How To Test and Replace A Radiator Cooling Fan Switch

Автокөліктер мен көлік құралдары

This is a short video on how to locate, remove and test the radiator cooling fan switch on your vehicle. The cooling fan switch simply activates the cooling fans to turn on, typically around 195 degrees F. A faulty switch can cause the engine to overheat.
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Пікірлер: 89

  • @zdrz7727
    @zdrz77276 ай бұрын

    Nice demonstration, but I think it's important to note, as mentioned in some other comments: - Blowtorch test is NOT definite, as failing switch might close at the higher temperature and cause engine overheating. - Boiling water is much more precise, and adding a cheap food thermometer can test more accurately for the open and close temperatures, which are sometimes printed on the switch itself.

  • @amirvissyram6150
    @amirvissyram6150 Жыл бұрын

    Very concise and simple to understand explanation,thank you

  • @CarsNToys

    @CarsNToys

    Жыл бұрын

    Glad it was helpful!

  • @frankwestphal8532
    @frankwestphal85322 жыл бұрын

    Perfectly explained. Thanks!

  • @4theRun
    @4theRun2 жыл бұрын

    Great video, thanks a lot. Helped me fix my Honda Civic.

  • @samsudeen321
    @samsudeen321 Жыл бұрын

    You explain very patiently and in a clear manner. Please post more videos about Ford Fiesta.thank you very much.

  • @nanasakyi6262
    @nanasakyi62622 жыл бұрын

    Thanks for the video, I want to know if this this test is ok for 2014 Dodge Journey coolant temperature sensor

  • @dannytrinh07
    @dannytrinh07 Жыл бұрын

    I would like to chip in something so others could learn as well. I have tested the same way as demonstration and it beeps as it should since my switch is working. However, my switch made that connection at 214 degree (sometime 217) which is a lot later than specs allowance and that is where all the trouble come from. The temperature gauge starts climb over half mark. So pay attention there as well. That was what I call half a$$ working switch and it must be replaced as well if you don't want your car overheating.

  • @malanvythilingam1590
    @malanvythilingam1590Ай бұрын

    Perfect if you can show with temperature, Switching on temperature is important.

  • @user-uj1xg7hb2u
    @user-uj1xg7hb2u7 ай бұрын

    Fantastic video boss, Gain hands on experience

  • @josephb5677
    @josephb5677 Жыл бұрын

    Hi thanks for the help, I have a question about my situation. The switch I'm working with has no plug/harness, it was just directly wired in. These wires are cut so there are 4 loose wires, two from the switch and 2 from the vehicle. Does it matter which wire from the switch goes to which wire on the vehicle?

  • @robertogomez8100
    @robertogomez81003 жыл бұрын

    Thanks a lot for your video, like always very well explained.

  • @CarsNToys

    @CarsNToys

    3 жыл бұрын

    My pleasure!

  • @wazup3333

    @wazup3333

    Жыл бұрын

    @@CarsNToys I tried testing my switch, in boiling water temperature it did not give continuity. With torch flaming it for 6-7 seconds it opened up and gave continuity. I put thermometer on the end and it shows 200 degrees from torch. Is there a lot of heat loss after you stop torching? why will it give continuity with torch but not boiling water. Is the switch bad? specs: its a BMW double temp sensor switch with 3 prongs. 91c degrees low speed 104c high speed.

  • @yaakcon
    @yaakcon Жыл бұрын

    MAN!! I LOVE THE WAY YOU EXPLAIN IT. IT IS SO CLEAR AND SIMPLE. THANK YOU. I HAVE 2004 HONDA PILOT AND BOTH FANS ARE NOT WORKING NOW.

  • @kevinmetcalf6371
    @kevinmetcalf63713 жыл бұрын

    Great tip bro

  • @paulphillips2887
    @paulphillips2887 Жыл бұрын

    V Good explaination, I like the idea of the test.

  • @Eurospec73
    @Eurospec737 ай бұрын

    Excellent video, thanks for sharing. When you say, set your meter to the continuity setting, What symbol exactly on your dial do you switch it to?

  • @MariaGonzalez-ei1pv
    @MariaGonzalez-ei1pv2 жыл бұрын

    Why did you replace that switch ?what was the symtoms you had?

  • @arivuazhagan442
    @arivuazhagan4422 жыл бұрын

    Thanku sir very good explain

  • @billyluu5102
    @billyluu5102 Жыл бұрын

    It’s very awesome video. Thank you for uploading this video. I can go test my radiator coolant fan switch. To see it . Is it working properly?

  • @martinrocha3015
    @martinrocha3015 Жыл бұрын

    Great video

  • @practicolingo6621
    @practicolingo66213 жыл бұрын

    Great way to explaining. Awesome video. Congrats!

  • @rogerforest1729

    @rogerforest1729

    3 жыл бұрын

    a trick: you can watch movies at Flixzone. I've been using them for watching a lot of movies recently.

  • @angelcannon922

    @angelcannon922

    3 жыл бұрын

    @Roger Forest Definitely, have been using flixzone for since november myself :)

  • @prashanweragoda4175
    @prashanweragoda41753 жыл бұрын

    Very clear...

  • @splashyreacts
    @splashyreacts Жыл бұрын

    Thanks for this. What should I do if the fan still doesn't work with a brand new switch and fuse? It turns on when I fiddle with the switch but then it turns off again a few seconds later

  • @mdmoyajmdmoyaj1747
    @mdmoyajmdmoyaj17472 жыл бұрын

    Thanks

  • @SirRamone
    @SirRamone2 жыл бұрын

    F22 In a CB7 the switch is located on the top radiator hose to the block I believe

  • @simaofernandes7484
    @simaofernandes7484Ай бұрын

    Would a normal lighter work or does it have to be blowtorch? I can't use the boiling water because I live in a flat and by the time I get downstairs the water would cool down I think

  • @vajaynunthandass676
    @vajaynunthandass676 Жыл бұрын

    Very good. Makes me want to get back into the rat race again

  • @mohammad45h
    @mohammad45h Жыл бұрын

    Hello 👋...good like very tanks...🙏🙏🙏🙏👌👌👌

  • @keithmartens2918
    @keithmartens29183 жыл бұрын

    Hi just watching your video i have continuity without doing any heat or cool test is that good or is the sencer bad

  • @terencejay8845

    @terencejay8845

    2 жыл бұрын

    Probably stuck in the On position.

  • @Loulito
    @Loulito6 ай бұрын

    Hey CarsNToys, I have a question for you. Maybe you can shed some light on the subject. I had a faulty Fan switch for my 98' Camry and decided to order one from the dealership and it arrived today. I installed it and my car reached 199F and it did NOT switch the fans on. I let the car fully warm up and burped out any air bubbles and drove around and my car went up to 217F when the switch finally activated! But that's too high, the temp needle is a bit above the middle marker. Is it possible to have a bad switch from the dealership? Or should I look at something else?

  • @garyangelstad5212
    @garyangelstad521210 ай бұрын

    Sounds like a snap disc switch. Used in hvac systems decades ago for limit and fan controls

  • @Chinkychops12
    @Chinkychops12 Жыл бұрын

    Thank you but at what degrees should you have continuity.

  • @febynemenzo8579
    @febynemenzo85792 жыл бұрын

    Whats the size of your vise?

  • @emmanuelhabte4491
    @emmanuelhabte44912 жыл бұрын

    Bravo

  • @jeffcrookes2444
    @jeffcrookes24443 жыл бұрын

    Thanks for the very informative video. My temp switch is self grounding so only one terminal. How do I use the multi meter for that? Thank you in advance!

  • @astanisystems

    @astanisystems

    3 жыл бұрын

    I think that the radiator is it's ground which means that the body of the switch is the ground. In that case you should attach the negative(black) prong lead to the body of the switch and the red to the contact pin.

  • @cen7ury

    @cen7ury

    2 жыл бұрын

    With a single pin temp switch, the body of the switch grounds to the engine, so one lead goes to the terminal on the switch, and the other lead goes anywhere on the engine with a path to ground.

  • @adarkgothicforest8508
    @adarkgothicforest85083 жыл бұрын

    do all cars have a radiator fan switch on the radiator? i found the radiator fan switch on my 2001 honda crv by the thermostat in the engine bay. but in this video you're saying the dan switch is in the radiator itsself? or is that the temp sensor? or maybe you have a different car.

  • @Nonrecycling

    @Nonrecycling

    2 жыл бұрын

    There are 2 temperature sensors. 1 in radiator, manage fan on/off to keep coolant in temperature range. 2nd is on engine itself, it send you temperature readings on dashboard. Thermostat is just a valve that should be closed when engine is cool, so it can quickly get to optimal working temperature (cabin heater is using coolant too, so shorter loop helps getting heat too cabin faster) and opens up when engine gets hot so it have more volume of coolant available.

  • @pacsmacks7142
    @pacsmacks71422 жыл бұрын

    How long do these last cause I believe my issues was this but I’ve been at it for weeks so far it’s good after replacing but I’m fingers crossed

  • @jdmforever5583
    @jdmforever558310 ай бұрын

    You can also take a short piece of wire and touch both connections on the plug and if the fan comes on you know your switch is bad

  • @balsonnaoshekpam6240
    @balsonnaoshekpam62402 жыл бұрын

    Nice

  • @martinbrandt8789
    @martinbrandt87894 ай бұрын

    how do you test the temperature meter in the dashboard

  • @flaron352
    @flaron3523 жыл бұрын

    I installed new radiator, fan system with built in resistor and thermostat unit on 2012 fiat 500. Fan does not come on at all. Ran wire from battery to fan to check and it kicked on, pulled high and low relays and they clicked, fuses good. Temperature rises to halfway mark and still nothing. I shut down so does not over heat. Ran engine with cap off in case of air lock. Totally baffled

  • @terryraines9952
    @terryraines995210 ай бұрын

    thank you, took mine out and bench tested it with no heat and still got continuity, layed it on ice and still got continuity?? so I did replace it and fans working, have no clue why I was getting continuity

  • @jagpp2291
    @jagpp22912 жыл бұрын

    if the temperature gauge works can you say sensor is good?

  • @Seagrams

    @Seagrams

    2 жыл бұрын

    Nope, they are two different sensors. The temp sender is found on the engine block (I think), and the fan switch is found on the rad.

  • @jagpp2291

    @jagpp2291

    2 жыл бұрын

    @@Seagrams thx for reply for chevy caviler its different it works on cts and computer 💻

  • @helloisme4596
    @helloisme459611 ай бұрын

    I have a 2007 mustang,Ik it has a temp sensor but can’t find the switch

  • @geotechnologictv4177
    @geotechnologictv4177 Жыл бұрын

    3 pin test multimeter ?

  • @alexafa316
    @alexafa316 Жыл бұрын

    I bought a brand new switch and I'm blow torching it and I don't hear the switch making any noise or any numbers changing

  • @emmanuelhabte4491
    @emmanuelhabte44912 жыл бұрын

    I have new radiator fan is not working what is the reason please?

  • @Bigola
    @Bigola2 жыл бұрын

    Can you explain 195f, 205f what is the difference in the number

  • @mikes.8301

    @mikes.8301

    Жыл бұрын

    195° Fahrenheit, 205° Fahrenheit, these temperatures are what the thermostats and temperature switches are designed to open(tstat), or close(switches) depending on manufacturer

  • @cen7ury
    @cen7ury2 жыл бұрын

    Why would you do a jump cut between lighting the torch and when the meter indicates continuity, if it only takes a few seconds? All that does is make it more difficult for anyone trying to emulate the test method that you're demonstrating. I appreciate that you're trying to help people with this video. Otherwise generally good info.

  • @clows7633

    @clows7633

    Жыл бұрын

    right! i have a 2005 lexus 330es fan cooliong switch that i did this test but after heating it, it seem it does work. i dont know if it works or i just overheated it for like a whole minute and that somehow cause it to just click

  • @EHUE-kf4ey
    @EHUE-kf4ey Жыл бұрын

    SHORT & SIMPLE. QUESTION, THE AUX .FAN SWITCH ON AN 85 CORVETTE HAS A SINGLE WIRE. HOW DO I TEST IT? HELP.

  • @zdrz7727

    @zdrz7727

    6 ай бұрын

    The other connection is probably the metal casing of the switch, as the body of the car is usually connected to DC negative.

  • @TheHelado36
    @TheHelado36 Жыл бұрын

    Please what is the part number ?

  • @roimark358
    @roimark358 Жыл бұрын

    can we install a lower temp thérmo switch say around 75⁰C turning on temp?

  • @alexafa316

    @alexafa316

    Жыл бұрын

    Yes you can, the fans will just kick in a lot lol I just received my 80° C switch and I wanted to do this test but idk how I feel about torching it I feel like that's too much lol

  • @zdrz7727

    @zdrz7727

    6 ай бұрын

    Possible, but not good idea as it might not reach operating temperature, and run too cold, which is also not good for the engine.

  • @Medvediu1

    @Medvediu1

    5 ай бұрын

    @@zdrz7727it wont run cold cause we have the engines thermostat thats in the block responds for opening after reaching working temp

  • @brionadderley1643
    @brionadderley16433 жыл бұрын

    Bought one of these for my honda 98 accord didnt turn my fans on; apparently i wacthed a vid and some guy in the comment section said the fan swicth must be honda brand; not this generic one.

  • @Balake2094
    @Balake20948 ай бұрын

    Mine won't come off, it rotates on it's own Tried with a ratchet and a 24mm deep socket and nothing

  • @robertthegeek
    @robertthegeek Жыл бұрын

    What does the Radiator Cooling Fan Switch besides just maybe turn on the radiator fans

  • @johnmiller-in5bt

    @johnmiller-in5bt

    Жыл бұрын

    That's it! Just fan on and off

  • @johnmiller-in5bt

    @johnmiller-in5bt

    Жыл бұрын

    But you also have a relay doing the real switching.

  • @nigelweiss7449
    @nigelweiss74492 жыл бұрын

    Why do you have to remove the switch in order to do this? Couldn’t you just check for continuity with the engine running and see if you get it once the car is hot?

  • @Tonie473

    @Tonie473

    Жыл бұрын

    Probably because he already knew it was bad so he was going to change it anyways. Another option would have been to bridge the pins inside the connector and sew if the fan switches on before removing the sensor

  • @alexafa316

    @alexafa316

    Жыл бұрын

    Also I think the water pump has a big saw in this cuz it needs to be operational to shoot the coolant throughout the engine so the switch picks up the hot coolant to kick on the fans

  • @stryker819
    @stryker8193 жыл бұрын

    Is there one of these in my 1991 Murcury Capri?

  • @percillasamora5358

    @percillasamora5358

    Жыл бұрын

    Yes

  • @WavyVaporizers
    @WavyVaporizers2 жыл бұрын

    I changed the sensor switch on top of the thermostat and the 2 sensors below the distributor and my cooling fan doesnt come on when u turn on the ac and it's supposed to but never does. I checked my relays and fuses and they're fine. I thought maybe my fan needs to be replaced but I ran alligator clips from the cooling fan directly to the battery and the cooling fan came on with no problem. So my question is why isnt my cooling fan turning on when I turn on the ac???? The fan on the driver side comes on without any problems.

  • @percillasamora5358

    @percillasamora5358

    Жыл бұрын

    Put AC on high

  • @WavyVaporizers

    @WavyVaporizers

    Жыл бұрын

    @@percillasamora5358 the issue for me was my radiator was shot. It had like 7 holes in it so I replaced the radiator along with the fan and haven't had any issues at all since I changed my radiator

  • @yolandasirri2012
    @yolandasirri20122 жыл бұрын

    omg !! can someone help!!! I noticed the other day that my car was smelling hot started to run a lil hard so i noticed I wasn't hearing the fan kick on . last thing I want to do is blow the engine so I tested the fans and they work i replaced the thermo switch the thermostat the relay and fuse checked all wiring for burns and cuts didn't see anything I even flushed the radiator and refilled it. and my fan still wont kick on by its self. i have to keep my ac on to keep it cool . the car doesn't over heat well at least the instrument panel gauge reads normal but like i said I can smell when its getting hot. any ideas what I'm missing thanks in advance

  • @matthewheckman2981

    @matthewheckman2981

    2 жыл бұрын

    I'm in the exact same situation as you. Car started running a little hot but only at slow speeds. Checked the fuse, it was good. Swapped the relays and both work. Checked the wiring and nothing out of the ordinary. It's not a thermostat issue because that would effect you on the highway as well and my car runs fine if not idling or in stop and go traffic. I used a power probe on the fan motor and the fan motor works just fine. I also found out as well that if the AC is on near max then both fans will kick on and keep the car from overheating. I replaced the fan switch with an import direct from O'Reillys and it still wouldn't work. Took the car to the auto shop in town that I trust and they told me the fan switch that I replaced was faulty and didn't work. I replaced it under warranty with another one from O'Reillys and it didn't work. I took it out and used a blow torch on it and my multimeter told me I have continuity so I'm going to check the connector to the fan switch in the thermostat housing and then reinstall the one I have and see if it works by some miracle of the heat from the blowtorch made it work. Please let me know what you find out. My vehicle is a 1993 Honda Accord

  • @matthewheckman2981

    @matthewheckman2981

    2 жыл бұрын

    I ran a paper clip in the positive and negative part of the connector that plugs into the fan switch in the thermostat housing and my fans turned meaning that it has to be my fan switch (AGAIN!) so I will be returning this one and getting one from a junkyard. I will see what happens. It sounds like Hondas are really picky as far as fan switches go so try going for OEM or Denso if you check your fan switch again and find it's bad. Hope this helps, I will let you know what my results are tomorrow

  • @percillasamora5358

    @percillasamora5358

    Жыл бұрын

    U need me in your life swithart so u won't have 2 weary about stuff like that

  • @j30a1hernandez9
    @j30a1hernandez93 жыл бұрын

    what if it always has continuity when it is cold

  • @Xianpaul0523

    @Xianpaul0523

    3 жыл бұрын

    I have same problem.. Do you have an answer already?

  • @terencejay8845

    @terencejay8845

    2 жыл бұрын

    Means it's likely stuck in the On position. Your rad fan should be running constantly if that's the case.

  • @dorian8876
    @dorian88763 ай бұрын

    I have a brand new switch, but it turns on fan for a maybe 15 seconds and then goes off. I have bridged pins in plug and the fan is working properly. Should I try a new sensor ? Things like thermostat, water pump, auxiary water pump seems to work fine ... Don't see other option🤔

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