author Share Posted February 24, 2018 This fan seems counter productive put it on for better fuel mileage then never let it go in to neutral. The truck is in the shop now hopefully they can figure it out. Just seems like it always has power to it Quote Link to comment Share on other sites More sharing options...
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