How-to Test for AC Compressor Clutch Function

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Power Probe used in video → amzn.to/3PBHVFX
Test for AC Compressor Clutch Function. Knowing when your AC compressor is running or not is critical to diagnosing the AC system, but also for charging the system. Reading the low side pressure must be done when the compressor is running. In this video, you'll learn to do both.
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DO YOUR HOMEWORK before making a decision based on information you find on RU-vid here, or anywhere else when it comes to your car or your safety. Failure to follow this counsel could result in a Darwin Award. While this video is educational, it's up to you to fully understand the topics discussed here or seek advice from professionals familiar with your situation.
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Опубликовано:

25 июл 2017

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Комментарии : 309

@briansmobile1 7 лет назад

Power Probe used in video → amzn.to/2h1QaPN

@rsattahip 5 лет назад

You knew they were selling something useless.

@robmendoza6210 5 лет назад

@@rsattahip$@*£ -Many tools might seem useless at first glance,especially if You don't know how to use them.

@rsattahip 5 лет назад

@@robmendoza6210 It's a glorified wire with a switch on it being sold for $61. Anyone who cannot figure that out should not be messing with cars. The 12 volt meter is pointless, you can do that with a light bulb.

@robmendoza6210 5 лет назад

@@rsattahip I just thought of a huge career move for you Robin,why don't you creat a product that can test continuity,add power or ground by pressing a button!but sell it for less than the "Ridiculous"power probe.

@alexvillalobos7137 4 года назад

Hey my car that was having trouble was also a 2007 two door Honda Civic with the same paint color 😂. Maybe they have a recall

@junangeles Год назад

I like how you demonstrated this by comparing the test on a broken compressor vs a brand new compressor. Showed how it should work (new) and how a broken one does not work. That power probe really does the easy job for testing the fault.

@FiddleLessonsOnline 4 года назад

You have excellent teaching skills... dovetail nicely with your knowledge as a mechanic! Great video!

@KenJohnico 6 лет назад

My case is a wore out clutch, but there are big difference in prices, 35 clutch and 155 compressor. Thanks for the class.

@cris1977 4 года назад

Great video. Clearly shows the parts under the hood and explains well how to troubleshoot

@wyattoneable 7 лет назад

Your ability to explain things while keeping the visual aids on point makes coming here very enjoyable. Plus the only way i can ski is though your view finder. 😊

@briansmobile1 7 лет назад

Thanks brother!

@outside-atlast9113 4 года назад

Great job and thanks for the info. I love to ski also and that looked like alot of fun. Nice scenery.

@aarong4144 6 лет назад

This video was very helpful. Very thorough. Good camera angles. Thank you.

@briansmobile1 5 лет назад

Welcome- thanks Aaron!

@CC-xs1hh 6 лет назад

clutch squeeling, but blowing cold, going to check the presure level and add some oil (?), man I envy the bonus video, that was nice, I'm down in central Tx, never skied, now it's to late, turning 60 in weeks and knees are about gone, thanks for all the good videos, KEEP HAVING FUN!

@PaulWingfield Год назад

Thanks for a great tip re the testing of the compressor. Videos like yours are what RU-vid is all about. 😊

@kingfreedom1863 4 года назад

One of the best made videos thank you

@nickmatula7622 7 лет назад

Powder bonus footage woot woot! I am ready for a good powder day, been to long since my last one, no friends on a powder day,lol

@vqdriver 7 лет назад

Dude. Your videos are so well done! Keep up the good work and the Blizzard of Aaaahs skiing was a great bonus too! Would like more of those haha. Cheers

@briansmobile1 7 лет назад

Thanks Rudy!

@tingtongraas 2 месяца назад

Wait, Glen Plake just showed me how to check for a dodgy compressor!!? That's too cool

@summalibertas4588 4 года назад

Never realized how fun skiing looks until now holy shit looks like a blast!

@heyitschinoable 6 лет назад

Brian more AC videos please!!!

@bradking9374 4 месяца назад

TY SIR, BEEN A WHILE SINCE IVE DONE THIS TY FOR REFRESHING MY OLD BRAIN!!

@Earthstein 2 месяца назад

Excellent presentation. Thank you.

@jubyloo2 3 года назад

Great stuff. Lost cooling so this is helpful.

@maxodorestant9053 4 года назад

Wonderfully made video.

@malcolminthemiddle8777 3 года назад

Thanks for the video. I spent over 800 bucks and now i got to fix the wire.

@philtrottier4442 6 лет назад

Excellent video!

@singlespeedman 7 лет назад

I am glad you got a PowerProbe. Your old methods were.........slower. Great video.

@TheLuar15 2 года назад

Thank you so much. It really helped me.

@burnhard74 7 лет назад

nice music on the bonus deal at the end! thanx man!

@528freq8 10 дней назад

Yes thanks for your great video

@qwedfwedf 7 лет назад

Muy buenos videos muy profecional compañero

@diegogonzalez9086 5 лет назад

Hooo! Nice song at the end

@oneeyedcrab 6 лет назад

great video, really helpful! And the same car! Wondering if AC is a problem in these cars, second time my wife has had trouble

@jdmfans6078 2 года назад

awesome well explained . thanks 👍

@stphelps12 2 года назад

Dope views on the mountain. Good content

@jessegil5101 6 лет назад

skiing is drifting. good video

@tinikiacareathers 2 года назад

Thank you so much sir for sharing!!

@Assassin-kq5nk 5 лет назад

Flames are awesome! 🔥

@5meanbean 6 лет назад

Liked your tape To the point no bull shit no story telling Good man Thanks Charlie Been Collision-rep Tech.

@briansmobile1 5 лет назад

Thanks Charlie!

@paulhoyland3594 6 лет назад

Excellent video my friend. Any chance of letting me know who the music at the end was? Need to get my hands on that. Thanks again.

@jackarteaga2808 4 года назад

Holy smokes @5:09, I was researching for the exact same car and reason😅😂😮that's literally the same car!

@D.Tarlev 6 лет назад

thank you!!!

@BoostedBuckets 7 лет назад

Last summer my mustangs ac stoped working so I just used speaker wire with a nail taped to it to put 12volts to the compressor clutch, pretty hacked but it worked ( ended up being a bad constant control relay module so I had to pay like $100 for a new one instead of just buying a relay)

@georgeperez4770 7 лет назад

Not to mention that new compressors come oil up already. I had the same problem with my first car the fan clutch went out and the shop I took it to told me. It's a lot easier to replace the whole compressor than have something else go bad later down the road. So I did even though it cost almost about 1k. But we'll worth it.

@teravolt6113 6 лет назад

Not necessarily a new compressor is the way to go. I've had the Harrison CVC compressor in my car stop working about 6 years ago, after 8 years with the car down the road. The clutch coil died because the original coils come with a thermal fuse that just like in home appliances opens up without a reason from time to time (heat cycling or vibrations perhaps) since the coil didn't have any oxidation or burn marks at all and the fuse didn't look like it melted or burned up (i asked to have the failed coil given to me so that i could examine it). Paid about 400 bucks to have it serviced (the compressor had to come off due to cramped space preventing clutch assembly access from the front), and not the 1000 bucks for a brand new compressor. A year later it ceased working again and this time the servicing was on warranty. That last coil has been working for 5 years, don't know whether it comes with a thermal fuse or not, the thermal fuse probably is on the coil to allow the compressor to immediately disengage as soon as it starts locking up and making the clutch slip, but preventing compressor lockup is simply a matter of having your AC properly serviced once every 3 years so that gas and compressor lubricant oil levels are regularly checked and, if necessary, restored to proper levels, and fixing any leaks. But, for these compressors, a new clutch pulley assembly, including the coil, is about 150 american bucks or less, and a new clutch coil is even cheaper.

@nurovahmad 5 лет назад

Nice bonus video. 👍

@briansmobile1 5 лет назад

Thanks!

@AlexGZ9 6 лет назад

Thanks for sharing your knowledge...I have a 2001 Chevy Silverado 1500...a/c not working on idle blows hot air and when driving is nice and cold. I have remplace the fan clutch and the a/c low pressure switch. Any ideas on what else could be causing the problem.? Thanks for your help.

@tractormantp2113 3 года назад

Good video

@mikachicha5205 3 года назад

U Rock Dude Thanks a Ton

@peacefrog0521 6 лет назад

Hey Brian - Great video. My '97 Mazda MX5 (ok, Miata) had, in addition to the AC relay and the high & low side switches, a thermal protection switch (a thermocouple maybe?) that would cut power to the clutch if the switch sensed overheating. Basically, the power feed would go into this switch, and then a line from the switch to the clutch. Often, these switches would fail prematurely, even if the compressor & clutch were still working. Some Miata guys would simply bypass the switch to get the compressor working. Do you (or does anyone) know if the Honda compressor also has such a thermal protection switch? Thx

@tammytrew7256 2 года назад

Someone had mentioned this to me last year when my AC stopped working on our record day here in WA when it reached 108° theorizing it might be that it overheated the "switch" that you are referring to! Makes me wonder!

@atticusfinch4687 4 года назад

My clutch comes on for a bit then stops. (2011 For Ranger)Or doesn't come on at all. When it comes on it blows real cold. I unplugged the wires, tapped on it and when I cranked up the truck, then it came on. Shows a lot of oxidized dust. I'm pretty sure you helped me confirm the problem. Thanks.. Nice ski footage!

@donald1056 7 лет назад

Beautiful scenery

@briansmobile1 7 лет назад

Thanks- Sundance and Whisper Ridge are my "happy places" Snowbird too, but it's too expensive.

@larryd382 6 лет назад

When you were skiing the music to the video i really like. Can you send a link to more of it so i can be motivated to do house chores. No seriousely i liked it like maveric somewhat. Hey and thanks for the help. Gotta run always trying to get away with it. He. He. He. Lol....

@qunicetoole7497 6 лет назад

hey Brian.... you the man! excellent video, precise and straight to the point AC compressor check without taking 40 minutes to an hour to explain, question though, did you vacuum pump the system, did you have to change the orifice tube and the accumulator before you install the new compressor, I'm just curious.... cuz I've got a 03 Honda Element I need to replace the compressor on it won't engage as well, I love that tester unit you used to engage the clutch, sweet! I've got to get me one of those, like I said; excellent diy video content bro! that doesn't take all day to explain, cuz time is a precious commodity! anyhow...thanks for the response in advance.

@jamiehalifax4954 5 лет назад

Good question dude . And I notice he never answered it..... .

@buddygallagher1193 Год назад

Thanks for the video man I learned something

@briansmobile1 Год назад

Welcome Buddy!

@johnb1121 3 года назад

Can you make more electrical videos please best video so far

@D6Spanky 7 лет назад

awesome sauce!

@D6Spanky 7 лет назад

I really gotta get me one of those. It's at the top of my "tools I seriously need" list. 😄

@life-zh2gp 4 года назад

Very good

@moneymac2864 7 лет назад

Beautiful

@user-ii6lq1hx4q 3 года назад

Thanks for the video. Will clutch engage when ac off?

@KuyaPow626 21 день назад

As others have said you have a great teaching method and clear video examples! This is what I'm on RU-vid for!!! And the funny comment at the end while skiing "you know you did a good job if it feels like this inside your car" lol. What kind of song was that at the end? Is that just what they call metal or would you call that genre of. guitar something else? It reminds me of the Van Halen ending for the credits of Twister "Respect the Wind" or something like that... Love it

@Bear049 6 лет назад

Brother Brian can a compressor be broken yet turn enough to still cool a bit. My son told me his compressor froze then began to spin but the a.c. is not very cold. It's a 2004 Suzuki XL7

@matthewbaxter7502 3 года назад

Hi Brian how do you test a clutchless sanden compressor like what's on my 2009 a3? Great vidio cheers Matt. 👍

@beaverman011 4 года назад

Great video Brian. Are you saying that your Powerprobe can send voltage to the clutch by just touching the insulated clutch wire? How does this work? Very Cool.

@chvydrptop 4 года назад

Thanks for the the through explanation. So you happen to know what it means when the clutch is constanly spinning with the outside belt coaster bearing? Similar to when you are supply 12volts. Is that a sign of a bad bearing or bad clutch?

@tylerhughes5420 2 года назад

Usually means a pressure sensor is bad

@noneya2112 4 года назад

thanks for the video it is helpful. I have a unique issue. I have replaced the condenser, L/P switch due to damage. Replaced all relays, just because they are cheap enough. Evacuated, vacuumed the system and recharged using a RobinAire service cart. Turn on the car with A/C system on full, the clutch engages, cooling fans turn on. The system cools the car 5-8 seconds. Cooling fans stop and clutch disengages. This happens every time I start the car. I am at my witts end, if you could offer any advice I would greatly appreciate it. Thanks in advance.

@guesswhomartin9249 2 года назад

Thank you.. very useful information.. What's that meter looking handheld devise called ? I'd like to get one.

@slayer666790 6 лет назад

Also, it only gets cold when it's night time , or at high Rpms.

@dancesmanify 6 лет назад

Nice vid...I just start having problems with mine the compressor looks fine still running and when i turn on the AC ( Cold ) it wont work..the heater works fine I check if needs Coolant or Freon and as fast i look the freon gauge the black line went for green to red. Any recommendations??

@bernardmacarius2635 6 лет назад

Do you replace the condenser also so if metal were thrown into it, it does not end up in new unit?

@kennynvake4hve584 5 лет назад

I remove the a/c relay and took it apart..carefully, and pushed the contact's the same way it would do IF IT was working..and the clutch came on...I have no clue after this...All fuse's are good. The only thing I dont know is if the high side switch has to make...or not make to turn the magnetic clutch on..

@homeroaguilar6163 Год назад

Hello Brian how are you? I know sometimes I do some dumb question but why when my ac clutch kicks on my 95 riviera rpms goes a little be high like 850 to 1100 ?thanks for the advice and thanks for the good job in this videos

@Carlostype 5 лет назад

hi Brian, can I test the AC clutch operation from it's relay base as I when I jump 87 and 30 I do hear the clutch engage (better access for me) if this is ok to do? My issue is my AC was properly regassed but the AC (clutch) doesn't engage any more but it does engage when I jump the relay base 87-30. Fans don't turn on either when selecting AC on. The coolant temp sensor is lying, it's reading 40c when outside it's 18 and then goes up to 90c Thanks Brian, hope you've time to answer

@PotatoeChipz 5 лет назад

This gave me an idea of how to test the clutch after I pulled the compressor until I ran into the problem of what to probe with a 3-prong setup. 2 black wires and one yellow wire. 93 camry. Nada.

@PotatoeChipz 5 лет назад

NEVERMIND! Grounded to the body of the compressor and touched + to hot. 333k part and it still works. Time to PAG fill this bone dry beatch and retrofit for some cold air this desert summer. Thanks for the stimulation Brian.

@moehus1777 3 года назад

Great video, which are you applying power to ,i hv 2005 Acura RL, replaced and tested relays all passed accept clutch test, how to do that

@rodrigocamargo8400 18 дней назад

I liked the music at the end! Did you play that? Thanks !

@JP-oh8fe 5 лет назад

On the probe has a positive and negative and also a ground clamp. Do I ground the clamp somewhere before I push power to the ac compressor?

@maxnguyen22 3 года назад

What kind of compressor did you use? Links? And could you do a video on removing the refrigerant from the AC system

@joshmiller7870 Год назад

Brian to replace the high and low pressure switches/limits, do you need to reclaim the refrigerant or are there check valves under them? I have been told there are and also there are not from other techs. I am working on a1995 ford bronco with factory the aircon.

@frankcrawford416 5 лет назад

If I have 25 lbs in the low pressure fitting barely hovering in the low side of the green/ white line on my gauge would that be low enough to cause my AC to run hot to warm. The temp feels slight lower than ambiat air temp so I know the compressor is turning. I have a 2006 Dodge caravan. Thanks.

@BRENDAJASON1 6 лет назад

Got a 05 Altima I changed a fuse and the compressor started working then the clutch stop engaging, current getting to it and it’s full on feyon

@vincentmorissette2678 Год назад

Hi, thanks for the video. Could you tell me where you putt your testor on your old compressor because i have the same civic and all the Compressor’s wire are protected. Thanks for your time

@bdrichardson403 7 лет назад

The horns make you look like the Knights of Nee :-)

@solidale21 3 года назад

I was just told to diagnose my SILs A/C. Turned the car on and AC on full and the clutch didn't budge. Swapped similar working relays with the clutch relay and nothing. I'm thinking she needs a new AC clutch.

@xxvodanhxx 5 лет назад

At 3:30 I have no idea where the middle wire is due to the view and I haven't taken one out yet. So far when I turn on the AC I don't see the center of the clutch moving on a 95 T100. When I turn on the AC I don't see it moving the clutch in.

@NT-gz6bj 29 дней назад

You dont need any of that to test the ac clutch. Thanks to RY the Car Guy for this info, look him up on youtube for visual on how to do the self test. For Nissan Xterra (and according to comments on his video, nissan pathfinders too, maybe other vehicles- worth a try lol) Put your wippers up. Put the key in and turn to on position, don't start the vehicle. With in 20 secs of turning the key to the on position press the little button on the drivers side door frame (the one that tells your vehicle the door is open/closed). Turn the key to off then back to on and you should hear a quick horn beep. Thats good and means the self test will run. Will test in this order rear defogger Wippers (this is why you should put them up. So not to run on dry windshield) Lights, parking/side, license plate frame, head low and high. Ac clutch (you will hear the clicks if its working) Electric fan. It runs through the tests 3 times. Or you can end the test by turning the key off. If you dont hear the clicks after the headlight test and before the fan turns on then your ac clutch isn't working. Check fuses/relays and if fine then need to replace the ac clutch.

@crystrezerex2life 5 лет назад

Did you strip the wire going to the compressor in order to probe it?

@huskerflyguy79 Год назад

My 2013 Nissan Rogue Clutch works but the Bearing in the Pulley of the Clutch System is making a loud noise. I can reach the clutch by taking off the front passenger tire. Then take off the plastic wheel. Then you have full access to the a/c compressor clutch.

@WendelltheSongwriter 6 лет назад

I checked all electrical, replaced pressure switch on evap., and while checking my relay, I inadvertently installed it backwards, which engaged the clutch, but made a grinding noise. I quickly removed it and put it in properly, but still won't engage. I replaced the relay, still nothing. Is clutch bad, then? Thank you. Enough refrigerant, etc.

@rsvp9816 3 года назад

do you disconnect the battery when doing the test on the compressor? also can you just use jumper cables from the battery to the compressor post? whats the best way to not short anything out on the car?

@patrickthompson1454 7 месяцев назад

I have a 1998 Mercedes ML320 and the AC stopped working. First thing I checked was the fuse and it was burned out. Easy fix right? Well the AC still doesn’t work. I just took the old power steering pump off to replace and now I have a lot of room to work with. The serpentine belt that runs everything is off. I was wondering can I check to see if power is working across the AC pump with everything off? If so do you have any suggestions on the best way to do it? Thank you very much and I definitely appreciate your great video.

@julianveluz 6 лет назад

Is there a problem if your a/c is on and the clutch doesn't stop spinning?

@mediocreman2 5 дней назад

Crazy how short modern compressors last. This car was only 10 years old at the time. I've had cars never need a compressor after 30+ years and many of them German.

@phillipsumner3281 6 лет назад

I have a Nissan altima the AC works when it wants to clutch and compressor are good could it be a wire fuse or relay?

@markarinque 3 года назад

Hi Sir brian, good thing I've found your content. Can I have a question? My compressor is not functioning when turning the AC knob. When I tested the compressor, supplied power straight from the battery, it just keep ticking just like in your video, thus I think my compressor is still working. Could it be the wiring? My AC relay is fine, i trued using the relay fuse on other circuit such as fog lamps and it worked. Hope yo notice my comment thanks

@stuzeviews 3 года назад

I wondered about this., Just a lead from the battery positive to the correct pin and hey presto a clicking sound. However, I imagine that the system has to have sufficient Freon in it or it will not work.This is designed to prevent the Compressor burning out. My Compressor is not working and there is zero Freon in the system so........ Centre pin I think he said but not easy to check with a Multimeter as the power pin will only energise via the Thermal protection switch. This is just my take on this and I have no A/C experience, please note!

@powerofknowledge7771 3 года назад

How do you know if you need to replace both the clutch and compressor or just one? In my situation, the clutch is less than half the price of the compressor.

@dannysa503 5 лет назад

So the clutch shouldn't engage unless I turn the a/c, on right?? Cause mine is on and off whenever the engine is running. Thanks for the video.

@briansmobile1 5 лет назад

If your defrost is on and your car is newer, it will turn on the AC for you and turn off recirculating air for best defrosting results.

@badhabitz93 6 лет назад

What can you say about a brand-new ac compressor failing to engage after alternater gets fried and replaced.

@dziaraldaskazakevicius6130 4 года назад

Hi Brian, I have 2015 VW Jetta TDI. My a/c compressor clutch spins always. Fan on spins, a/c on spins but no cold air. What can be wrong. Thanks

@jamiehalifax4954 5 лет назад

Hi shouldnt the condenser coil be replaced also if the ac motor is shot ? .

@Eli-kr5bm 3 года назад

How many watts or amps does the electromagnet in the clutch pulls? Ive been thinking about it, its a lot of electrical pull while ac and lights are on in a vehicle.

@MichaelGsandup 6 лет назад

Hi I have a 2005 Cadillac STS 4.6 northstar v8 I just serviced my AC unit was alittle low on Freon so i topped it off within the safe psi of what it calls for my question is how do I reset ac service message on the dash? Any help would be greatly appreciate thanks

@robbii-sanmarryshow7251 4 года назад

Does the compressor need to be charged in order for the clutch to engage.? Unless you override with a power prob

@atkgrl 2 года назад

Brian, Where is the clutch what does it do? What is the line you keep touching and how do I get it? How do I know if the compressor needs to be replaced at all or if its the relay or some fuse? Where do I troubleshoot, in other words what are the first starting steps to know if I even have to get to the compressor or relay or arm whatever piece you were not pointing out. Okay power probe sales but I could also just use a piece of wire to the 12vt batter right?

@ralpharomeo7420 6 лет назад

Hello there. I have the coupe version to this car. My car makes a weird whining noise. Not squeak. Not grind. A whine. Sounds like power steering but was told its not. Its ac compressor. My ac works fine. Car buzzes/whines when ac compressor is off. When i turn ac on, noise goes away! Used to stay away, but only stays away when clutch engages. Ac compressor shuts off and car starts to whine again? Any idea what it could be? Bearing? Pulley? Belt? Car is noisy until ac compressor is turned on. So i turn it on everytime im driving to get rid of whine. Goes in and out whether or driving or idle. Mechanic says its compressor but the compressor helps get rid of noise so i dont understand how that could be my issue? Any thoughts?