lugnut Posted May 14, 2013 Share Posted May 14, 2013 I have a 2012 gu713 with mp7 it has the multi speed electric clutch fan.fan works on low speed engine temp fine at idle or low ROMs.under a load the high speed doesn't work and truck over heats....new fan $ 800.00 what I want to know is can there be anything else causing the problem such as a temp sensor?do I need to change the clutch fan? And all gauges in cab work fine no codes Quote Link to comment Share on other sites More sharing options...
Mackpro Posted May 14, 2013 Share Posted May 14, 2013 If its the Borg Warner Cool Logic fan its junk. We have a pile of bad ones here and warranty doesnt even ask for them back. I have put 2 on my friends 2012 CHU. Horton makes a kit to swap it over to one of their air fan clutches. Quote Link to comment Share on other sites More sharing options...
lugnut Posted May 14, 2013 Author Share Posted May 14, 2013 So its more likely the clutch fan and not some electric sensor problem. Quote Link to comment Share on other sites More sharing options...
lugnut Posted May 14, 2013 Author Share Posted May 14, 2013 And yea its Borg Warner Quote Link to comment Share on other sites More sharing options...
Mackpro Posted May 14, 2013 Share Posted May 14, 2013 Does it look like oil mist/leak on the front of the engine? These fan clutches leak oil and it blows on the front of the engine. There might not be a drop of oil on the fan clutch its self but the front of the head or valvecover will have a mist on oil on it. Then again sometimes they dont leak. The newest version/part# seem to be lasting alittle longer. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted May 14, 2013 Share Posted May 14, 2013 If any body is wants the Horton change over to air fan.fan clutch.pdf Quote Link to comment Share on other sites More sharing options...
lugnut Posted May 14, 2013 Author Share Posted May 14, 2013 No oil but trucks get washed weekly so no telling... Quote Link to comment Share on other sites More sharing options...
Jesse29 Posted July 27, 2023 Share Posted July 27, 2023 I’m having the exact same issue. Just replaced the fan clutch and the truck can operate but is still running hot. The only time the fan will kick on is in low gears with high rpms. Is there a sensor or switch that controls fan engagement based on temperature? Quote Link to comment Share on other sites More sharing options...
Mackpro Posted July 28, 2023 Share Posted July 28, 2023 The engine ECM looks at the coolant temp and intake manifold temp and AC high pressure switch and commands the fan to engage. If you unplug the fan harness connector from the fan the fan should speed up/engage. Coolant thermostat and water pump and radiator clogged externally ( behind after cooler) is the more common over heating problems. Is this a farm use truck? Quote Link to comment Share on other sites More sharing options...
fjh Posted July 28, 2023 Share Posted July 28, 2023 As mentioned change it out to the air fan they are rubish! Do it once and be done with it! Chances are the new one will be kick right out of the box! Note you will have to have the program changed to suit the air fan! Quote Link to comment Share on other sites More sharing options...
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