Fan constantly running - Ford Powerstroke Diesel Forum
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Old 04-29-2013, 06:01 PM
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Fan constantly running

04 6.0, My fan constantly runs and sounds like a windmill running down the road and killing my fuel mileage and power. I have just replaced the bad egr cooler with a delete kit, oil cooler, water pump and fan clutch. THe only thing i havent replaced is the thermostat. After fixing all the stuff the fan still comes on while driving through town and is running around normal operating temperature. What is the next thing to do or replace? THermostat? I have talked to the ford garage and they do not know. There is no water loss and i am not loosing any out of the resevoir. Any help would be greatly appreciated
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Old 04-29-2013, 07:21 PM
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what is your coolant temperature?

MikeB
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Old 04-29-2013, 09:02 PM
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It's running 195 to 200
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Old 04-30-2013, 05:37 AM
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Does the fan run at high speed all the time? based on the work you have done, I assume you have had the truck for a while. Since you replaced the fan clutch, the flirst place I would look is the wiring to the clutch to see if something is shorted (or open) - I am not sure how the system works (i.e. signal high to run fan or connection to ground to run fan).

Also, what is your EOT? that can also be used to command the fan high (i think).

MikeB
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clutch, fan, hot, thermostat

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