WOW! This guy gives such a great class... The communications ability is so straight forward yet very complete. Great job taking the extra steps to explain (quickly and concisely) all the key words/terms so that those of us with very limited automotive knowledge and skills could still nonetheless, after your quick explanation and demonstration, complete the task with relative easy... THANK YOU! Please keep making videos, you're outstanding at it!!!
I had a hunch and you confirmed that a faulty fan switch could also keep fans continuously running. Though my coolant temp maintained between 185-195 degrees with my fan running continuously, I guess the only problem I could eventually see is shortening the fan life.
I changed my thermostat twice (was told I put the wrong one in the first time), now I noticed this in my car, also it is GM and from googling this, it seems to be a typical GM problem. Gonna have to look into this closely. Great video! Subbed!
Ry the car guy My car does the same thing, but the fan does not turn on until it reaches 198F, then the fan turns at high speed and it will never shut off unless i turn the engine off. I have a mustang gt 2007. Can it be the cylinder temperature sensor? When i turn the ac, the low speed fan turns on as it should, and when i turn the ac off, the low speed fan shuts off, which seems right.
I desperately need your help. My 2016 mustang v6 is having a similar issue, but only when I turn on ac or heat. I can drive the car fine without climate control but as soon as I turn it on, the car chugs and the fans go crazy. It's embarrassing. Any ideas?
Just had this with my car changed the 2 temperature sensors fan was still on. Then changed the resistor. Fan was still on. Bought a new thermostat comes complete with housing unit £17.89 of eBay stuck that in myself pure easy 3 bolts. Seems to have done the trick. My fans off. Warning light is off car running like a dream. You also have to top up coolant so buy 2-3 litres as you lose almost all of it when changing the thermostat. X
Good video.. I am having the same problem with a 2003 Ford Thunderbird. However, my temp gauge sits right were it always has since the car was new.. You didn't address what your temp gauge was doing.. Did it show the car as erroneously running hot? I have a scanner so my next check will be watch the temp on it. This problem started after I added a can of R134 to the A/C. Could that be related and perhaps I overfilled it?
What if I do that and the problem is fixed then a week later it does it again... could it be a bad sensor or is something else causing the fans to stay on
And if problem still continues than you might have an old thermostat where it is stuck open or just old. Might consider changing that only if you still have same problem after this.
yeah I guess. but I'm having this problem and the battery dies. not fun removing the plug or unplugging the battery every time u park. and if u forget you're screwed
@@jaimedelgado7529 there is a retain power relay that allow the car to have power 15 seconds after I turn the ignition 📴, once it's stay on your battery will die, u will need to locate it and replace or remove.
@@Platinumtag first of all I'd like to thank u for your reply ! if what you speak of is the nature of my problem then the radio would also stay on indefinitely. correct ? if the radio turns off then the problem lies elsewhere. correct ? now the fan always stayed on a while after I turn off the ignition. but now the fan will only stop when there is no more juice in the battery. it leads me to believe the problem lies with either : - the resistance is no good - the relay is no good - the temperature sensor is no good am I right to think this way ?
@@jaimedelgado7529 yes if radio turn off and fan stay on its not the retain power relay. Could be fan relay stuck on, on position, pull a relay to see which one turns of the fan. Or u can also unplug the sensor that attach to water hose to see if that turn off the fan but I would think it's not the sensor. More of a relay problem...
Good video. I changed the sensor but the fans are still running. I’ve had no luck with getting the people at the auto parts store to locate a relay. Any suggestions?
2012 nissan titan, radiator fan running constantly, i check using OBD but not throwing any code , i suspect the fan clutch, do you have any suggestions pls help. Thanks
I have the new parts can I test either the coolant fan switch or ECT by just plugging them in without installing them? Or does it need to be in the coolant
If you have been running/driving the vehicle (2014 Caravan), with the A/C or heat on to the rear and then you turn off all climate controls and temp to medium (no heat no cold) and then turn off the vehicle, but then it sounds like something is still running in the rear, maybe a fan for the rear heat/ac, how long should that run for before it stops? Is this normal?
Hi Ry.. great video.. I have a Audi C6 2010 and a few days ago.. the fans came on at startup and is not coming off till i cut off the engine.. the ac and blower is not coming on since this problem.. what do you think could cause this to occur.? Thanks for your time in advance...
I have the same problem. Fan still running minutes after turning vehicle off and A/C blowing hot air. Also fan cuts on as soon as I turn my truck on even with A/C off.
2011 chevy traverse Coolant fans kick on at 216F and turn off at 205F. Isn’t 216F too hot for this engines. I thought the ideal temp was 190-200F, any clue? Please help!
Great video very informative.i will add to always clear any related codes because sometimes they will override the new temp sensor and keep the fans runni
I had a P0119 and after searching found the negative wire from the coolant pump broken & bouncing making the fan kick on with the coolant engine temp fluctuating from 78 degrees to over 230 and back down.
resetting the computer was an important part. after replacing sensor and thermostat the issue was still there till i pulled the negative cable off the battery for a few min then hooked it back up and and fans stopped running when i turned vehicle off.. now im waiting to see if the problem will come back in a few days and just resetting the computer didnt just put it off.
Something to mention is that a broken wire will have same effect. If ya have no difference with fans running always with sensor plugged in or connector off it's a bad wire. :)
Mine stays on even with the key taken out .... I have to pull the battery terminal. It just happened last night after I went thru a car wash - - maybe water caused it. My car is a 2006 C-230. The fan actually behaves properly when the engine is running. Any ideas ? Note: I had been looking at my main fuses in the engine compartment prior to the car wash for a prior issue of the alarm doing off randomly and neglected to put the cover on before closing the hood and going to the car wash. After the car wash I noticed some water drops on the relays and fuses. Dumb mistake by me ..... but it seems that is related to the problem
Hey quick question. I have the same problem with my 2011 Honda Civic. As soon I turned the ignition switch to on position both fans (radiator fan and condenser fan) start running on high speed do you think that I have the same issue? There is no check engine light everything else looks great. Thanks, I really appreciate your videos well explained.
Ry- videos are still looking good and as helpful as always. Have a ‘10 xterra Off Road with 120k miles. It’s time to bite bullet and replace radiator. I noticed you don’t have a video on this from what I can tell. I’ve heard that they can be a slight pain. Have you done this yet on yours or do you plan to? Any pointers? Thanks Buddy
I have a 2016 Silverado Ltz and the radiator fan stays on the entire time the truck is running. Also the ac don’t get cold until 10-30 minutes. Then is blows super cold all day. I changed the coolant temp sensor and disconnected the battery for 10 minutes and it still doing the same thing. I’m not getting any codes and my gauge on the inside is reading correctly. Any ideas?
Hey man help me out here if you will. I have a 1998 Lincoln Continental and I replaced the radiator. Added coolant and removed all air bubbles so that's done. But now I've noticed that after replacing the fans, they stay on constantly even when the engine is at normal operating temperature. Before the job, they would run a while after I turned off the AC. Now they stay on even when I don't have the AC or heater on. What is going on? I've noticed a leaking sensor that is between the exhaust manifold and the engine oil filter. Any ideas on what's going on? They do turn off how ever when i turn the car off. They only turn on during driving and stay on until I turn the car off.
Had to thumbs up 👍🏽 the video b/c the radio fuse under the hood is exactly what the issue was but before that it was also making my ac turn on on ACC mode and blow hard as hell soon as the fuse was replaced with a spare the radio not only kicked on but when in ACC Mode my fan was no longer blowing
I have 2000 Beetle that the fans run even with the engine off and the key out of the ignition, I have to pull the battery cable. Been trying for 2 years to figure it out.......I've replaced fan control module and the temp sensor. No mechanics in my area can figure it out.
I have 2007 chevrolet uplander ls van and the fan is running when it turned on and we changed the sensor then it still on the code said 02 sensor u think the 02 sensor need changed let me know plz
My Logan car radiator fan is running fine in normal climate according to the temperature, but while sunny climate it keeps running..No body could diagnose this issue. I changed thermostat, ac pressure switch but nothing worked...PLEASE HELP
My fan starts after sometime but then keeps on running... Temperature shows in middle... But after few km of running car loosing power when going uphill (I have to switch off ac)... also ac is not tripping as normally it trips when reaching certain temperature. What may be the reason?? Please help.
I have other problem... We removed detectors for fan to keep running at all times! It was intended and was working but now its turning off after some work
My cooling fan keeps running with engine off. The only way to turn it off is to pull out one of the three fuses that controls the cooling fan. Replaced the fuse with a new one but still no luck. No codes being thrown on the diagnostic tool. No coolant leaks, no engine temperature overheating as of yet, just the problem of fan keep running and kills the battery when car is off. Any ideas?
I have a similar problem in my Cavalier 03 2.2 Ecotec. I changed 2 years ago the temperature sensor and the fan turns on 2 lines after 90°, since a few weeks the rpm drops and almost turns off the car. But I noticed that the fan turns on just passing 90° not as it worked before, I think rpm drops because the fan wants to turn on. Do you think it could be the temperature sensor who is causing the trouble again?
Our PT Cruiser fan runs on high all the time after an engine overhaul but only after starting, it stops again as soon as the key is turned off. I swapped the relays out and they are not the problem. The power runs to the fan as soon as the engine starts through the wiring that runs to it, I disconnected the connectors and it stopped but as soon as its reconnected it starts again, the fault seems to be between the ignition and the connector and is not the relay. It also runs with the sensor wires by the thermostat disconnected. Where to from here?
Hi Ry, the electric cooling fan runs constantly when the A/C is on? Excuse my lack of knowledge in cars, it is the first time I notice it. Thank you for your videos.
On my 2004 chevy venture, the cooling fans don't run untill the engine temp gauge is just over 3/4 of what the gauge shows, when they come on, they go till the engine temp is where it is going down the highway, then they turn off, however if I turn on the a.c. they are always on keeping it good engine temp, and if the engine temp gets half way the high speed fans kick on only with the a.c. on, so I don't get what is going on?
Hi please advice I've got 2012 peugeot 3008 1.6 A/T vti petrol my fan allowys on while driving sense starting the engine and when I switched the engine off the fan stay for 5 on then it's off and the battery many times died please help and the car taking so much petrol, thank you
I was wondering why having both fans running constantly irrespective of cold start or warm start after return from garage. In fact, both fans kick in whenever the key is turned to power on position. I guess it is time to change the old temperature sensor too . Thank you.
I have an 11 years old Toyota sedan and has 90k miles on it. When I started the engine everything works fine up until a few minutes then the fan started running in full speed even when I turn off the AC or didn't turn on at all. I have the wait about 5 minutes before the fan is turned off, do you think it's the temperature sensor problem as well?
What about if it runs loud after driving it then it’ll cut off after cutting it off for 5 mins then when she tries to crink it up the battery is dead. So everytime she leaves we have to jumpstart it. The fan will cut on after it warms up but it’s cold outside. It’s normal when she cranks it up. Is it a relay?
I have a 2009 Nissan Altima and the fans are always running even in cold weather startups, but the guage that reads engine temperature still works not over heating and not too cold. My question is can it still be the temperature sensor??
@@gthatkid6035 Im beginning to wonder it's not overheating cause it's super cold outside, and both the fans runs at full speed. I squeezed one of the main radiator hoses with the car on and....Believe it or not the Fan speed was reduced for a few seconds. I think radiator is clogged idk how or water pump is not circulating coolant. I already tried temp sensor, relays and nothing no luck. Hope this helps.
Hi! Can the aux/AC fan be reversed so that air can be pulled out of the vehicle? Ideally, I would like to be able to flip a switch for the fan to push or pull air (of course with AC running the fan should be pushing air in the cabin).
I have a 2008 Ford Fusion, once the fan comes on it is incapable of turning off, this one does not have a relay it has an ecm, I changed the temp sensor and ecm, and I’m having the same problem, any suggestions?
Good morning. My 2007 Pontiac G6 fans coming on and staying on as long as the engine is running. I changed the temperature sensor and it is still doing the same thing. I am going to check the fan relays now.
I have a 2009 ford flex and my cooling fan stays running after the car is turned off for a long period of time it ends up killing my battery what could be the cause of it?
Thats a mixture of problems. First your car is designed to cool the engine a little bit once is off but looks like the temp sensor is dead as well so it doesnt know when to stop
I have the same problem after radiator leaks changed thermostat,radiator hoses and radiator along with a new temperature sensor. Fans running on startup and AC blowing hot air . Any odwas anyone please help thank you.
I have the same problem with the fan running on high whenever the car is running. Could I just buy one censor and plug it in out of the car to see if that is the problem? I believe it has two, one in the engine and one at the lower radiator. I swapped the relays around and it still is happening. Thx.
Yea, I don’t see why not as long as they are the same exact part number. There are also ways to test relays, just look it up on RU-vid if you don’t want to buy the part first.
@@Rythecarguy yeah my car is over heating so I checked the fans they turn on and off I changed the relays and it still doing the same. And now sometimes the fan stays on after I turn the ignition off
I have a 2012 Ford Edge, the problem that I'm having is that as soon as I turn on the air conditioner de fans start running at full speed and stay like that for as long as I drive the car. Even if I shut the ac off the fans will stay on at full speed for a long time. The loud noise is embarrassing. However, If I don't turn on the ac when I first start up the car the fans will work normally. This is bugging me as hell.
i have an 06 silverado 1500 my fans run constantly, i changed the temp sensor, and they still stay on. I have to pull the relay 1 to shut them down , i replaced the relay 1 with a new one still running , my question is this should i just replace all 3 relays ,and hope that works? also when i put the relay back in without the key in they ignition the fans come on, u think this could be a short in the wiring somewhere?? or maybe a short in the fan unit itself??
@@goyitosalazargs ok so here is what i did, i took the computer out of the truck, took it apart checked out the mother board for water damage and such, i saw nothing , i sprayed the pins on the computer itself with QD contact cleaner, as well as the connectors in the truck to the computer, i haven't had a problem since, after doing that i can use the remote to set my alarm that i couldnt use for moths prior to cleaning the connections, i hope this helps , sry for the delay in responding
@@Rythecarguy okay certain sensors I've replaced in the past that have showed it where it's overheating even if the engine is cold. And I've seen the flip side where it's ice cold and the center still reads ice cold
Was wondering if i can make my fans work more efficiently on my 2008 Impala SS both fans turn on but i feel like they dont spin as fast as it should because as soon as i open the hood the engine is hot and no it does not overheat at all my fans are new and thermostat is new as well i just feel like the engine bay can be a bit cooler what can i do?
You should first know what temp your engine is at. Maybe the temp is perfect and you are exaggerating. Engines are efficient when hot, when they are cold they are designed to burn more fuel to reach operating temperature faster and perform the best. So what could you do is connect an OBD and see if temp is between expected around 100 Celsius or 210 Fahrenheit. Also fans have different speeds when the engine its too hot it will run faster and be pretty loud, but when its just over normal temp they wont go too fast just the necessary
Yes but you will need to bring it to a professional for Freon. They don't sell that in stores. Also, if your refrigerant is low then there is a reason. It would need to have a leak.
2006 Chevy Silverado Cooling fans run continuously changed the cooling fans,fan relays, changed the temperature control switch but the fan still stay s running
guys please use simple linguistics. what's wrong in calling the coolant coolant or simply water. it took me hours to find out that anti freez is the water inside the radiator. anyways thanks it really helpful
I'm sorry but I call thinking by their names. There is no water in my radiators. There is only antifreeze. Antifreeze CONTAINS some water but it is not water. Antifreeze = coolant
i had the same problem before on my 1998 corolla, i replaced the coolant temp sensor switch and the cooling fan relay but the fan still runs as soon as the ignition switch is turn on. upon checking i found out that its a wire problem, the wires from the sensor to the relay were fried.
Hey there, we have a 250 hp tactor that does this and I think after watching ur video that it is the temp sensor. You said that a manual fan with a clutch is ran of the belt, but isnt an electric that aswell?
@@Rythecarguy Our fan is told when to speed up and down via electricity instead of the old way with fluids, that we also own tractors that are using. That is what I refer to when I say an electric fan, but maybe a belt driven fan is similar controlled to an electric driven fan, so the problem may be the same as in your video, I just think that the sensor is placed in front of the fan instead and that works because the fan in build to run constantly then speed up when the water is getting hot. When the water gets hot the air coming through the radiator in front of the fan will change in temps and the fan will adjust speed. Not sure tho.
Hey I have a 2012 Nissan maxima and My car. Fan always stay on while the car is on every time I turn on the car They come on and never shut off in till I turn off the car then shut off what seems to be the problem if you please do know let me know
no, the thermostat opens and closes when the fluid heats up controlling the temperature. The sensor controls the fans turning on and off also controlling the internal temp of the motor.
I changed my radiator fan on my 96 bmw 318ti and it works but now my car turns on and then Boggs down and turns off. But it worked fine before. Has anybody ever had the same problem? I stumped!
