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".

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.

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.

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

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

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!!

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!

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.

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.

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.😎

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.

You will start seeing some merch listed under all of my KZfaq videos in the next few days. In the mean time here is the link to my store teespring.com/stores/scannerdanner-2 I will be donating 100% of the proceeds from ALL of my merch sales to organizations that help people! Not all of them will be faith based but a majority of them will be I am sure. I don't have the list complete yet but you will see it on my website when I do. I will also keep the number of sales public so you all can hold me accountable. Thank you all so much!

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.

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

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.

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.

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!!

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!!

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.

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.

I will NEVER wear a light gray shirt again when it is 95 degrees. I am so sorry. I have held onto this video for a year because of this lol.

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

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.

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.

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. 👍

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

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.

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!!!

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

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

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.

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

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

finally a man with sense , work under a sun shade

@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.

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

Nice electrical testing! When I heard "flood car" I thought of the Katrina cars. Make sure to wear protective personal equipment when working around flood cars! Don't gets cuts! If so seek immediate medical attention! Think SEPSIS! Nice Job Paul!

I highly recommend not to drink refrigerant anymore🤣🤣

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. 😍

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.

I love when they do a proper tutorial just like they're teaching I appreciate that as many of us do !

you learn what he teaches at technical college at a fraction of the cost its well worth the 11 dallars a month

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.

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!

Paul the top light is to tell you which post on the top is the power side of the load circuit. You take the switch and go to LED and if it's green or Red it tells you which top post is the power side of the load side which you accomplished with the test light which was the red terminal. Tells which post is 30 or 87 and If you'd have toggled the switch to LED it would have been glowing red. The LED will shine only when power & ground is present and the switch is in the LED position. Lets you do voltage drop testing & know what top terminal is 30 or 87 with just the flip of the switch. I printed the manual from the CD & have the manual shrunk down to fit in the box for when I have/had questions b/c I used to think the same about the load side light but it only lights in the LED position if there is voltage and a ground. Hope this helped Paul.

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

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.

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

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! 🙂

I'm not a premium member, currently. However, I did do the KZfaq 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.

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

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. 😁

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

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

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!

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

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

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

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.

Yet another useful video by Paul, and SDP is way worth the 11 bucks or so, the training he gives you is unparalleled. he shows the complete process, even his missteps. he explains everything as he goes, and when he gets off topic its actually always helpful, I figure he saved me hundreds, if mot thousands of dollars by his teaching through SDP and Utube. I even repaired my Home HVAC because of his teaching on thermistor operation. Ive been wrenching for 35 years and Paul gives the best Diagnostic training I have ever seen, get SDP!

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.

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.👌

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.

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.

I love this guy. Not only does he give detailed step by step guided help on how to diagnose and repair the issue....but he explains how it works, and why its broken now in terms even a woman can understand. I love diagnosing and fixing my car myself when i can physically but im the type where i need to know how it works before i go taking it apart to fix it. Love this guy

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

You are a true mechanic, very knowledgeable. I just change parts until I fix the problem 😂 I need to learn how to do diagnostic. The best part I liked most about the video is that you were teaching your son as you were teaching us. Tell your son he is lucky to have a dad that takes the time to teach him, and you are lucky to have a son that wants to learn. A subscriber now, keep at it! 🤙🏽🤙🏽🤙🏽

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

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.

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

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.

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!

Hi. Great talk. One error I noticed about testing the case of the compressor for power and not ground. Remember, the case is physically connected to ground all the time. You'll not read power there ever. The last evidence of power would be on power side of the "open" circuit somewhere between your wire test through the insulated electro magnetic coil, to where the end of the coil is supposed to be connected. Great explanation all the same. Thanks. Now I need to check my power to the coil itself and go from there.

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

Excellent AC lesson. Refresher in my case. Really, thanks. That relay tool is great. I want one.

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.

my dodge durango 2004 AC stopped working and when the fans kick on i hear a loud tapping in the panel passenger side back by the 3rd row. When i bought the car i heard the rear AC didnt work but the front did. When i got it nothing worked. Also when i pull the cap off the low pressure valve it almost spits out tiny bits of liquid. You're a really good teacher btw. Your son is a lucky young man.

Thanks for the help I have a Mazda and the ac just quit with you're help and guidelines I can try and troubleshoot what's wrong with my ac I don't have all the tools for the job but maybe I can borrow some and see if I can just fix it I also probably over charged it thinking it was empty with one of those DIY AutoZone kits with the can attached to it the guy told me it took 12 pounds or so was wrong I put 2cans only takes 1,1pnds of the 134 a type but this helps me get closer to what the problem could be so big thanks scanner Danner today you the man 👍😉

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

thanks again always i learn from you my age 62 bu mechanic line job whatever you call it i lovett i am a mechanic since 1977 up to now i do all kind car transmissions engines A/c work but sure in difficulties between old car & new technology of course you are A master thousands benefit from your fruitful lecture i learned A lot you are one of the best of my followers again i say thanks a lot lasting health and wellness i relay, appreciate for you sincere efforts to benefit others

People from Pittsburgh do not play. Great video - great critical thinking.

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.

It's a great video and thank you for all of your effort. I think what you failed to observe are the low and high pressure switches on the refrigerant lines which may not be on all cars. What I saw on another video is that the switches are not on the power side. They are on the ground side which allow the clutch to engage. And what I learned was that the high and low switches are actually opposite in there value. One is in the closed position with pressure, and the other in open position with pressure. They are the controlling factor to the clutch working by allowing ground to connect. It's all very complicated but I learned allot between that video and yours. Thank you very much boys!!!

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.

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.

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.

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

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.

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....

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.

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

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.

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

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

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

Scanner dinner could actually change your life as a did to me .. Thank you Paul thank you for everything.. And Special hi to Caleb

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!

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.

I have several subscriptions but SD Premium is the best value without a doubt.

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