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Cooing fans

986 Views 14 Replies 5 Participants Last post by  Topgeye
2010 Escape 3.0 cooling fans come on at start up when engine is cold and seem to run constantly until key is turned off. No ac/defroster on,no over heating,no money light showing or codes being thrown by my scanner. I have read several causes this may entail but instead of just throwing parts at it and not resolving the problem I am asking if anyone here has had this problem and if so what the fix was for you. So, now that I'm totally winded from typing all this I'll set back and see what you all have to tell me.
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A little late update on my problem. I noticed the ac clutch wasn't kicking on. I found a relay for the compressor on the power board. Just for s & g's I traded it out with another one like it. For some reason I can't explain (maybe someone here can explain it to me) the clutch started working and the fans quit coming on when engine is cold. They do come on when ac or defroster is turned on like their supposed to. Works, for now anyway. Like I was told, I can just guess.
Thanks for the update, Topper! Seriously, there is not enough posted follow ups on problems.
I'm not sure what you're asking now. Sometimes the relays malfunction, not just stop working- that would send a code.
Sounds like a stuck relay
Squirrel was right in the very beginning. Give that squirrel a nut. ( :
People that do this for a living, or have seen it before on another car don't have to always go to the diagnostic tool. Typically whenever something messes up, first thing you check are the fuses, second are the relays. Always when applicable. ( :
Then start asking the neighbors in your favorite city… ( ;
So tell me, who are the people in your neighborhood, in your neighborhood, in your neighborhoooood ( :
I understand all you are saying but wouldn't it take one of those high dollar scanners that would take me four years of college to learn to operate would it not? My little hand held scanner doesn't go that deep. It will bring up codes that are basic. Like I said in my OP, It does not show any codes relating to the cooling fan. The money light has only came on once for a bad wheel speed sensor which I replaced and the code went away. Is there any chance that the AC system might have anything to do with this. Just asking.That's another story by its self.I just recently purchased this vehicle and shock of shocks, I don't believe the seller told me all I needed to know about it and yes I asked. But all in all it's still a pretty good suv.
You don't have to go to college for the smarter diagnostic tools. They are really smart/user intuitive. You don't need a snap on either ( :
They are great trucks when maintained!
I hope you don't live in the salt belts
I guess if there was a question there it would be, what would be the connection between the ac relay and the fans coming on at cold start and running all the time. I just thought that someone could connect the dots for me. What I didn't tell you was that I researched causes for the problem and followed up on the most common causes. Traded out the relays. Main. fan 1, fan 2 and changed out the CHT sensor. Nothing changed. The ac relay was just a shot in the dark. For now it's working as designed. No complaint there.
My guess is A/C power backfed to the fans, turning them on. You would have to look at circuitry schematics for the relationship to one another-beyond that relay.
That turning on the Defroster/AC makes the fans come-stay on, seems logical it would work the other way too. I wonder if it failed the other way, the compressor would come on and stay on?

It's good to know, I would not have initially thought of the AC compressor relay for the fan issue. I would have thought fan relays like you did
It doesn't happen often, but I have always found it odd when things fail on, normally they stop…lol
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