Great video! This actually clears up a lot of things I needed to know while repairing my own ac. Thanks a bunch!

This is exactly what I wanted to learn tonight (2017). Great explanations and thankful this was here.

Thank you so much for creating this video, I was curious how my car's A/C system works. This video provides a clean and easy to follow overview of an A/C system and will be helpful to me as I try to solve my car's A/C problem. Thanks again for the well made video and explanation!!

Wow great explanation. Although this was specific for a car AC system, this explanation is also perfect for any basic AC system. Great Job.

Love the video, helps me to understand more the function of the A/C, keep it up!!!!

Ive never completely understood anyone except for this guy. Guy you explain this stuff perfect. I really appreciate it i know a bunch but ive learned everything else from these videos. Keep it up!! Ill for sure send people to your videos my guy. 💯 the BEST!!!

I had to give you a thumbs up you did a good job explaining the AC system. Good Luck!

Best basic description of AC system operation I've seen.

Very nice explanation! I know the very basics of auto mechanics, nothing to advanced. So recently my condensor broke and I had no idea what that was! Your video helped explain what I am paying the mechanic to fix! Keep making more videos!

Thank you for a very informative video.

Good explanation on the differences between orifice style and variable expansion style. Just what I needed thanks.

Well put together and easy to understand, thank you!

thank you so much for dropping this knowledge ,I will watch more of your videos now

Great job explaining the basic AC system

Good job on tutorial. One clarification to note: A system that uses a clutch-cycling orifice tube as a metering device vs TXV thermal expansion valve as drawn above; utilizes an accumulator/drier that is located on the low-side between the evaporator and compressor. It is used to catch excess refrigerant liquid and lubricant oil that leaves the evaporator. It will allow some oil to enter vapor stream to help lubricate the compressor. TXV metering device system has a receiver/drier located on HIGH SIDE between condenser and evaporator. CCOC orifice tube system has an accumulator/drier located on LOW SIDE (w/ LS cycling switch) between evaporator and compressor.

Xtremely informative thank you

awesome vid man very thorough, thanks!

Appreciate you taking the time to make this video.

Maybe you should try a laser pointer to point engine parts out. That way you don't have to stick your hands in a tight area and the viewer can tell exactly where you're pointing. Thanks for the video.

Great explanation bro, really informative. You sound like a really good and honest Tech.

God Bless the People with the Gift of Explanation 🙏🏿

Well done buddy nice video, love it thank you for taking the time to make it.

Thank you very much. Easy explanation and very helpful.

Great information man, very well put together, easy to understand, thank you for sharing.

Great. this is a public service without bureaucracy. thank you

Great vid man, thank you!

I like the way you presented this video, good job.

Thanks for the video. I had a 1989 Honda Accord and the system had a sight glass on one of the components and I could see the refrigerant flow in one direction. I don't recall a vehicle I've had since then that had a sight glass. Thanks again.

Very well explained. Thank you so much.

Extremely well done. You're an excellent instructor.

Many Thanks, good explanation.

that a great description now i understand how it works thanks for that

Awesome video man, thanks! Helped me quite a bit.

Wow, thanks for making this. Very good. I learned a lot!

Very well explained how the whole thing works

I enjoyed your video. It was very helpful. Thank you!

Ok this is my second video I watched from you and let me just say.....God bless you and yours.. Thanks for this! BTW, your good at explaining, good comprehension. It just so happens that my AC is out, blows hot air and I have put freezer stuff but it only lasted a shot time so I'm thinking there is leak but I really dont know much about cars. I will follow the link to your video in which you explain how to check for leaks. Thanks again mate! [On the internet I'm British!]

Very good video keep them coming

thank you, it was helpful, easy to understand

Great video! There's is not so good explained videos in spanish. So you helped me to learn how an A/C works, thanks man!

Awesome video man keep up the good work I learned a lot from this!!!

This guy knows his stuff 👍

thank you so much for educational this video, bro!

Excellent video and information. Thank you

South Main Auto brought me here, you guys (along with other) are great. You got a new subscriber

thank you so much for sharing.. great work, keep it up!!

Good job from Bangladesh ❤❤.

thanks for the video very helpful!

Super job, well done thank you.

Calm man, You good explains and kind comments, I worry Scotty Kilmer talk too fast short explanation.

Thank you an awesome video I had a problem understanding before but this video sought it out please upload more on air braking system

Thank you for your video. You made it all make sense

Like your video and your flow chart was spot-on.

Nice job with the explanation...

Thanks for all the info. I took my 2000 Subaru Outback to a mechanic and he wants $2000 to find the blockage in my system. I bought a set of gauges and a temperature gun to try and find the blockage. But I screwed up from the get go. The gauges didn't come with any directions, (ebay) so I didn't close off the yellow hose when I connected the red and blue lines to the high and low ports. So when I opened up the high and low gauges after turning on my engine and running the a/c on high, I could feel pressure coming out of the yellow line. I believe I evacuated what Freon I had in the system. My gauges are reading 0 on the red side and 10psi on the blue, and my compressor clutch will not engage. The clutch was engaging before when I added Freon to the system, and the mechanic never mentioned it not working. So I think it was me who screwed up by not blocking off the yellow hose on my gauge set. Do I need to evacuate the system before adding new Freon to it ? I figure once I get Freon back in the system I will be better equipped to diagnose where the blockage may be. Any tips for locating a blockage ? Scotty Kilmer's video mentioned using the temperature gun. If I need to replace the condenser, should I replace the drier as well ? Thanks for any help and God bless you for helping out your fellow man. John

This video helped me out a lot. I understood the general concept of an air conditioning but I wasn't sure how to locate many of these parts.

Super Helpful! Thanks!!!

2 thumbs up! I love your videos. I've learned a lot and thanks for making these videos!

Great video Facundo!

Great job. Thank you sir.

Like your video man and your accent as well, two thumbs up for ya

Hi, great explanatory video! Here's my situation, 2003 Pathfinder, AC hasn't been maintained since new! I did the DIY Can w/gauge thing. But before adding r34 the gauge read 105-110psi way into the red w/car running ! ( I was told do not add at that point, seek professional help) **Story of my life! Anyway, watching a few DIY Utubes, I quickly figured out that I can put gauge on The LOW Pressure tube under the Dust Cap and bleed the pressure down! I did just that, but unlike the utubes, it never put a yellow residue into my white rags all the way down to Zero PSI ! ok, seems easy enough ( I know there is more involved), but shooting for simple fix, I shook up can of r34 and proceeded to fill as directions and several U-tubers directed) I put in all 18oz of the can and the gauge sat perfectly in middle of green area, I reached in window to feel nice fairly cold air coming out of vent!!!! I said PTL and was very happy it seemed to have worked perfectly :-)) ... each day car was blowing warmer and warmer air :-( ... after a week, I was told it was because I didn't fill it enough! ?! I went to Auto Part Store I bought 2 small 12oz cans of r34, I repeated steps above..... Yes, The gauge started way up in the red again pervious adding the 2 cans, I bled it off, put the 2 cans in, the gauge went to the top of the green area on the gauge, I used another gauge from a friend & had same reading! so I know it's probably not a faulty gauge! YAY, I have cooler air blowing into car from vents... but not cold , sure enough 3 days later the AC was a little cooler than outside air My neighbor, doing me a favor works at Sears Automotive, took it in today to see if his Mechanic could trouble shoot it and see if and where there maybe a leak or if any of the components are bad! * Here's the funny thing, instead of me replacing the dust cap on the L line, I kept the cheap-o gauge on it all week and kept raising the hood to see what it read whether it sat all night or ??? After blowing warm and it zooming back up to the red, I bled it down to zero, and watched the gauge climb on it's own! I opened the hood this AM in front of him to grab my gauge and it was in the white area, I showed him. Upon servicing the AC The Mechanic texted that the Compressor was fine and I was lucky not to have blown a seal, for I had overfilled R34 !!! I say B.S. but then I don't understand this as A Trained AC Mechanic should! 1) How could I overcharge it having bled psi down to zero both times previous adding R34 ? 2) Upon being asked if they put dye in to check for leaks, they told me later that they had put the dye in ... (I'm not meaning to be a turd, and reiterate I am No Mechanic but skeptical because from what I understand it's a enclosed system like Brake Fluid system or Coolant on a vehicle! There has to be a leak somewhere, 15 Years and AC blew cold enough to put a sweater on, it worked fine and now it doesn't! Any ideas , Please help this old Veteran out God Bless America

Enjoyed watching this one as well, Thanks.

Thankyou very much for your video. I learned a lot :)

Very educational video. Thank you so much.

very educative thank you.regards

Thanks! Big help.

Excellent video !

very nice and informative.

Keep up good work .

That is very cool! Thank you.

nice and informative sir.

Solid video dude!

hey this is a great video thanks . you should make a video on reading a/c gauges also to approach a diagnose on the a/c system.

Excellent thank you!!! 😁

Great video, South Main Auto sent me over with a high recommendation on your videos and I can say I was not disappointed. Thanks again for a great video!

Good. Clear understand. Thank you.

Good. clearly understood.Thank you

Great job buddy 👍👍👍👍

gracias buen video

Excellent stuff

He needs to be an instructor at some school

Great Video

Simple, now I gotta go locate these in my car.

This video is awesome thanks a lot!

Fantastic video!!!!!!!!!! You’re amazing! Love the visuals! I’m having issues with my Tesla model 3 Air conditioner and I’m trying to explain to people on my channel and learn myself how the A/C system works… this video is perfect! Do you have any videos that talk about the Evaporator drain from the A/C and problems that can arise from having debris in the system and bad/ or clogged evaporator waiter drain? Thanks! I will link this video on my own channel! Excellent work!

Thank you for a well explained overview of how the A/C system works. Very helpful!

Great Video. However, I think you should have shown two diagrams. One diagrams showing the expansion valve/receiver dryer setup and the other showing the orifice tube/ a/c accumulator setup.

Amazing...gratful

Thank you!!

good video as always and very good tutorial and explanation and very good timing for ac info before spring and summer on question thou what is the pressure on low side and on high side is there big different in those line. thanks for sharing and posting.

Very nice

i appreciate you

Changed the a/c compressor (filled oil up to correct levels), desiccant bag (04 Hyundai Santa Fe, receiver drier attached on the side of condenser), expansion valve, and all the o-rings pertaining to each component changed. Put a vacuum on it for ~45 mins, let it sit for another 45 mins with no indicated leaks, charged the system up utilizing the manifold gauges to "correct pressures", unhooked gauges, got in the car and the air was warm.... Plugged gauges back in, and it shows low pressure side almost pegged, and high pressure side hovering under 150psi (it was almost 90 degrees here). When recovering refrigerant, the high pressure side drains faster than the low, and will always be lower readings than the low side. Every once in a while, the air will feel "cool", but nowhere near what it should be. Condenser fan is working great, radiator fans working, compressor clutch is engaged, and a/c switch works. My guess would be the expansion valve, but I wanted to get a second opinion from you. I've watched and learned from your videos over the years, and they are the most informative. Please help! Thanks!

Thanks a lot

Very good video man ! Well detailed ! I have one question so i everytime my car is on and i put the recharge guage on it and turn the ac on it goes down to 0psi but then i turn it off and presssure goes back up but still no cold air i changed the compressor ,expansion and the only thing i have to replace is the drier and maybe condesor any clue on what you think this issue might be ?

Great video! I was wondering should I replace the receiver dryer when I replace the AC compressor in my 99 Toyota 4Runner? if so any advice on how to replace the dryer?

Thanks man, great video :) I have a question, I got an issue with the condenser. Is it OK to take it off till I get a new one? I'll make sure all AC lines are closed and maybe take out the AC relay.

I really appreciate this video which helped me to know abut car AC. it is good to know abut car AC system . can you put more videos regarding HVAC faceplate and HMI. how car heating system works, how engine cooling system works with the help of coolant pump. Thanks

wonder ful