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F-150 Cooling Fan Issue

Posted on 12/12/23 at 3:12 pm
Posted by DanielBooned
Tennessee
Member since Jun 2023
39 posts
Posted on 12/12/23 at 3:12 pm
I’ve got a 16 5.0 f150. My engine cooling fan kicked on loudly over the weekend, and is running the whole time, either parked or driving. It’s cold, and AC is off. I flushed coolant and added new coolant and that didn’t fix issue. I’m certain it’s not the actual engine over heating and just a sensor or thermostat issue.

Fan is loud af, anyone else had this issue? Thing is obnoxiously loud.
Posted by keakar
Member since Jan 2017
30152 posts
Posted on 12/12/23 at 3:19 pm to
quote:

F-150 Cooling Fan Issue


it runs off of a sensor in the radiator

your sensor switch must be stuck or broken

unplug it and see if it stops, if it does, replace the sensor
Posted by pdubya76
Sw Ms
Member since Mar 2012
6149 posts
Posted on 12/12/23 at 3:23 pm to
My 06 Chevy 1500 did exactly that. They threw parts at it to no avail. It turned out to be some corrosion on a terminal for the main computer.
Posted by 4LSU2
Member since Dec 2009
37568 posts
Posted on 12/12/23 at 3:27 pm to
Check for a cooling system leak.

Do you notice the heat delayed turning hot now that it it winter time?

Add anti-freeze to the radiator. My suspicion is you will be shocked at how much it will hold once you fill it.
Posted by Bawpaw
Member since May 2021
1150 posts
Posted on 12/12/23 at 5:51 pm to
Change the relay
Posted by TigersnJeeps
FL Panhandle
Member since Jan 2021
1960 posts
Posted on 12/12/23 at 9:13 pm to
Our 2013 does that periodically as well.

Dealer checked it out and said it's operating normally.

That was about 3 years ago....
Posted by gmshooter
Louisiana
Member since Nov 2011
388 posts
Posted on 12/12/23 at 9:25 pm to
Change the thermostat. I just went thru this on the wifes gmc yukon. Went thru 4 sensors that looked like they kept failing. Had to unplug the battery to reset it. Changed the thermostat and problem solved.
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