My truck started doing the exact same thing a week a week ago, the fans would run on high non stop, also my dash cluster gas mileage digital display started messing up, a few days later my battery crashed. After replacing the battery everything went back to normal. My ford Motorcraft battery was 8 years old. I just wanted to put this out there for others before spending countless dollars on other things. I know this might not always be the case or issue but it was the fix for me.
I got lucky and found both 40amp high and low fuses blown but the question is...what would cause both of them to blow? Hope it doesn't happen again. My truck was overheating at stops.
@Lehew Tech I have a problem with the 2013 Ford Expedition cooling fans. The fans do not work unless the air conditioner is running. The electrical circuit was checked, but I could not find the fan resistor for control cooling fan.
I am having a low speed fan issue. They are not coming on. I removed the same low speed relay that you did and jumped the terminals. My fans did not come on. The right terminal for the low speed fan relay has battery voltage. Anyone have any insight on this?
Hello, I have a F-150 2013Lariat, which overheats only on highway at high speed, so I believe it has troubles with high speed circuit only, do you know if temp sensor triggers high speed relay ?. Thanks for answering. God bless you. BR
@@Debidawg mine was 2yrs & a few months ... but them Artic Blast that hit us made it go quicker ... it was a Die Hard and the Cranking Amps were getting low but when we changed it ... the fans stop doing that
On my truck 2012 ford f150 5.0 Cooling fan 2 will work on low speed but once it gets into high speed cooling fan 1 will sound super loud and #2 won’t work any ideas?
I pulled the low speed relay on my f150 connected the 2 contacts as shown to test both fans. Only the drivers side fan runs. Why isn't the other running?
my fans never go into high speed How would you go about testing the high speed fan ? Do they have a trigger through the coolant temp switch or AC pressure switch?.
Tengo una ford f150 año 2013 y los ventiladores de enfriamiento cuando prendo en aire acondicionado se escucha como turbina de avión como puedo solucionarlo?
I have the same issue. I changed my ac switch but that did not solve the problem. I also checked freon levels and same. Is your AC on? Mine only does this when the AC is on and it's supper hot outside. I read in a forum that that is the way the computer was programmed.
Hey how's it going I had a question so once I put the the if there's continuity at the relay switch but yet remove the continuity could it be the relay switch that's causing the or can it be the temperature sensor
Ok so what if your fan doesn’t come on while driving fuse 15 keeps blowing. But when I jump the relay they do come on but passenger side fan seems to be weaker than driver side fan
Fantastic video. My 2013 F150 suddenly developed "must turn on high speed fan" syndrome for no good reason I can find. Nothing I can test or measure says that this extra fan speed is needed. AC tests out as perfect as I know to test, all temps look perfect at all times yet for some reason, when the ambient gets above 90-ish, and the AC is on, the fan goes to "make all the noise you can" speed. By chance is there a temp sensor somewhere that "helps" the ECU decide this fan needs to be on? Regardless, I've pulled the high speed relay leaving both fans to function normally but stopping the fan's ability to go high speed. I'll monitor it but since the fan NEVER went on in 9 prior years, I'm betting all will be good. Any thoughts, speak up! Many thanks for your concise info. PC
I forgot to mention that all this seemed to become an issue after FORD flashed it for some kind of issue. Not saying, but seems awfully coincidental. Onward and upward.
OK, just did some more testing but more to come yet. Pulling just the High Speed Fan Relay #5 for some reason did not stop "ludicrous" mode in the fans. They still went into crazy and of course Loud As Heck. So started the car this AM and pulled fuse 15 as well as the same relay #5 as before (so now both are out) and so far that seems to have done the trick. My only concern now is this: Do any fans come on if the engine just needs some cooling? Not AC aux fans, but engine cooling fans. I let the car idle for 25 mins and temp never got high IMO. Yes monitored it via the dash as well as with a temp-gun. I've not tried the high temp start but will as expect 105 degree weather this afternoon. Recall for my situation, there seems to be something to do with outside temp as part of the equation. Stand by for that. However, fans go on as soon as I engage the AC and go off shortly after turning AC off. At least that function works. Still remain to see if the fans needed to cool engine come on. We shall see. Oh, and remember, YMMV as this is hardly the most exacting test. Just one that works for me for now.
OK, Removing those two items #5 and #15 may have killed the fan #2 (per this video but the noise is back. Let me explain. As I mentioned above all seemed good during my morning tests with ambient in the mid 80's but I still had concern of the OAT (outside air temp) as I have felt for some time now that this was a factor in the fans but not certain how and almost as interesting, why would it be? If the engine is cold there is no need for fans at all until the AC is activated and at that time I expect the fans to run some as that is normal for any AC system. Now that the excessive fan noise was back, I opened the hood to see what was up and indeed the previously pulled fuse and relay (#15, 5) had stopped fan #2 (my mind says the larger of the two but not sure. I'll have to check) so this noise, the really big noise, was coming from fan #1 (smaller one I think) this is the fan on your right as you stand in front of the truck looking into the engine compartment. This surprised me so I quickly installed the fuse and relay (the #15, 5) which as you'd imagine turned that fan #2 on full force. Oddly, its added noise sounded a level lower than fan #1 so I then decided to pull the relay #85 which is the one he points to in the lower right hand side of the pictures in his videos. This fan is the "low fan control" relay. This cut the overall noise significantly. With only fan #2 running now, still in silly mode, I drove the truck around for about 35 miles in 103 f heat. Engine stayed cool, AC still cooled exactly as it has for 10 years now. All this tells me I've got some more work to do to figure this out. First off, no way do these fans need to run so hard. OK, maybe in Dubai but even in the warm climate of Texas, the last 9 years have said NOPE, not needed. I'm going to test the AC system again but don't expect much. Even then I may change the expansion valve for grins and giggles but along the way I'll see if I can't track down a ford technician who can say "yea, there is OAT sensor that sends info to the fan controller. I've no understanding of why the OAT affects the fans as it does. Probably a combo of things but still, my gut thinks that the FORD flash has something to do with this on my truck. 9 years quiet running, reflashed and the BOOM, noisy fans and to the bet of my ability all else is still good. Last item. I may simply replace the fans with new high performance quiet fans wired to activate with the AC and to activate when the engine gets warm enough to need more air drawn over the radiator. And yes, I've been staying at Holiday Inn Expresses lately so I do have the needed education. OK, thats it. I'll keep the info coming. Any thoughts and please share with me so I don't have to work on this forever.
Hi and thanks for the video. My problem with my f150 2013 is the fans are running high speed pretty much all the time when temperatures are 0 or over. Now the a/c switch was replaced this week but the problem came back. Trying to diagnose why my fans are running so high. Would appreciate some kind of hint or troubleshooting. Thanks in advance
My fan just started kicking on. Doesn’t stay on continuously, but it’s kicked on twice in the last couple weeks? Any ideas if it’s maybe a relay beginning to go out? Or might be a fuse? Temp gauge on dash is not getting hot and no engine light coming on either. Thanks for any info.
Hey same issue where it was occasional and now all the time. I removed that low-speed relay he showed, swapped it and no issues since. Hopefully that helps you
Fans run full blast on my 2013 5.0. Haven't shut off in 2yrs since I replaced the water pump. I've tried a new Ford thermostat, new intake manifold, new ac pressure switch, everything. Still won't shut off unless I turn the truck off. I'm at a dead-end.
@@kennethdurbin3385 just found another video. May have a restriction in the system causing constant high pressure on the high side. Put it in some guages without truck running and should be equal. If not, something is clogged and preventing from equalizing
@@dbocain3236 yeah I added ac refrigerant a few months ago when I changed the clutch and thought I overcharged it. So I used a screwdriver to push the pin down and release pressure and refrigerant to normal levels and it still didn't fix it. I think I'm just gonna take it to the dealer.
@@kennethdurbin3385 Dodge? You mean Fiat junk? Dodge is the most unreliable junk out there. The only reason why their heavy-duty trucks are decent is because of the Cummins engine because it is NOT built by Fiat.
Had this same problem. I removed the low speed relay and it shut them off. When I put it back in it seemed to work again. Going to get a new low speed relay and hopefully it wont happen again. Did you find a fix?
My truck started doing the exact same thing a week a week ago, the fans would run on high non stop, also my dash cluster gas mileage digital display started messing up, a few days later my battery crashed. After replacing the battery everything went back to normal. My ford Motorcraft battery was 8 years old. I just wanted to put this out there for others before spending countless dollars on other things. I know this might not always be the case or issue but it was the fix for me.
Wow the battery ... mine just started the fuel gauge thing a few weeks ago now its the fans 🤦🏽♂️🤦🏽♂️🤦🏽♂️
I couldn’t find a damn wiring diagram for my truck, but you saved the day!! Thank you sir!
You saved me a $150 diagnosis fee. Blown fuse for all the relays was the issue. I missed that one!
Which fuse was it?
Solid Explanation!!
You are a God send my good sir. Thank you 😊
Thank you very much for providing this information. It was very helpful to me.
Fans work only when a.c. is on
Great video!!! Found the blown fuse and fixed for 6$.
@@kevingroth4811 which fuse was it ? Or was it main relay ?
Thank you so much for you help ..God bless you 🙏
I got lucky and found both 40amp high and low fuses blown but the question is...what would cause both of them to blow? Hope it doesn't happen again. My truck was overheating at stops.
Why is your fuse box so much different than mine? I've got a 2013 with a 3.5
@Lehew Tech I have a problem with the 2013 Ford Expedition cooling fans. The fans do not work unless the air conditioner is running. The electrical circuit was checked, but I could not find the fan resistor for control cooling fan.
thank you so much mark mangano dependable auto
Thank you very much
Any idea what to switch when my cooling fan comes on and won’t shut off till I turn my truck off?
Same problem here any help?
@@riverhillkrzzy did you find problem?
Thanks 🙏 it was the low reley
I am having a low speed fan issue. They are not coming on. I removed the same low speed relay that you did and jumped the terminals. My fans did not come on. The right terminal for the low speed fan relay has battery voltage. Anyone have any insight on this?
Hello, I have a F-150 2013Lariat, which overheats only on highway at high speed, so I believe it has troubles with high speed circuit only, do you know if temp sensor triggers high speed relay ?. Thanks for answering. God bless you. BR
Thanks for the demostration. I was missing fuse # 15. I added one but didn't notice any difference. What does fuse #15 do?
Call is spare fuse
What do think is going on if the fans kick on when the trucks move ....they will run for about 20 mins before they cut off
My problem also. Did u find out an answer?
@@Debidawg the battery was going bad 🤦🏽♂️🤦🏽♂️🤦🏽♂️ go to Auto Zone and have it tested ... Its crazy but thats what it was
@@og_2dolla ok ty. My battery only 3 years old but I’ll check 👍
@@Debidawg mine was 2yrs & a few months ... but them Artic Blast that hit us made it go quicker ... it was a Die Hard and the Cranking Amps were getting low but when we changed it ... the fans stop doing that
@@og_2dolla ok, ty! I live rural, I sure don’t want to get stuck. I’ll get it checked asap. 😊
On my truck 2012 ford f150 5.0 Cooling fan 2 will work on low speed but once it gets into high speed cooling fan 1 will sound super loud and #2 won’t work any ideas?
Very good video!
One of my fan stop working when I turn the AC on. The other fan makes a lot of noice. How to fix that?
Please help me out. Thanks.
i have the exact same problem, is not the a/c pressure switch or the Freon. did you figure out the problem??
@@vickjohn9493 I’ve got the same problem did you if it
Have the same issue did you fix it
Are you really wearing a tudor black bay bronzo while fixing the car?! , respect😁
Should both fans be on at the same time
Thanks
Gracias 100% efectivo
Tenía que pagar 700 dlls y ahora solo 20
I pulled the low speed relay on my f150 connected the 2 contacts as shown to test both fans. Only the drivers side fan runs. Why isn't the other running?
My truck is one just like that, and the electric fans don't turn on, what could it be?
GREAT VIDEO PERFECT
my fans never go into high speed How would you go about testing the high speed fan ? Do they have a trigger through the coolant temp switch or AC pressure switch?.
Tengo una ford f150 año 2013 y los ventiladores de enfriamiento cuando prendo en aire acondicionado se escucha como turbina de avión como puedo solucionarlo?
Hi I ave a 2010 f150 5.4 and my problem is that the are always in low speed even when temperature is high.
What was your fix - I have the same problem
I have the same problem 😕
Fan 2 runs on low when truck is started but turns off when fan 1 switches to high. Ideas?
I have the same issue. I changed my ac switch but that did not solve the problem. I also checked freon levels and same. Is your AC on? Mine only does this when the AC is on and it's supper hot outside. I read in a forum that that is the way the computer was programmed.
Having same issue
Thank you!
Hey how's it going I had a question so once I put the the if there's continuity at the relay switch but yet remove the continuity could it be the relay switch that's causing the or can it be the temperature sensor
Ok so what if your fan doesn’t come on while driving fuse 15 keeps blowing. But when I jump the relay they do come on but passenger side fan seems to be weaker than driver side fan
Fantastic video. My 2013 F150 suddenly developed "must turn on high speed fan" syndrome for no good reason I can find. Nothing I can test or measure says that this extra fan speed is needed. AC tests out as perfect as I know to test, all temps look perfect at all times yet for some reason, when the ambient gets above 90-ish, and the AC is on, the fan goes to "make all the noise you can" speed.
By chance is there a temp sensor somewhere that "helps" the ECU decide this fan needs to be on? Regardless, I've pulled the high speed relay leaving both fans to function normally but stopping the fan's ability to go high speed. I'll monitor it but since the fan NEVER went on in 9 prior years, I'm betting all will be good.
Any thoughts, speak up! Many thanks for your concise info. PC
I forgot to mention that all this seemed to become an issue after FORD flashed it for some kind of issue. Not saying, but seems awfully coincidental. Onward and upward.
OK, just did some more testing but more to come yet.
Pulling just the High Speed Fan Relay #5 for some reason did not stop "ludicrous" mode in the fans. They still went into crazy and of course Loud As Heck.
So started the car this AM and pulled fuse 15 as well as the same relay #5 as before (so now both are out) and so far that seems to have done the trick. My only concern now is this: Do any fans come on if the engine just needs some cooling? Not AC aux fans, but engine cooling fans. I let the car idle for 25 mins and temp never got high IMO. Yes monitored it via the dash as well as with a temp-gun.
I've not tried the high temp start but will as expect 105 degree weather this afternoon. Recall for my situation, there seems to be something to do with outside temp as part of the equation. Stand by for that. However, fans go on as soon as I engage the AC and go off shortly after turning AC off. At least that function works.
Still remain to see if the fans needed to cool engine come on. We shall see. Oh, and remember, YMMV as this is hardly the most exacting test. Just one that works for me for now.
OK, Removing those two items #5 and #15 may have killed the fan #2 (per this video but the noise is back. Let me explain.
As I mentioned above all seemed good during my morning tests with ambient in the mid 80's but I still had concern of the OAT (outside air temp) as I have felt for some time now that this was a factor in the fans but not certain how and almost as interesting, why would it be? If the engine is cold there is no need for fans at all until the AC is activated and at that time I expect the fans to run some as that is normal for any AC system.
Now that the excessive fan noise was back, I opened the hood to see what was up and indeed the previously pulled fuse and relay (#15, 5) had stopped fan #2 (my mind says the larger of the two but not sure. I'll have to check) so this noise, the really big noise, was coming from fan #1 (smaller one I think) this is the fan on your right as you stand in front of the truck looking into the engine compartment.
This surprised me so I quickly installed the fuse and relay (the #15, 5) which as you'd imagine turned that fan #2 on full force. Oddly, its added noise sounded a level lower than fan #1 so I then decided to pull the relay #85 which is the one he points to in the lower right hand side of the pictures in his videos. This fan is the "low fan control" relay. This cut the overall noise significantly.
With only fan #2 running now, still in silly mode, I drove the truck around for about 35 miles in 103 f heat. Engine stayed cool, AC still cooled exactly as it has for 10 years now. All this tells me I've got some more work to do to figure this out. First off, no way do these fans need to run so hard. OK, maybe in Dubai but even in the warm climate of Texas, the last 9 years have said NOPE, not needed.
I'm going to test the AC system again but don't expect much. Even then I may change the expansion valve for grins and giggles but along the way I'll see if I can't track down a ford technician who can say "yea, there is OAT sensor that sends info to the fan controller. I've no understanding of why the OAT affects the fans as it does. Probably a combo of things but still, my gut thinks that the FORD flash has something to do with this on my truck. 9 years quiet running, reflashed and the BOOM, noisy fans and to the bet of my ability all else is still good.
Last item. I may simply replace the fans with new high performance quiet fans wired to activate with the AC and to activate when the engine gets warm enough to need more air drawn over the radiator.
And yes, I've been staying at Holiday Inn Expresses lately so I do have the needed education. OK, thats it. I'll keep the info coming. Any thoughts and please share with me so I don't have to work on this forever.
Can you help me to locate the temperature sensor for a 2014 F150, I’m having trouble finding it
Hi and thanks for the video. My problem with my f150 2013 is the fans are running high speed pretty much all the time when temperatures are 0 or over. Now the a/c switch was replaced this week but the problem came back. Trying to diagnose why my fans are running so high. Would appreciate some kind of hint or troubleshooting. Thanks in advance
Check your engine cooling temp sensor
Lehew, please help us figure out the high fan speed not wanting to turn off.
Any answer?
Thank you
My fan just started kicking on. Doesn’t stay on continuously, but it’s kicked on twice in the last couple weeks? Any ideas if it’s maybe a relay beginning to go out? Or might be a fuse? Temp gauge on dash is not getting hot and no engine light coming on either. Thanks for any info.
Hey same issue where it was occasional and now all the time. I removed that low-speed relay he showed, swapped it and no issues since. Hopefully that helps you
I have a 2016 f150 and when I turn on ac fans go on high nonstop. Could it be a fuse /relay related issue? @lehew
Advice for a fan that runs too often? Just replaced the water pump too. Thanks.
if you also replaced the thermostat make sure it's "ford" not after market third party.
my fans are ON all the time, why?
Fans run full blast on my 2013 5.0. Haven't shut off in 2yrs since I replaced the water pump. I've tried a new Ford thermostat, new intake manifold, new ac pressure switch, everything. Still won't shut off unless I turn the truck off. I'm at a dead-end.
I am dealing with this same issue. Let me know if you find the solution please
@@dbocain3236 found multiple solutions....set it on fire, shut the truck off in drive-thrus or trade the POS in for a Dodge. You're welcome.
@@kennethdurbin3385 just found another video. May have a restriction in the system causing constant high pressure on the high side. Put it in some guages without truck running and should be equal. If not, something is clogged and preventing from equalizing
@@dbocain3236 yeah I added ac refrigerant a few months ago when I changed the clutch and thought I overcharged it. So I used a screwdriver to push the pin down and release pressure and refrigerant to normal levels and it still didn't fix it. I think I'm just gonna take it to the dealer.
@@kennethdurbin3385 Dodge? You mean Fiat junk? Dodge is the most unreliable junk out there. The only reason why their heavy-duty trucks are decent is because of the Cummins engine because it is NOT built by Fiat.
Hello my ford 2013 f150 fans are new the right side fan came on but the one on the left toward the battery not coming on
You find out the problem?
Will it mess with AC cuz my is not working
Fans not working and I have no power at #10 fuse. Can’t find what supplies power to that one
@kinglangren Did you figure it out brother? I have the same problem except it’s fuse 63 that isn’t getting power
Will a bad low speed relay make the fans run on high all the time? My fans come on from start up and are VERY loud.
Same did u figure it out ??
Same. What did you do
After some digging, 8 found that the low side pressure sensor was shorted. I replaced that and it started running correctly.
Why is my fan always on high
My fans turn in high soon as I turn on truck
My cooling fan are still running after I turn off my truck
Hi my fans are running on high speed even when the car is shut of any idea I have to remove the battery to I stop them
Had this same problem. I removed the low speed relay and it shut them off. When I put it back in it seemed to work again. Going to get a new low speed relay and hopefully it wont happen again. Did you find a fix?
@@samfeyder9041 yeah done it was a fault relay while ago the car over heat in my desert run that apparently damaged the relay so I replaced it
My 13 f150 doing same thing had to remove the rely to shut them off.
@samfeyder9041 was your f150 fixed?
@@SamSongco-hn2lz yeah just buy new rely 👍👍
Low fan relay has no power when pliers get contact