A/C Clutch Does Not Engage-Diagnostic Fundamentals (full charge)

The procedures shown in this video can be applied to any A/C system that has a full system charge but the A/C clutch is not engaging. (2008 Mazda 3)
Interested in any tools that I am using? See links below:
ScannerDanner Tools:
www.scannerdanner.com/tools.html
www.amazon.com/shop/scannerda...
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

[@robs905]

Just subscribed. FINALLY found something worth paying for premium! Great, thoughtful "This is what you HAVE to do to coreectly diagnose problems, as opposed to throwing popular parts at the "problem".

[@ScannerDanner]

Really appreciate this comment my friend. Looking forward to your comments and questions on the classes! And watching you progress in this field because of it!

[@mikeward2922]

Caleb is a lucky young man. I think I learned 55 things from this video aside from a faulty clutch. Really good stuff. One of the best I've seen on this platform, no kidding.

[@ScannerDanner]

Thanks so much!

[@friedlogic]

My favorite video on youtube is about a old piano being restored piece by piece by hand. Honestly; this comes in a close 2nd. Well done. Almost came in 1st place. Bravo.

[@ScannerDanner]

That's awesome, I'm really glad you liked it. I've gotten the opposite reactions on this video too lol. From the silver bullet seekers (the ones who just want the fix and don't care to learn)

[@andrej2321]

A true master, much like a prophet, not just of and in his own craft, or his own element, but more importantly in that which is yet to be revealed and discovered. He should have been a rapper, but he was sent as scanner danner. 🤘🏼 stay rad as a radiator.

[@mobileautorepairbypacheco1806]

The only thing I can tell you is thank you for not being selfish and teaching what you know to those who follow you. Believe me, people who help someone do well in life.

[@a7xalterbridgerock]

This dude should be more than a car mechanic. Not saying there's anything wrong with being a car mechanic,.. but clearly he can apply himself in a much larger capacity! Great video, and great information.

[@ScannerDanner]

Thank you Alex!

[@sarahdeshay1394]

No, it’s great to have someone capable of proper diagnosis and not just someone who reads a code or changes parts until the problem goes away. Many of todays “mechanics” guess until the problem goes away, costing the customer much unnecessary expense.

[@juanaguilar6440]

I like the excitement around 34:50 when he explains how a bad ground makes the housing an extension of a voltage drop. SD is the Man!

[@ryanfarhat9278]

If you’re not a member you’re missing out… If you’re a technician, this is a must. Don’t be a parts changer… we’ve all heard that, but that’s the Motto here and the standard…. The best part is the explanation behind every diagnosis and it’s simplified plus VERY DETAILED ON THE PREMIUM CHANNEL. some times over the top which is the BEST. I’ve worked at shops that just change parts, with no reason and sometimes got it right but couldn’t explain why . I HATE THAT!! I love confidence and knowledge. This is the place, I’m never leaving thank you DANNER!!

[@ScannerDanner]

Thank you Ryan!

[@Asian_Connection]

Hi, Can someone help me? So I vacuum down the AC system and left it connect for a day and it seem to have lost 8psi (-22psi). I think it's a very slow leak since when I tested the system before Vaccum and it had a little pressure in it. So my question is if I inject the dye and then vacuum the system to load the Freon will it remove the dye from the system? Thx

[@Asian_Connection]

Your is so lucky to have someone so knowledgable!

[@richieursomarso495]

The smell doesnt upload

[@allancanty9579]

Best decision I made 4 years ago

[@josephs9268]

This video just reaffirmed what I thought about one of my own cars. I love these videos so much I just watch for the fun and knowledge I gain. Been a mobile mechanic since 2008 but you learn something new everyday. Thanks for the opportunity to watch such informative videos with vast knowledge.

[@asimkhan8620]

Thank you ScannerDanner! You're a fantastic teacher! They need to have passionate and patient teachers like you in the school system.

[@salimazzi5232]

This morning 13/08/2019. I was doing my air conditioning and F.GAS training at the Birmingham city collage UK, it's pleasure watching you and I thank you from the bottom of my heart I learned a lot-off from you pleas don't stop making this videos

[@reginaldpierre7319]

I knew nothing about fixing cars, just 6 months watching you , I can fix a good party of my car issue, I do understand everything perfectly even if I'm not too good in English. But my obsession is troubleshooting wiring, as one of the best car electrician. Reading wiring diagrams, fixing any issue wiring so replace the box fuses and redoing the wiring. Thank you Scanner Danner.

[@roadkill5333]

A special thanks, to cameraman Caleb, for putting up with a parent, when goofing off and friends are the things of choice!! Lol We feel for ya, brother!!

[@jasonc.4683]

Awesome video professor. That key word "VARIABLE" is what haunts me in my head everytime I am about to make a call. That key word is what's transforming me as very well competent tech. That key word, once u are aware of the variables of the systems u are working with will prevent little to no comebacks. Thanx professor for all u taught us. Take care.😎

[@roadkill5333]

Very nice example!! Even Caleb is picking up the material!! This is so difficult to understand, and how it all works!! When I was a teen, a A/C tech neighbor had retired, but was still doing service calls, and used me as a helper. He tried to teach a young teen, some basic info, and he couldn't break thru!! I just couldn't understand it, and wouldn't listen! I went a different way! The hardest part for me, was understanding the idea that refrigerant boiled at -40 degrees!! I knew that water boils at 212 deg, so how could refrigerant be hot enough to cook pasta at -40, and how did that make me feel cold!! My weak brain couldn't get he idea! It just held me back for so long! It wasn't until I learned the basic principles of science, how it all worked! For me, it was the realization of what "BOILS" means!! Basic science! Boils means CHANGE FROM A LIQUID STATE TO A VAPOR STATE!! It doesn't mean that it will make pasta for us!! And when it changes,(BOILS) it absorbs heat!! So, the point that refrigerant boils, it absorbs the surrounding heat, and makes things around it feel cool (or scientifically, the absence of heat)! The rest I could fit together, and it all made sense to me!! The A/C system is just a controlled compression and then release of a material that helps absorb the excess heat, to make us feel good!! Great job, Scan!! And Caleb too! Thanks for sharing!! AND TEACHING!! AND ENTERTAINING!!

[@teravolt6113]

Yeah, and when the refrigerant level gets so low you hear the expansion device hiss behind the dash almost like a gas stove would, you don't get cold air anymore because liquid->vapor transition isn't happening anymore.

[@janetleeharrison]

You explained everything so thoroughly that a 55 yr. old woman like myself can follow along with how you diagnosed & pinpointed the problem. I have a/c issues & have been educating myself *before* taking my truck to the garage. At first I thought I just needed a recharge, but sadly it's looking more like a clutch/compressor. Oh well, at least now I won't be surprised. THANKS - Jax., FL.

[@SuperEllis3]

Same thing here in jax chasing my tale!

[@jeremyah78]

Just love when I can use a refresher in some car system, and I can just watch a ScannerDanner video to get right back up to speed! Brilliant!

[@ScannerDanner]

Thank you Jeremy!

[@1977jelliott]

I remember doing hundreds AC system fitments and hundreds of R12 to R134a retrofits on brand new vehicles from Hyundai in the 90s when I started my apprenticeship, it was gravy work, my workmates and I figured out quicker ways of doing the job because of repetition, we also learned the basics operation of AC systems and all the components. Made big money from "time saved" bonuses and also got a head start on diagnosing because we knew what normal system operation should look like through repetition. Top work on the safety aspects in the video, Paul.

[@MiguelRodriguez-pz8wi]

Thank you for this video. My wife cousin have a mazda 3 with the AC that just not working. I can help her now. Here in the south AC is a must. Thanks again.

[@Elconbrioso]

6 minutes in - Damn, he done drunk the Freon. Serious now - this is excellent , real time , tuition on the principle of refrigeration. It's about 9 pm on a Saturday night here in the UK , the AC on my Ford does not work and I'm on U tube to escape the enthralling (not) Saturday night TV. I've watched about the first ten minutes of this production and will come back for the remainder tomorrow.

[@adriannyasia]

What a treasure trove of information, Scanner Danner is... Caleb is very fortunate to have a Dad like that... 🤷🏼‍♂️✊🏽

[@ScannerDanner]

And I'm very fortunate to have my son working for me 😃 watch some of my new videos and see how good he has gotten at editing. Game changer type stuff imo Thank you!

[@themechanic6117]

I like how you find different ways to explain the same thing. people learn in different ways .great video

[@kellyspeppers]

Like that you are teaching the basics about how refrigerant works. Most people leave that out. Very good that you get great questions from your son, he adds a lot to your videos. A lot of the same questions the viewers will have.

[@jerryrogers5233]

Great job and explanation. The pressure/temperature relationship was good as pv/t = pv/t (Charles and Boyles law works) and I especially liked the use of the relay tester as well as continuity checks. Your vocation is not in auto mechanics but rather should be in teaching practical sciences or a vocational technical school, but the pay is poor. I use the emergency brake in addition to chocks and leave the wedding band off while working. You enlightened me and I appreciate the effort.

[@jesseonly1327]

Although I'm no longer a technician, I still enjoy watching your videos. I still learn and I will continue to learn and your channel helps. Thanks for doing what your doing.

[@8953147]

Thank you Caleb for assisting your dad!! I understand the properties of R134 much better now; thanks Paul for explaining, as well as the case ground check- never thought of it that way!!!

[@WiseInetellect]

Thanks ScannerDanner! I appreciate your style of teaching. Explaining the PSI/ temperature relationship in different ways really helped me understand it better.

[@Paul1958R]

Paul, Great diagnosis, explanation, and video. Thank you to you and Caleb! God bless Paul (in MA)

[@tobyrogers2234]

Best thing I have invested in is the ScannerDanner field guide and premium channel ! My knowledge of electrical design and circuit testing is better than ever before . I no longer have to guess if a sensor is bad or something else that would require changing parts that’s not needed . Thanks Paul for taking time to teach.

[@iwens1966]

FINALLY, a video where I didn't get dumber from watching. Good stuff, sir.

[@maniacslap1623]

Old video I know. Hope all is going well with Caleb. Very informative. I definitely had a front wheel drive roll right off the jack stand so the bit about the e-brake was gold lol

[@intestinalworm1202]

Great job guys - thorough, not hit-and-miss, one of the best videos on ac! So many killed underneath vehicles - always use chocks when jacking vehicle.

[@metalmonster34]

God bless you guys. I've done so many jobs on my car with succession and it'll be the first time I tackle AC problems. Cheers!

[@videosenutube]

For people like myself,not only do we get an excellent presentation of the complex ins and outs of how the AC systems functions .we keep increasing our knowledge of the English language your pronunciation of every word it's so clean.thank you..and your team God bless.

[@YourFajah]

Hands down the "BEST" instruction video I have ever seen. Easily understood. Fantastic job. I will look forward to more. Great job Bro.

[@ScannerDanner]

Thank you!

[@markmohr210]

I been a member for long time now and i love it. The content is great and super handy i been a mechanic for 25 years and i am always learning still and he has definitely made me faster at diagnosing lots of situations that ya i would have figured out but made it faster by doing his way ..thanks again SD for all the great content .cheers Markus

[@ScannerDanner]

Thank you Markus!

[@Pablo_Automotive]

Thank you Paul & Caleb for another great video, I like you to mention safety, in my work it is the first rule and the few times I have had to call attention to a co-worker or apprentice to have been for not respecting the rules of security. Big hug from Spain.

[@onenessmagi143]

You are so what I need in my life. I have asked for a teacher that could explain things where I could understand what is going on. I just got my compressor changed in my car. And as soon as I did my water pump started to go bad. Then my car would not start, so I had to get a new battery. Then the battery light would not go off and I was told I need a new alternator. It has been a domino effect with the issues in my car and the mechanic I have can not explain anything except that the part is bad. I don't mind paying money as long as I can learn something in the process. I know that everything I attract is a lesson for me to learn. Now I have attracted you, a teacher that can help me understand these attractions so I can better my situations in life. I love the way you explain using visuals and in multiple scenarios . Your teaching skill is that of a master. I plan to join the Scannerdanner Premium classes so I can get more of your teachings. I can see you wholeheartedly love what you do and I appreciate you for that.

[@paulliucci8380]

Every Mechanic should watch this guy

[@ericwolf1971]

Exceptional video! By the Way You are a great dad! This is the same thing I do with my kids when I'm working on their cars so they learn as we go. I also encourage them to pass on their knowledge to their kids. it is priceless. TY

[@mynameismud1776]

I'm glad I found this video. The first AC I worked on was badly wired to a toggle switch. Burned a lot of connectors and wires through the harness. Somehow even burned out the cooling fan relay and connectors. I traced any issue the ac system could have mechanically, then started on electric. Those harness are very hard to work through, they attach to everything. The greatest part of this job is its for work and the parts changer there won't admit wiring a compressor directly to stay on is a big mistake. Anyway I'm going on day 6 of rebuilding the ac and cooling fan systems. For the first ac I've seen everything on, this is an awesome learning experience as well as a huge challenge. Videos like this are lifesavers. And you make me look like I learned ac systems overnight. Thank you for this 2015 sierra 1500. And no, it's not the condenser lol 15:05

[@brokenempath]

Trying to troubleshoot my AC and this is the best video I’ve come across! You’re a natural teacher and are going to help so many people with your content. Thank you! 🙂

[@ScannerDanner]

Thank you!

[@wyattoneable]

Most excellent! I appreciate the lessons large and small. Especially the diagram and ground testing of the housing and the explanation of the circuit.

[@spelunkerd]

Ha ha, I was thinking exactly the same thing, it is an elegant and completely safe test for a bad engine ground. To put external power to the housing to test the final pathway to ground is always more spooky.

[@anthonysova7117]

Your analogy with the water bottle was spot on. CALLED SATURATED PRESSURE LIQUID AND VAPOR

[@ScannerDanner]

thank you! So many people do not understand what "rest pressure" actually is telling you and what it is not

[@tonyl8242]

You're awesome! Nice demo and explanation! It is so nice and generous of you to share so much of your precious experience with us. Thank you!

[@lmtsmt847]

Man I just found you on here top shelf for a guy trying to get the ase test passed I'm gonna subscribe thank you

[@wandy4468]

I used to have the same problem with suzuki escudo running through a flood. Just had a broken fuse. Clean the ac pulley and replaced the fuse was all I did. Guess I got lucky. Thanks for the lesson Paul n Caleb. 😍

[@Glenn08CRF]

Love the vids Danner as I am an electronics/electrical tech and also power engineer. Love troubleshooting. I've had relays click also thinking one was good only to find it was still bad! Load side contact was screwed! New relay and my trouble was clear! Love the safety on jacking up the car. Too many people killed by not thinking! Cheers from Ontario, Canada!

[@christianbateman4530]

Scanner Danner premium changed my life and the way I diagnose... Highly recommend this to anyone that has a passion for the trade and would like to better your knowledge.

[@ScannerDanner]

Thank you Ruaan!

[@rusty6666]

Nice work danner love the content man its nice to get all the info when trying to find the problem always good to follow the steps to pin point the problem as well Thanks your a great teacher....

[@Jason-cu1jp]

Haven't quite finished watching the video yet, but I wanted to thank you for demystifying AC functionality for me. 👍

[@normaforsyth7950]

What I could have been with a father like that. Great teaching as well - hands on, verbal, and visual.

[@adishajrovic2082]

It is very kind of you sharing your knowledge in the way you do since from my experience not a lot of people will do that. Thank you so much.

[@raysolis6553]

First time here, going to see all your videos if they are like this. No joke, your teaching is spot on for me to understand clearly. thank you

[@ScannerDanner]

They are all this way. Thank you! I've been teaching at a technical college for 20 years 😉 Happy to have you here on my channel!

[@user-ll5oj4eo1g]

I appreciate this is meant also to teach the camera person. I haven't been able to find much in the way of fundamentals to understand working on the AC at home so thank you!

[@FixxeR186]

I appreciate the well explained, articulate, helpful beyond words lessons, tips and proceedures you had for your kiddo. :) the fact that we all have this video accessible too is just a major bonus. and a brilliant example of being a dad. subscribing now.

[@ScannerDanner]

Thanks my friend

[@norvelcurtis3542]

Thank you for having your son work the camera. The last video I watched, the guy wore the camera on his head and moved around so much I was dizzy by the end. I forgot most of what he said before I could stand up and work on my car. 😁

[@manuelrueda2937]

Gracias Paul eres un gran maestro yo tengo tu libro y estoy suscrito me as ayudado mucho es pero q sigas muchos años más muchas gracias y saludos

[@statecapture6086]

Funny how I comment before watching the video 🤣 much appreciated ScannerDanner. This is Neo from South Africa.

[@paulfiebke3909]

Love watching you, and I've learned so much from you. Keep up the good work and may God bless you and your family

[@Waldee84]

I'm a SD premium member and I don't like this kind of advertising but to show my appreciation and support for work that Paul is doing I'm gonna make an exception. I've been watching his welfare channel and didn't get a thing what he was teaching. And now slowly I'm getting how the system works and can do my own diagnosis and repairs way better than so called pseudo parts changing mechanics.

[@ScannerDanner]

Hahaha "welfare channel" thanks my friend

[@tool7769]

Great video Paul on the basics..Think sometimes we can over think it and make the job harder and nice job on pointing out how to safely jack a car up..I also end up using wheel chucks when working from the ground here in the rust belt of Ohio..Just never know what shape the parking brakes are in even if they work.

[@JohnDoe-su2og]

The way you explain things is awesome. You remind me of my dad when he was teaching me about cars. Caleb is one lucky kid!! I will definitely be subscribing and watching more of your videos. Thanks for the knowledge and keep up the good work man you are great.👌

[@ScannerDanner]

Thank you and welcome!

[@tr4u5mp90]

Your son should be very proud of you brotha. I can relate with what you are doing and why. I do the same with my son. New subscriber here.

[@robertmartz9812]

You really help connect the dots Paul for us who understand theory and concepts and relate in laymen terms . Thank you for your sharing of knowledge and am purchasing the book and SD Premium very soon.

[@ScannerDanner]

Look forward to hearing more from you, thank you!

[@sivakunchala]

What a great explanation. I love it. Learned from this video how to diagnose 'clutch does not engage' issue. Thank you very much.

[@ehabshady7984]

Fantastic wonderful classes in premium channel. All electric fundimental you need to diagnose step by step.

[@mkatalin09]

CH2FCF3 (r134a gas) has boiling point of −26.3 °C (−15.34 °F) at atmosferic pressure(1bar/100Kpa) This is a great video buddy,keep up the good work and i appreciate you sharing the knowledge

[@ScannerDanner]

Thanks for the info and the comment!

[@8gomerpyle22]

4 = 4 Fl atoms, 3 = # of Hydrogen atoms plus 1, 1 = # of Carbon atoms minus 1. Hence 134a = 2 carbons, 2 Hydrogen atoms and 4 Fl atoms.

[@RJ-lk5pj]

Can’t always rely on the scanner- But you have to rely on the Danner! Great information- insight and troubleshooting ideas-

[@selvamg635]

Excellent of your sequence of explaining with appropriate video with detailing

[@angryfishing7958]

Best on Utube. Thank you sir! Thank you for teaching your son. My son is 16 and we are working on his AC in his 2002 Silverado 4x4. Thank you.

[@dawiehechter5159]

Thanks Paul another great video on AC, this is great info and enjoy the summer. Dawie from South Africa

[@spkay31]

I'm an electrical engineer by education and I am very impressed with your videos. You have excellent troubleshooting skills and always come back to basic circuit analysis which is the key to locating the source of electrical problems with certainty.

[@ScannerDanner]

Thank you very much! Mean a lot coming from someone like you

[@lindafoxwood78]

Wonderful video on the AC. I have Civic 2009 - the AC went out yesterday for no reason. I bought a AC gauge 4 hose and will looking at the car when the gauge gets here in a few days. Thanks for your lesson.

[@jimmiller9641]

I said it before and I’ll say it again. Thank you for taking the time to push safety with jack stands and using the e brake to hold the car. Also keeping legs/feet out from under the rotor. I see it way to many times.

[@brentowen9480]

And.. I was a Scanner Danner premium subscriber for a year...I've got the book, I use it often. Danner has a great electrical diagnosis routine..he has it figured out. I'm with him as far as using an staying away from an ohm meter.Voltage and amperage checks are key. Just wish i could have him give me a class on the days I get stumped.

[@shelvesetc7150]

Muy instructivo y tecnico como siempre, aprendo mucho y tambien su energia, nos transmite a todos y me dan ganas de haser ejercisios me levanta el espiritu😀👍

[@RedeemedMechanic]

Great video. As far as the no comm with the HVAC module, note that at 15:17 the scan tool briefly tells you “Auto A/C only” in the top left corner. I’ve learned to watch for that with my Snapon. When you see that they are telling you the manual one has no separate module.

[@bethuelparrilla1721]

Thank you Sir I learned something how to trouble shot AC , more power God Bless you and your Son!!!

[@gestapospies2626]

Hi Lenny. You too Paul n Kaleb!. You’re the best. Loved the empty cup analogy. GREAT STUFF. You da bomb SannerDanner

[@paulfiebke3909]

Means the world to me and you learn so much on it, it's well worth the money

[@davida871]

One of the best videos on ac troubleshooting & circuit testing. Thank you

[@ScannerDanner]

Thank you! It's funny, I hear the exact opposite on this video too. And I'm always like, okay, what if you don't have power to the clutch? Then what? That's when this video is super valuable and many don't see that. Thank you again!

[@davida871]

@ScannerDanner that's exactly why I was watching it through the end. My ac worked fine last fall. Over the winter it lost all 134a so I used sniffer, blacklight. But no pressure in system. Replaced condenser added 1oz pag46 to it. Replaced discharge line (known issue on Optima)vacuumed -28hg held overnight. Charged with 12oz 134a but clutch won't cycle. Thinking after video that it's the expansion valve. Bought Denso one. Yet to install. I need to confirm ac relay works as per video yet and chk power from compressor like you did. Ac pressure switch could cause this too?Thank you. Watched your classroom instruction too. Good stuff. Great teacher. Son is lucky.

[@ScannerDanner]

@@davida871 psi switches and also a temp sensor in the evap core on this one that can lock out the clutch from operating. I have some more AC videos too. There is a playlist got HVAC stuff here. Thanks again

[@davida871]

@ScannerDanner yes watching the video with your sons 300zx. Lucky break with condenser oring. I use canned air to blow soap water from high & low side. Cheap fix so moisture doesn't absorb into system.

[@ScannerDanner]

@@davida871 wait until you see the follow up. We proved the vacuum decay test cannot be 100% trusted

[@dmorley100]

@3:37 me personally, I started taking that pressure/temperature relationship thing with R134a with a grain of salt after I had a Chevy Silverado once that had 100 psi reading on the gauges with the engine off, and it was around 100 degrees when I took the pressure reading. I decided to hook up the machine and recover the system anyway. It wound up being a good thing I did because despite having all that pressure, it only recovered 0.1 lbs of Freon/refrigerant. Could’ve wasted SO much time if I hadn’t done that first. Kudos on bringing that up.

[@shieldcracker]

@Morley what SD says is correct as long as the refrigerant is in a saturated condition (liquid & gas present). In your case it's very likely that you had only gas in the system and possibly some air too.

[@lucianlucian9911]

I love your thermodynamics explanation at the beginning of the video, their were pretty good actually! Another thing, about that AC input you were taking about, it is quite common in some European cars that I have seen (I suppose Asian too), that the clutch to be commanded by taking into account at least two inputs: the AC button "on" and at the same time fan speed selector "on". It does not work without the fan speed input.

[@fernandoknapp7743]

Your videos are great, Paul! Many thanks from Brazil!

[@nicknicu1787]

Great AC clutch diagnosis and explanation! 👍

[@samohtsolacad229]

Man, I learned vehicle AC operation so much from watching many of your AC repair videos. Finally subbed. 👍

[@ScannerDanner]

Awesome, thank you!

[@arthurfricchione8119]

Good video Paul and Caleb. Go cool off guys. 👍👍👍

[@RC-Heli835]

I put the e brake on once to change a U joint on an F 150. When the drive shaft came down that truck started moving. I flew out from under it a hundred mph on a creeper. I was lucky the air hose was on the right side of the creeper and didnt stop me. The truck rolled all the way out the shop and into a lake. That e brake was a disk brake at the back of the transfer case that required a drive shaft to be in place to work.

[@DependableAutoTruck]

the chanell has opened up a whole new world for me. i am 64 years old have always went with gut not anymore now i can diag and prove findings. it is so nice to be able to diag a problem and not hope i have it correct. the feeling of knowing i am not guessing is wonderful and i have only had the premium for about a month if you are on the fence get on the correct side it will be the best money you have ever spent. thanks for telling me scanner danner that you would help me wish i had knows a long time ago the value.

[@ScannerDanner]

Thanks so much!

[@mike-yp1uk]

Scanner Danner premium is without a doubt a life changing career advancement. I got my L1 as a result of the premium side of this channel. I invest thousands of dollars in my tool and education is my best tools. I'm still a member because it keeps my edge Sharp.

[@ScannerDanner]

Thank you so much for your continued support. I can't thank guys like you enough

[@justinpalmour9283]

Awesome walk through. I've done ohm check to confirm open on a clutch coil

[@skee0310]

Well we’ll fourth the money!! The content he provides for the price hands down unbeatable value. You never stop learning and you never stop training.

[@DeadEric78]

I'm not a premium member, currently. However, I did do the KZbin premium just before the switch. I watched the class lectures, countless case studies and gained the understanding of how car electrical systems work. Since then, I quickly passed my lead tech in skill and productivity. Engine Performance and Electrical ASE tests were a breeze. I've been moved to the busiest shop in my company. My new lead tech is very impressed with my skills and will ask for my input. Lastly, I've triple my pay in 3 years. Paul, I'm 41 years old, was laid off 4 years ago, my kids are grown, so I decided to do what I like doing, fix cars. I started as an oil and tire changer for minimum wage. Today, I'm a Senior Tech and well paid. You have given me the knowledge to make me successful. I thank you from the bottom of my heart. When I finish paying off my Matco jacket (came with a free tool box) I'll be back on premium.

[@ScannerDanner]

It is these kind of stories that mean more to me than any monetary gains. Thank you!

[@jdcasa4826]

Thank you for the info on changing the gap on the compressor. A well done from me and in a way I could understand how to fix it. I'll be back. Thanks again

[@bellybell542]

I so much love your diagnostic videos. God bless your Bro.

[@robertrichardson1133]

I have no doubt that the premium channel is well worth the price, you will see me there as soon as I finish my shop. Thanks for the great video, and wear whatever color shirt you are comfortable wearing, we all know it's too hot to be wearing dark colors.

[@zab-srt-powerglide4954]

Hey man !! Iove ur analysis of AC diagnosis. U the best. Thank u

[@Nabeelco]

ScannerDanner Premium is an awesome way to learn troubleshooting fundamentals! Totally worth it!

[@kingbolen_official]

agree

[@Zib187]

Excellent info! I loved the pressure readings explanation with regard to air temps. The $11 that I pay for SD Premium is well worth it. This past Saturday I saved a good $250+ by not replacing the fan switch (heater control module) on my daughter's 2012 Ford Escape that I bought for her on Friday. The previous owner told me that the 2 lower speeds didn't work & that his mechanic told him that the switch needed to be replaced. I put what I learned from SD Premium to good use & found that the switch worked just fine & it needed a $18 blower motor resistor. Now I just need to diagnose the lift-gate ajar light that won't go out. 👍

[@ScannerDanner]

There would be a switch for that one too my friend