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Radiator fan stays on

Tiny
IMSTUNNA1
  • MEMBER
  • 2011 FORD FUSION
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 670 MILES
I have a 2011 ford fusion and my radiator fan comes on when I start my car and stays on constantly until I turn the car off. What would the problem be. There are no warning lights on either.
Saturday, March 19th, 2011 AT 6:19 PM

14 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

It sounds like you have a fan control module that is out which is part of the cooling fans, here is the radiator fan wiring diagrams so you van see how the system works.

ENGINE CONTROL COMPONENTS

Cooling Fan Control
The PCM monitors certain parameters (such as engine coolant temperature, vehicle speed, A/C ON/OFF status, A/C pressure) to determine engine cooling fan needs.

For variable speed electric fan(s):

The PCM controls the fan speed and operation using a duty cycle output on the fan control variable (FCV) circuit. The fan controller (located at or integral to the engine cooling fan assembly) receives the FCV command and operates the cooling fan at the speed requested (by varying the power applied to the fan motor).

The fan controller has the capability to detect certain failure modes within the fan motors. Under certain failure modes, such as a motor that is drawing excessive current, the fan controller shuts OFF the fans. Fan motor concerns may not set a specific DTC. With the fan motor disconnected from the fan controller, voltage may not be present at the fan controller.

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
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Saturday, March 19th, 2011 AT 6:45 PM
Tiny
EDDEEDALE
  • MEMBER
  • 2 POSTS
  • 2007 FORD FUSION
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 38,160 MILES
2007 ford fusion radiator fan stays on all the time. Even when the key is ternd off
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check the fan relay, it is most likely sticking causing the fans to stay on.
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
EDDEEDALE
  • MEMBER
  • 2 POSTS
How do I "unstick it?
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
You need to replace the relay to fix it.
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If it is stuck, it has to be repaced.
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
TAYLOTMAN8717
  • MEMBER
  • 2 POSTS
So I have a 2007 ford fusion 2.3L and the radiator fan runs all the time. I changed the relay the coolant temp sensor. The control box on the radiator. The water pump. The thermostat and of course the coolant and I flushed out the heater core. The fan still runs. Please help
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
BCHANDLER
  • MEMBER
  • 2 POSTS
  • 2006 FORD FUSION
  • 105,000 MILES
Whenever the engine is running the engine cooling fan runs. It started when I used the AC. When I cut off the AC the cooling fan continued to run. Now it runs all the time. I have removed a switch that goes to the cooling fan itself. When this switch removed the cooling fan does not run.
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
TAYLOTMAN8717
  • MEMBER
  • 2 POSTS
Please email me at taylorman8717@Gmail. Com
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Have you checked the fan relay? And, I'm not sure what switch you removed. Can you explain?
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
You need to start a new question, and please be sure to list the engine size and mileage. This was an old private conversation between just a few people. None of the other experts are going to see your addition or have a chance to reply. That won't get you the help you want.
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
BCHANDLER
  • MEMBER
  • 2 POSTS
I removed the relay that is a 60 amp from the box under the hood and changed it with another and the fan still operates.
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
JMAG
  • MEMBER
  • 1 POST
  • 2006 FORD FUSION
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 60,000 MILES
This car was recked we just got it back togather and the fans run all the time. There is a valve or switch that was cracked in the reck. It's mounted on the end of the head and next to the throttle body. There is a water line from the throttle body to this valve. Alldata doesn't show the part. Could it effect the fans running?
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
It sounds like the temp switch. Disconnect it and see if the fan stops.

Let me know what you find.
Joe
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Thursday, July 18th, 2019 AT 11:00 AM (Merged)

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