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A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Ford
Satisfied Customers: 6642
Experience:  ASE Master Certified, ASE Advanced Gasoline Engine Performance
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My engine fans wont turn off 2015 f150 5 liter, auto 122000,

Customer Question

my engine fans wont turn off 2015 f150 5 liter
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: auto 122000
JA: Are you fixing your F150 yourself? What have you tried so far?
Customer: topped up the antifreeze
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 11 months ago.
Category: Ford
Expert:  A. Penland replied 11 months ago.

Are both cooling fans running constantly or only one?

Customer: replied 11 months ago.
Expert:  A. Penland replied 11 months ago.

Check the cooling fan relays in the engine bay fuse box. There are 3 of them. Remove either engine cooling fan relay 2 or engine cooling fan relay 3 and see if the fans stop running. If one of these relays are stuck in the on position, both fans will run all the time. See the diagram below.

Customer: replied 11 months ago.
ok I popped the one relay out the fans turned off let sit for a few minutes put back in and it seems fine . Should I replace it.
Expert:  A. Penland replied 11 months ago.

Yes, replace the relay.