How a Car's HVAC System Works
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- čas přidán 22. 08. 2024
- Here's how an automotive heat, ventilation and air conditioning system works.
The HVAC system in a car is situated under the dashboard and controls the heat and cooling systems, as well as the defroster.
The AC system consists of the compressor, condenser, drier, evaporator core and expansion valve, the latter two of which are under the dash and are demonstrated in this video.
The heating system consists of the engine, water pump, and a heater core, which is under the dash.
The blower motor, usually situated behind the glove box will blow air from outside or recirculate air from inside the cabin. Air flows past the evaporator core where it is cooled, before heading to the HVAC mixer.
The mixer determines if the air is to be heated or left cold. It also directs air to your face, feet or the defroster. This is done by mechanical flaps inside the housing.
This video goes into details of the thermostatic expansion valve, evaporator core, recirculate actuator, blower motor, temperature sensor, blower resistor, flap actuators and the heater core.
Dashboard removal is necessary in order to access any of these components.
Am I the only person that noticed he mentioned you could CHANGE THE VIN NUMBER ?????? This guy is Brilliant !
Hi 😉
You're a wizard at maximum information in the least amount of time.
+Gene Fever thanks! short and to the point is how it should be.
@@speedkar99 wouldn't mind a more detail and longer version ;)
instablaster...
Es interesante si meabla e castellano grasias
He sure is.
Wow man BIG respect to you. You are perhaps the only one who is practically showing the real stuff and not just theories. Very well done brother.
Thanks. I try to be balanced and show practical and theoretical things.
Corolla 2010 model car compressor bearing Kaise change kare
You are very good teacher
Theories??
AC SYSTEM 101 took me a while to look for this info on Toyota... broken down details from beginning to end NICELY DONE Guy 👍👍👍💯
You just finished a whole chapter of first-year university mechanical engineering in less than 9 minutes. Legendary.
I still don't understand why the heck this channel has only 87k subscribers. There is simply no other channel that packs as much educational, intelligible information into such a concise and quick format. No wasted empty space while the narrator dickers around with the tools, camera shaking, pointless rambling and annoying ums and uhs between every other word. Exceptional work!
I agree... please share the knowledge
Not to mention how every other video starts with 3 minutes of "thanks for deciding to watch my video. Here is what im going to show you in this video. I will be discussing the following things SUBSCRIBE in this video SUBSCRIBE, in the following video I will be discussing the following SUBSCRIBE things that i already told you I will be SUBSCRIBE discussing. Okay are you ready to watch the video? Okay cool, but first I was sponsored by SUBSCRIBE audible. Okay now, for the video" and this guy just FUCKING DIVES IN
Maybe it's because he talks too fast. I have to watch his videos at 75% normal speed.
@ThePariss333 It isn't easy to understand, though, when he talks so fast. I need time to process what he is saying.
@@robertbrandywine On your keyboard, press "j" to go back 10 seconds, "k" to pause, "l" to go ahead 10 seconds.
lol. The toothbrush pointer is a nice touch.
+Isogen thanks
Isogen , the toothbrush is his brother's ;)
Yes it is. Someday I'll have to give it back. For now, he doesn't brush...
LOL
It is amazing how internet dicks can always find something to piss on....
the info at the end was the best! lol
+uguzg uzfgvuzjh Haha yea. Thanks
Thats why I just suscribed 👍 jagged
These videos are just the most brilliant explanations of stuff I have ever seen. Not only are you giving clear and simple explanations but you are dealing with topics that I have never seen covered before anywhere else, I assume because they're really difficult to explain simply without your method of taking it apart and cutting it to pieces. I just can't get enough!
I'm glad you find it helpful. Feel free to check out more of my videos like this.
I had many people trying to explain me how the AC system in a car work. Honestly you made me understand the entire system at once. You are a talented person bro! keep it up Subscribed!
Now that's the way it's done, get right to the point and guts of the operation without all the digression and nonsense. You covered more info in a few minutes, than most folks do in an hour... quick and informative.
Yep that's my style thanks!!
Back when I was a kid (many decades ago), my old man had a 57 Beatle with split oval rear screen that he was very proud of. The Beatle of course had an air cooled engine so no engine coolant to go through a heater block to heat the cabin. Instead some of the heated air from around the engine was captured and push through pipes on the floor of the car to each side and if you wanted heat, you would just manually open a couple of small vents that were built onto this pipework. Problem with that design was that if the exhaust gasket failed, you'd get exhaust fumes blowing into the cabin. I wonder how many people got seriously sick or died, driving Beatles around in winter. Great channel...Love your work. Keep it up.
That's an interesting HVAC design
Amazing video..I havent seen such a dissection in an AC system..
This guy has a doctorate degree in AC system..
Agreed
Best HVAC explanation I've seen yet. Great job. Thanks.
You are welcome. Check out my automatic HVAC video for more!
This took some time and energy to make. Thanks!
+peetre it sure did. Especially removing the dashboard
Video holds up. Explained so much in 8 minutes.
Thanks!!
This is the best video out of MANY I've watched to learn about the hvac components of my Tundra. I'm trying to find out where to put screens to prevent rodents from entering. Also how to clean it now that they've been inside. Thank you.
You are welcome. Glad you learned something!
This video literally gets better and better as you watch it from beginning to end. I can watch this over and over all day.
8:08 The true reason behind all these videos: *CHOP SHOP!!!*
These are BRILLIANT BTW. I'm binge watching all of them on a Sunday morning.
Haha not exactly a shop, more of me taking my inquisitive hobbies to another level
He is expaining things so efficiently which will lure you to watch more of his videos. Just look at this video total time and the numbers of things he explained. Owesome man.
I absolutely loved this video. Easily explained at a fast pace with actually taking it apart for great visuals. This is the best way to learn
Thank you for tearing your car apart to show us the Ac System.
You are welcome!
I dread the day when something eventually goes wrong with my car's HVAC system...now 19 years old and going strong.
Another great video. Thanks!
+wholeNwon Thank you
Yea that AC system is a bear to service.
Very nice visual representation and video
Thanks, I'm glad you learned something.
Customer: WTF dude I just wanted an oil change.
Haha! Well and now he's got a dash change
Customer: so how the oil change go.
Shop: oh about that.
Customer: wtf you do my car
Shop: we f**ked up
Wasn’t that at a line from the Mask
Wow, it must have been a helluva job stripping the dashboard and removing the HVAC system. Good job and thanks for the video.
+aussieboy77 thanks. This was my second time removing the Dash's o it was not too bad.
The filter drier is for filtering the refrigerant from contaminants and not to dry the refrigerant good job explaining how everything works
Your welcome
It dries the refrigerant too. Any water you missed when vacuuming is absorbed inside it.
This is very well explained..i love this dude....somehow he makes u understand all this rocket science stuff...God bless You...
Glad you enjoyed it
I am learning about air conditioning cooling and heating systems, your video helped me a lot, thank you very much
You really have a talent to teach. I have never learn so much in such a short time until now.
This video gets straight to the point and I learned from it. Thanks!
This dude is doing the lords work with this video! NO ONE actually shows you this stuff its all just basic theory....😒
Its like SHOW ME WHERE THESE PARTS ARE!!!! Thank you , Thank you, Thank you!!!!
I watch all videos at 2x. Hat tip to you. I cant remember the last time I went down to 1x speed but for your video I did.
I like to make my videos short and to the point.
Really fantastic video. I watched it with my 3 year old son who has been very interested in heating systems and electronics of all kinds as of late. So this was very informative for us both. I will say the pacing of the video is very quick but there's so much information presented in an easily digestible way that it is forgivable.
Glad you found it useful. Thanks
Absolutely unbelievable. I’ll be able to rebuild an entire vehicle confidently with the knowledge stored within your channel.
Thanks. Unbuilding is the best way to learn
Wao! This is the best video I've found explaining the car AC system. Looking at the real parts makes sense. Thank you so much for putting this together in a short but detailed video.
Glad you appreciate it so many years later!
You cracked me up when you started the car..... Gotta love your videos. Looks like a nightmare on taking it all apart
Ah it's more fun taking it apart than putting it back together
Dehumidifying the air with AC before running it through the heater is a really great feature in cold climates. Keeps windows from frosting up on the interior, but most people aren't aware they should use AC in the winter.
You are correct, AAC dehumdfies
so helpful! I'm trying to resurrect a car that had mice in it for a long time. I have no car knowledge but I have some hope now that I'll be able to access their den and clean out the smell. This is a huge help. Thank you!
Thats last part made my day.... starting the car. I will be doing the same (transplanting stuff into another car) and your videos are a blessings. Thanks a lot for sharing your skills.
Glad it helped
Thanks a lot man !! you are the real one to deliver useful information in a short time by actually showing how stuffs work in real life. I recently bumped into your channel and i'll gladly watch whole ads just to show you support.
Best explanation I’ve ever seen for car AC
You are the best auto mechanic in the world.
Crazy respect to you for being able to fit so much VERY USEFUL information in the least amount of time. I always learn so much from every single video no matter the topic. Everything you show is so useful and really helpful in understanding how the complex things in cars work, especially the stuff you can't find info about anywhere else!
Great video! It's rare to find a video that explains things this well and in such a short time. Thanks!
You are welcome!
Your genius level is off the richter scale...
I love it
This guy is a true teacher. Show and tell old school 🏫 🏅⭐️
Thanks, that's my style 😊
You deserve more subscribers . am now working as a trainee in honda they won't even explain there but you explained very well. take your time and explain slowly step by step . we are not going anywhere.
Thanks, and good to know about Honda training
I trust a man who explains stuff with an old toothbrush.
PLEASE NEVER STOP DOING THIS I CANT STOP WATCHING
I love your videos! But you got one thing wrong. The refrigerant doesn't undergo an endothermic reaction. In the expansion valve the refrigerant evaporates causing it to cool down. No reaction takes place because there's no chemical change taking place, only a phase change.
+Trey Ah I see, its more of an endothermic phase change than a reaction. Just like water evaporating.
I knew someone was going to go there...
+Ronin Well I can't get everything right...
Exactly, it's an endothermic process.
was mainly joking about treys nitpicky comment. ) but yes thats true.
I was looking for a video on the basics of HVAC design prior to an interview; perfect!
You are welcome!
Professor, you have spoken on everything.
I have covered many aspects of the car but there's always something new to learn
4:41 i really didnt know if the refrigerant travel throughout the whole evaporator but you solved it for me. Thanx
You made a HVAC video (which was great explanation), but at the end stated a few important facts. Thanks.
Superb detailed explanation of how the HVAC system works in a car. Thank you for posting.
You are welcome
Amazing video man! I'm an automobile engineering student and This video helped me a lot to understand the HVAC system, quite fascinating!
4:45 it’s actually a plate heat exchanger, coolant flows up and down every one of those plates/fins - plate heat exchangers are pretty cool!
They sure are. Thanks
Cheers for making this informative vid mate finally got my heater to work spent three days trying to work out why.only eight minutes to watch video and fixed in ten thanks again saved me heaps.Kiaora from taranaki .New Zealand
Glad it helped you!
Of all the 50 videos watched today, yours was the most informative. 👑 Subscribed.
This Guy's videos has so much information
WOW this is one of the most concise, accurate, and informational videos I think I've ever seen. THANK YOU!
Glad you enjoy my teardown
the vin failed on my car, I've gotta change it :-D
Gonna have to take it to the dealer.
@@davecrupel2817 you didn't watch the video
@@texasblaze1016 You didn't get the joke.
Thanks for teaching me what to write for my university group work
Haha I'm glad it helped your assignment
You, sir, are legit. A true master at your trade!
This is a fantastic breakdown. Fast paced but very clear.
Your welcome
A unique video with maximum information in minimum time dismantling dissecting . Unparallel ability and really appreciate you sir.
Thank you
Forget going to UTI, I could just watch your content!
Nobody does it better than this guy
VIN stamp FYI.... love it!!! Keep up the great work sir.
+Adam Fredell thanks...
Yes that Vin stamp is behind that dash
Probably easier to get it by removing windshield.
@@speedkar99 I guess this is good to know if you are a car thief
Awesome explanation. Always wondered what goes on inside my car ac.Thanks much
+Zach Grassstone Sweet, glad it helped you understand.
by far the best visual explanation
Thanks
You are a great Automotive Mechanic Teacher, God bless you, so much.
he taught us what we all know now, but not all of his knowledge
Keep up the awesome work sir! Instant subscriber... FYI I hate subscribing to channels (specially when I’ve only seen one video) but this is just worth it! The information and quality of content you provide is on a whole other level.
Thanks very much! I got more to come.
This series is very informative, especially since I own a 1998 Toyota Corolla.
+Dillon Opossum thanks. I have a dozen or so left
Nice I admire you since i saw the first video long time ago you're awesome great knowledge and super clear when you're explaining it
Good description of a TVX AC (not CCOT) on a Toyota. You know your stuff!
Thanks. Check my auto HVAC video posted last week!
@@speedkar99 I will (edit: TXV.. my bad!!) check your video out! I just did a rebuild of my CCOT system. If you get one, do a VOV explanation and why it's important for heavy duty applications. I used that in place of my FOT. Makes a tremendous difference in heavy traffic, up to ten degrees difference in DAT in slow traffic. You've really got your stuff down with HVAC. Thank you again!
You are welcome
I love this guy how he explains everything
Thank you
you are a good teacher with an easy to understand message👍🏻
I'm glad you like my style
Your videos are just awesome!!! You cover all the things about a topic......
Thanks ...I hope to do more in the future.
not just great engineer yet great lecturer explanation especially cut off parts to teach! you can do well online lecture class!
Genius, defenely some one that knows what is doing great videos
+Mauricio Lezama thanks
Check out my other videos for more
Genius! Tearing apart junk cars to teach. Awesome.
Seriously? Car was dismantled, but it was not a junk car. He powered it on toward the end of the video and it worked.
Thanks, this was an awesome video and I learned a ton!
Air goes through the evaporator first in case you want to defrost the windshield and run the heater. You still have to remove the water before you blow the air on the windshield if you want to remove the fog from the glass.
Yes it dehumidifies
Great video, straight to the point!
That's my style!
One of the best videos Ive ever seen
Thanks
Very good explanation on the HVAC system.
excellent presentation ! thankyou for all your work posting this !
Wow... will done my friend thank you for all your knowledge.
You are welcome
Man.... That's the best video EVER about how a car system works (haven't seen your others videos yet)
OK.... I juste take a look at your channel... Seems like i'll spend a lot of time !
Speedkar99 PRESIDENT !
Thank you
All these months at UTI down the toilet. I learned more from you than UTI...LOL
Haha
Thanks for the help- I'm changing my VIN today.
Thank you man,ive seen bunch of your vids.all on point and super easy to grasp.in this particular one.i wanted to see how blower works between heating and cooling.
Thanks for the kind feedback
This is the video i was looking for. Gotta find that "one" videoagrapher that explains things in a way that the person watching will understand. I've seen many.. MANY videos on auto a/c system. Didn't understand, your video changed that.
Thanks for the high quality content! My thoughts on all the parts coming out of the dash.. damn that's a lot of work. Thankfully only my blower motor, TXV valve and Evaporator are in the dash within the same black plastic housing. (mine was a pain to get out.) I have new drier/receiver coming as well as a new TXV valve, though mine is ok, i figure what the hell.. it's a cheap replacement (not OEM). like < $20.
the best explanation I've found
What an excellent explanation, thank you. I understood everything .
Great video. Very thorough and well explained!!!!
Very good Video. I thought the car was a junk car you were using for example. Then you started it up. Thought that was funny
I did end up junking it...see my other videos
Hats off to You sir...but had to adjust playspeed otherwise i have to watch 100 times