How does Car Air Conditioning Work?-Components and Their Functions -Car AC system

how does car air conditioning work?
Topics Covered:
Car AC system components explained
The science behind automotive air conditioning
We’ll explore the essential components:
the compressor,
condenser,
expansion valve,
evaporator,
Air Filter, and
Blower Motor Fan.-and their roles in regulating temperature and humidity inside your car.
Whether you're a car enthusiast, a DIY mechanic, or just curious about the technology that keeps you cool, this video provides all the information you need to understand and maintain your car's AC system.
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[@prism2451]

I find it amazing how many things are stuffed inside a car. Engine itself, transmissions, compressor, radiator, batteries, electric motor for starting, alternator for electricity production, radiators, brake enhancers, differentials, torque convertor and many other things. All have to work in tandem and they often do for decades without fail.

[@muhammadrasool5554]

With EVs we have less than what we already have also more effective and environmental friendly.

[@xXFaZeAdAyAtXx]

@@muhammadrasool5554 yeah but then EVs ruin the feeling of a real car. It kinda like driving a ghost, sure sometimes is good, but for real excitement ICE never fails. I think EVs should be the main alternative, but not banning ICE

[@glowiever]

​@@muhammadrasool5554litihum mining for ev is not environmentally friendly.

[@noahw5887]

​@@glowieverRunning a gas engine isn't environmentally friendly either. The energy output of a gasoline engine is 20-40% EVs are 80-90%. Drilling for oil isn't good for the environment either!

[@jakey3442]

Best AC understanding on youtube so far! Thanks

[@Jacob99174]

And KZbin has been online since 2005! Wow! 🎉

[@motoringmasters]

@Jacob99174 thank you brother

[@KingBueno619]

I didn’t search this but wanted to see how it works

[@EdwardNewgate09]

Same here. Minutes spent well. Thanks to the provider for those valuable infos

[@Davewutsup]

Red alert check your cabin filter and just above it where mice build nest,, and there is mice feces disgusting or even a chipmunk,, and you are breathing it every time you have your air on. You must mouse proof your air flow in the cabin of your vehicles!!! Pop your glove box wide open and you can get to it, to check the filter and the area just above it,, there's usually a big enough place up in there that a mouse can build a real nice nest, so disgusting you're breathing that air. I'm going to feed some metal wire up into that space and loopy loop fashion, and fill in it in so they are not comfortable to linger or build a nest. Also I'm going to find any other areas where they can get into it and screen it off!!!!! Each vehicle will have a different air circulation system within the cabin.

[@Max-Jet]

Spotted a couple of mice poops already. hhhh, they left but still smell their presence till the filter changed

[@whatskrakin37]

@@Max-JetYea you’ll need open your car windows for a while, perhaps spray some air freshener spray. And vacuum your carpets and use wipes on all hard surfaces that may have trapped some smell. I had a bad smell in my car from the previous owner and I did this along with scrubbing and washing the floor mats outside. My car smells pretty fresh now.

[@GodsWorld189]

Just cleaning your condenser and fins can have a dramatic difference, a lot of people don’t know this, plus your cab filter. Great video. 😎

[@dukinse5198]

How I can clean my condenser and fins?

[@JackMaslovCZLive]

@@dukinse5198 They are infront of the Radiator, as you open the hood of the car it's the furthest upfront thing. I think a soft brush or a water hose should help in cleaning it.

[@berke6078]

As a mechanical engineer, this is the best video I've seen explaining working principle of car air conditioning

[@a.jhit2235]

i was just wondering if you would explain it on ev's. then when i heard "EV's" i was like YEEAAAA BABAY THATS WHAT WE"VE BEEN WAITING FOR

[@RetroKingOG]

Just ask Range Rover how theirs works, it will most likely be in the autoshop any way!

[@JeffPepe22]

Excellent video thanks.

[@elite4championjosh]

Now add all the modules and electronics from manufacturers that prevent the simplest operation of this system not to work.

[@coldbrew6104]

So, they do work? According to your words 😅

[@elite4championjosh]

@coldbrew6104 they don't. I just recently charged a customer $1900 to replaced the HVAC module. The entire system was perfect but the computer was dead. That doesn't happen on older models. And that computer was behind the dashboard BTW, I'm in Texas where yesterday the temperature was 111 degrees.

[@mtnslyr]

The only problem here is the way condenser is illustrated will make people confuse it with radiator. U show a huge condenser right in front of the engine.

[@motoringmasters]

Thanks for pointing that out! I can see how the illustration might lead to some confusion, but I'll make sure to clarify the differences in future videos.

[@melaninking4551]

Please make a video about how airbags work. Thanks

[@nisarggovani9799]

What if accidentally liquid goes into compressor?

[@Soulfashion]

Nice video ..very neat and precise explanation...

[@MarionAdair-j9z]

Jackson Steven Robinson George Smith Thomas

[@dnkmmr69420]

Can you do a video how cars are heated inside? Also include how it is done for EVs as well.

[@motoringmasters]

Great suggestion! I'll definitely cover how car heating works, including the specifics for EVs. Stay tuned for an upcoming video on this topic!

[@dnkmmr69420]

@@motoringmasters yay can't wait

[@achillissssss]

make a video on how the heat it works, (for winter)

[@motoringmasters]

Sure

[@MrArun92]

Extraordinary work 🇪🇹

[@MrsButed]

I thought the air conditioner was a radiator for the engine😭

[@motoringmasters]

😀

[@BACKUPKushPatel]

In a very similar fashion, the AC system or split system heat pumps work for cooling or heating your homes. As a mech engineer, it's nice to see how it is implemented in cars. 😊

[@glenverduchi5000]

I'm an automotive instructor at a tech school and just discovered this video and I must say it's one of the best i've found thank you and keep producing content you earned a subscriber

[@motoringmasters]

Great to hear!

[@okymikhael6470]

well explaination king 🔥

[@Max-Jet]

Such a great tutorial video 🎉

[@motoringmasters]

Thank you!! 😊

[@hatbui8438]

Thank you very much!

[@dorothyhowell6355]

I'm here To try to figure out how to keep mice from getting into my Cabin filter you know the air conditioning and you're heat Air flow.

[@motoringmasters]

Still the world does not know how to deal with this problem 😁 However, I have some solutions, you can try it. Place a fine wire mesh or screen over the air intake vents to prevent rodents from entering. Make sure it is securely fastened and doesn't restrict airflow. Keep your car's engine compartment clean and free of debris.

[@solankibharat8963]

Nice information

[@shab2283]

This was AMAZING explanation, the animations made everything crystal clear. Thank you

[@crackedphoneguy3607]

Iam 14 and Iam a car enthusiast and I often help my dad with his car because he doesn't know we'll about cars sometimes I tell him to change this and such and such he doesn't do it😂

[@eury360]

If you regularly wash your Car, Mice won’t stay in the engine or the A/c System. The water pressure should scare them away.

[@philippebuch]

Thank you @Motoring Masters, that video was awesome! Now I understand what my dad was speaking about when I was a kiddo :D haha

[@ryans413]

If you have an orifice tube you’ll have an accumulator instead of a receiver dryer.

[@motoringmasters]

Yes, that's correct! I explained this simply in the video-systems with an orifice tube use an accumulator, while those with a Thermal expansion valve use a receiver-drier. Thanks for watching and sharing your input!

[@Edu4rdo6991]

I ended the video here 7:16 now i understand more how the ac works. 😮

[@MrsButed]

THIS IS FIRST TIME A YUTUBER HAS REPLIED TO MEEEEEEEE🎉🎉

[@lucianomurer]

I have a Ford Fiesta 2014, sometimes in high temperatures (i say that cause of the dash shows the temp) when is marked 28° to 34°, If the ac is on, the car will stall nonstop, i never seen this before, so weird and anoying.

[@motoringmasters]

from AC side it could be AC Compressor problem or other pulleys(Alternator or Power steering pump) which is connected to the Compressor via a belt. Also check the Refrigerant level. other than that, it could be throttle body, injector or fuel pump. There may be problem with any of these parts in your car, a mechanic can easily find it out, better take it to a good mechanic and get it checked.

[@alfgar5210]

most thorough video yet👍🏼

[@motoringmasters]

Glad it was helpful!

[@Mr.CuriousGuy]

Soo much to learn from all this…

[@jeffsubero1234]

Thanks it was educational

[@weirdfan88]

I don't use it, but it's nice to know

[@anaselbe5063]

why in all AC videos, we found only the cooling, how the heating is done?

[@nordicpride9708]

Heating is very basic. Heater core is located in HVAC box. The heater core receives hot coolant from heater hoses (plumbed to the radiator of the vehicle). It uses blend door motors to close off this heating circuit when the ac is selected and turns the heat on when it goes the opposite way. This can be fine tuned by selecting desired temperature on climate control so it’s not merely a On/Off motor, it has many positions.

[@elton245ify]

So what if the vehicle is idle? Will the compressor work harder than the vehicle moving??

[@motoringmasters]

In idle, the engine runs at a lower RPM, which means the compressor operates at a lower speed. condenser fan is typically the only means of dissipating heat from the AC system. but this is not as effective as the airflow generated when the vehicle is moving. As a result, the AC system might struggle to cool the cabin as efficiently when the vehicle is stationary. This can cause the AC to take longer but not harder to reach the desired temperature.

[@dd___dc]

In need reliable ac i need a EV

[@anefatunyuydufombiy4338]

The explanation was super clear I love it❤❤❤❤❤❤

[@motoringmasters]

Glad you liked it!!

[@Ludak021]

How can hot gas flow through water that cools the engine? (2:35) I know it doesn't but you say that it does.

[@motoringmasters]

I said the hot gas flows into condenser near the radiator. Condenser is located next to the radiator. Radiator and Condenser looks very similar with a small difference so don't get confused.

[@motoringmasters]

There is a difference between the two where the gas goes to the condenser and the water in the radiator.

[@Ludak021]

@@motoringmasters I get confused because I only have a radiator in front of my car, on the side of it there is a condenser where AC lines go into, the chamber is extended over the top of the radiator (possibly the bottom also) where the line starts again going to the compressor. I assume the chambers take advantage of the airflow going through the radiator and kind of piggy-back on it to cool the gas a bit before it get re-introduced back into the compressor. By no means does it go through the radiator fins like it's shown in the video. It might be different on different cars as in, having another radiator going over the main radiator, but idk, haven't seen one yet. edit: At this point I assume that in your video you are working with two radiators, the engine one and another one over it for the gas. I have no such thing in my car. As I stated, one radiator. Perhaps that's why this was confusing to me. Thank you for replying by the way.

[@motoringmasters]

In my video, I have shown only the condenser. What you are talking about is a radiator. I am not talking about water and radiator in this video. Please go back to this video and see it clearly.😟

[@motoringmasters]

Radiator and water makes the engine cool, but in this video i don't talk about the radiator at all.

[@saurabhjaswal9671]

Number one❤

[@CatsForLife21]

Thanks. #OneMessageFoundation

[@JohnJohn-dc7id]

informative video

[@JackKing12.]

Everyday is a skool day 😁

[@soundtrip2563]

Just maintan that your floor is always clean

[@motoringmasters]

Well said!

[@VIJAYPM-YT]

Thank you!

[@jishan6992]

AC systems have always eluded me because of their complexity, thanks for the explanation

[@6119misha6119]

TELL ME is it normal to drive with ac on LO and the ventilator on 2 bars , instead of putting it on automatic and just normalize the temperature slightly lower than the outside , can someone answer please

[@motoringmasters]

Yes, definitely

[@6119misha6119]

@@motoringmasters thanks for reply ! I think your video is the most logical on youtube !! , i see so many car enthousiasts with ac on LO and window open and clearly see a automatic button

[@ercanyesiltas]

I usually leave it at 21 degrees celcius and 1-2 bars. feels much more efficient to just leave it at 22 and go through all that noise

[@omarkharnivall2439]

How the airflow is controlled through the vents? i mean between dashboard and floor and to the front glass?

[@motoringmasters]

Air flow is controlled by a series of dampers, flaps, and shutters that are operated either manually or automatically. In old vehicles, you manually operate knobs or levers that are connected to cables or vacuum lines. These, in turn, move the dampers to direct airflow. Modern vehicles use an electronic control unit that adjusts the position of the dampers based on inputs from the user and sensors. The user sets the desired temperature and airflow distribution via the control panel, and the ECU adjusts the dampers accordingly.

[@omarkharnivall2439]

@@motoringmasters decided to google it. Thanks for the answer, I was looking for the blend door actuator or something like that.

[@bharatbshetty]

very informative and easily understandable. I have a Hyndai Xcent 2014 petrol model and it has a bad AC system and it stops chilling after 50kms drive and from thereon it will be just like a air cooler instead of air conditioning. I have replaced new evaporator and new cooling coil in service center but still same problem. When enquired with a local general car service center they have advised me to replace compressor and problem shall be solved it seems. I am tired. can you suggest me like in general what might be the problem?

[@motoringmasters]

Yes, The AC compressor may be the real culprit here. But I can answer only if you tell me all the symptoms that happened to your car. Does the AC provide good cooling in the morning and at night? Is this problem only when the afternoon is very sunny? And how many kilometers your car has run so far?

[@bharatbshetty]

@@motoringmasters The AC runs without chill most of the time (just blows air like a cooler mostly. There is no chill in automatic also when temperature is 16 degrees and recycle mode). I have checked both in auto and manual mode but same problem persists 😢. In all this 11 years of time the car run around 35k km.

[@bharatbshetty]

@@motoringmasters 👋 I request for a reply. Thanks in advance

[@motoringmasters]

sorry for the delay! If the compressor isn’t pumping refrigerant effectively-maybe due to a mechanical issue, electrical problem, or low refrigerant levels-the AC won’t be able to cool the air properly, resulting in just blowing room-temperature air or only slightly cooled air. I’d suggest checking if the compressor is engaging when you turn on the AC. You should hear a click and see the AC clutch engage. however, If the compressor runs properly and the clutch engages properly, it also may get the bad pistons and not pump the refrigerant properly. In my experience, the compressor is usually the problem.

[@bharatbshetty]

@@motoringmasters thanks for the reply. Will check it with a technician 👍🏻

[@PigeonsLoverOmar]

Thanks

[@sewminadilshan7223]

So in high RPMs the AC works faster?

[@motoringmasters]

At idle, especially in very hot conditions, the AC may struggle to cool the cabin quickly because the compressor is running at a lower speed. Once you start driving and the RPM increases, the AC system can perform better. and Beyond a certain point, further increases in RPM won't significantly improve cooling.

[@sewminadilshan7223]

@@motoringmasters thanks for the explanation. You learn something everyday. I've seen the engine rpm increase when idling with ac just turned on. Could be the ECU doing it to workout that ac

[@motoringmasters]

Yes, that's correct. The ECU often increases the engine RPM slightly when the AC is turned on to compensate for the additional load the AC compressor puts on the engine. And also the oil pump circulates engine oil more efficiently, This improved circulation helps ensure that all engine components are adequately lubricated, It's a smart way to keep the engine running smoothly!

[@blackriderph4340]

Good stuff

[@Creative_eye07]

Vary informative video well explained 🎉 I have a question, what hapend when we set temperature to cold or hot in manual ac systems dose it affect car fuel consumption and how we get better mileage with ac on ? Thank you

[@motoringmasters]

Technically, in the engine side when the AC is turned off, the mileage is high, but practically, when the car comes and drives on the road, the mileage drops due to aerodynamic block when windows are opened. using AC can increase your fuel consumption by as much as 10% but opening the windows at higher speeds can increase fuel consumption by as much as 20%

[@Creative_eye07]

If I set temperature to little bit worm side ( 28-30) dose ac compressor feel less stressed ?

[@motoringmasters]

Yes definitely, the cut-off time for the AC compressor will increase, so it works less.

[@Creative_eye07]

@@motoringmasters thank you very much 😁

[@madhanm7043]

​@@motoringmastersThe cutoff time decrease or Increase?

[@nvgwd3r]

Great video

[@motoringmasters]

Glad you enjoyed it

[@MrsButed]

Im liking

[@motoringmasters]

Thank you

[@johnhicks9542]

2014 Mustang, outlet temp in the cabin will drop to 40F or lower, then warm up at the same time the air flow is reduced. Turn the AC off for about 5 minutes and all is OK again for awhile. Seems like the Evaporator is freezing up and blocking airflow. Several components (including thermal expansion valve) have been replaced, but so far, No Joy. Any ideas on causes and repairs? Car has been to 2 different shops so far and both have given up.