How a Car AC System Works - For Beginners
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- How a car ac a/c system works, how does an ac system work?, how do car ac systems work, what are the components of an ac system, how does an ac compressor work, how does an a/c condenser work, what does a receiver drier do, whats the difference between a receiver drier and an a/c accumulator, acumulator, what is an expansion valve, how does an expansion valve work, whats the difference between and expansion valve and an orifice tube, what does an evaporator do, where is my a/c evaporator located, a/c systems explained.
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Due to factors beyond the control of Ratchetsand Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchetsand Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchetsand Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchetsand Wrenches.
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Best basic description of AC system operation I've seen.
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!!!
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.
u r right
Is that, he is! right.
He did great! Tell that to a teacher on the year 1950’s and he will tell you , “get out of my class!”
Laser invented in the 1960’s
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.
Did you not watch the end of the video? At 8:41 he mentions this.
This is exactly what I wanted to learn tonight (2017). Great explanations and thankful this was here.
Wow great explanation. Although this was specific for a car AC system, this explanation is also perfect for any basic AC system. Great Job.
Extremely well done. You're an excellent instructor.
Your an idi**
YOU DONT KNOW ANY BETTER. THAT GUY IS ONE OF THE WORST INSTRUCTORS (if you can call him that) I HAVE EVER COME ACROSS.
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!!
I had to give you a thumbs up you did a good job explaining the AC system. Good Luck!
+Micscience Thanks, glad you liked it. Cheers
Well Done Video, really simple and well explained. I wish he would've mentioned a few other things that are part of the ac system like the high and low side pressure switches and the condensation drain for the evaporator. Small things like those are important as well.
God Bless the People with the Gift of Explanation 🙏🏿
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!
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.
Calm man, You good explains and kind comments, I worry Scotty Kilmer talk too fast short explanation.
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.
Great. this is a public service without bureaucracy. thank you
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
Great job explaining the basic AC system
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.
+Addison Elliott Glad you like the video, thanks for commenting.
Thank you for your a/c videos. Though I’ve worked on lots of cars, I never worked on an a/c system until the system in my 2005 Silverado died. Your videos clearly explain how a system works and what to look for when it doesn’t. Thanks again.
Very well explained how the whole thing works
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!
He needs to be an instructor at some school
what a great breakdown, your absolutely right
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!
So South Main Auto is having their customer do the work? Harsh bro, but I guess that’s the cost of doing business eh?
Like your video and your flow chart was spot-on.
How does the A/C system flow diagram look for a vehicle that also has rear cooling lines such as found in a Chevy Tahoe? I've seen a few videos in which the front vents were blowing cold but not the rear. I've also seen a video in which an owner apparently had issues with his rear cooling and instead of fixing the problem, he blocked the lines going to the rear of the vehicle by installing plugs. These videos with rear cooling issues lead me to believe that there is a separate component (and therefore something that can stop performing) that routes the refrigerant/cooling to the rear without effecting the front or else the front wouldn't be blowing cold as well. I appreciate any light you can shed on the subject.
Good job from Bangladesh ❤❤.
Simple, now I gotta go locate these in my car.
This guy knows his stuff 👍
thank you so much for dropping this knowledge ,I will watch more of your videos now
Great information man, very well put together, easy to understand, thank you for sharing.
Great knowledge and experience 👏
This and those post like this one is excellent, however we find tons of videos like this but you can't find one single video explaining what to do to troubleshoot bad control or actuator wiring, we have enough video's on the web telling us about under the hood, we need a break down on the BCM and EMC and how these items work with your car or truck HVAC system including the head or what most of us call the control unit., if you can do a video on this you can easily do a video on what would cause an actuator to stop operating as it should.
Well put together and easy to understand, thank you!
that a great description now i understand how it works thanks for that
Refrigeration is one of the single most important inventions ever, it revolutionized the way we live work and even play with indoor arenas able to be used in otherwise unbearable conditions, it also has numerous health benefits, can you imagine being in a hospital stuck in a bed for days or weeks in the sweltering heat? We owe a lot to Mr Willis Carrier.
Thank you very much. Easy explanation and very helpful.
awesome vid man very thorough, thanks!
Wow, thanks for making this. Very good. I learned a lot!
Great video! This actually clears up a lot of things I needed to know while repairing my own ac. Thanks a bunch!
does changing the ac compressor and condenser to a larger one makes the ac colder?
Thank you an awesome video I had a problem understanding before but this video sought it out please upload more on air braking system
Like your video man and your accent as well, two thumbs up for ya
Awesome video man, thanks! Helped me quite a bit.
Enjoyed watching this one as well, Thanks.
***** glad you liked the video's, stay tuned for more. Cheers
That is very cool! Thank you.
I enjoyed your video. It was very helpful. Thank you!
So your evaporator is also the heater core? If you change let’s say your heater core or radiator your saying you should also change your receiver dryer??
Could you kindly do a video on a Isuzu Bighorn's Air conditioning blower removal, cleaning and replacing it together. 4XJ1
2 thumbs up! I love your videos. I've learned a lot and thanks for making these videos!
Very good video keep them coming
Very educational video. Thank you so much.
+elguapo21954 np, glad you found it useful. Cheers
Forgive my ignorance, but what do you mean when you say moisture at 3:46. Th refrigerant leaves the condenser in liquid state, runs through the receiver/drier which removes contaminants and moisture (my understanding of the word would define that as a liquid, the refrigerant in this case). After the receiver/drier removes the moisture it still leaves in a liquid state. Is moisture in this context defined as condensation? If it is defined as condensation how does the receiver/drier remove it from the refrigerant? Am I missing the concept entirely? Someone please educate me.
how much heat a/c condenser?
Great video on how the system works in general, thank you.
I have 1986 190e which the A/C doesn't work, the compressor doesn't comes on. I changed the original compressor and the dryer to 134A compatible, changed the push-button & A/c relay, and the pressure switch, still no luck, would you direct me how to fix it. Several local mechanics has charged me to the nose, yet no A/c
What is the difference between reciever drier & filter drier ? !
Great video!
Xtremely informative thank you
Great vid man, thank you!
Good. clearly understood.Thank you
+MrNuwan2007 np, glad you liked it. cheers
Solid video dude!
Many Thanks, good explanation.
Super job, well done thank you.
I see this video and I can’t figure out what’s wrong with my car. I’m installing new compresor I make the vacuum put in the ac refrigerant. Have no leaks and still don’t work. Can I do something more for my ac work?
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 educative thank you.regards
Good. Clear understand. Thank you.
+MrNuwan2007 np, glad you liked it. cheers
Hey Brother awesome instructions. question do you have a 2001 Dodge Ram 1500 3.9L ac wiring diagram? my 10amp fuse keeps burning out. Do u have any suggestions?
Hi can u tell me what decide how long compresor cycle is ? Is it only Evap temp sensor? Or something else too
Sir in evaporator where the airflow starts,is it from the side where TVX is nstalled or after the tvx/
Thankyou very much for your video. I learned a lot :)
Super Helpful! Thanks!!!
My ac drier has the word (in) on top of it my question is do you put it on coming through the low pressure side or the high?
Subscribed!
Great job buddy 👍👍👍👍
sir can you tell me how to calculate cooling capacity required for a car and also power input required for compressor
doe it mean the whole process starts from compressor?
It will be a couple of days before all the links work.
thanks for the video very helpful!
I had a voltage drop and I found at least 1 from license tag light. And I had a chirping noise and it only makes the sound when I turn AC on. I've got starter rebuilt and 2 alternator's I put on and it's not losing as much voltage now. Could it be the AC relay but I just switched 2 the same. Please help me. Oh I cleaned battery cables and al grounds
My clutch flops. Now the bearings are grinding. I can't get it fixed until Nov 4. It makes a loud noise. The compressor needs replaced. I'm afraid to drive it because I think I will damage something in my car. It's really loud. The AC is off, but the noise from the bearings grinding is really loud. Is it ok to still drive?
Hi, I have a question I have a couple of cars I'm getting power on pin 30 and pin 86 the other 2 is ground when the relay is removed but the only way I can get the ac clutch to engage is if I bypass it , do you where I should look for the issue to get to work the right way ?
So basically the magic happens when the freon and whatever its in it changes its condition from gas(hot) to liquid(cold) and that reaction makes cold?
After AC gas refill, my car developed braking problem when AC is on. The peddle becomes very hard to press which delays stopping time
My car AC cuts off when I’m stuck in a bad jam. And when it cools back down, the AC will start working again. It doesn’t always happen but seems to be getting more frequent now. What could be the problem? I hope you can help . Thanks in advance
Keep up good work .
But how does the clutch know when to disengage?
If you where to drop something in the windshield air vents where will they end up in?
In the ducts. It will surely have to fight with the blower fan before reaching the cores, though. So all it would take to remove it can only be to remove the blower fan.
My 1993 Chrysler Town country...turn ac on but it stays off. But when the engine warmed up the cooling fan turn in and simultaneously the AC comes on..after a couple minutes the cooling fan goes off , the AC off along with it until the fan Runs again...I was thinking about hooking up the fan to 12v with a switch so I can turn the fan on so the AC would come on with it anytime I want..can It be done or will it burn the AC compressor...can you help
Do some condensers have the dryer built into them? I was told my 07 RDX had to get a new condenser because the dryer is also part of it when the ac compressor was swapped. Not sure if what they told me was true though.
Is it safe to paint a Ac Condenser?
Some minivans for 2 evaporators is there a way to get it to run at a100 % I find many have problems doing this type system. What I'm asking is if there is a trick?
hello my car ac compressor on and off every 10 sec I check the gas and it charge because when car is off low pressure 120 psi do think type of r134a which available are bad type cause this problem or the condenser or thermostat or what u suggest for me to do
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 ?
Thanks good vid. Maybe a heating system lesson next. East coast is slammed with cold. I always wondered if keeping the heat adjustment knob at cold when the car is warming up helps it warm up faster cause the coolant will not be spreading through the heatercore hose and losing heat. Any truth to that? Thanks!
Hi, I have a video on how to fix no heat issues here: th-cam.com/video/eai_tFzltLc/w-d-xo.html
and yes keeping the adjustment knob at cold during warm up will help warm up the engine faster, you will have coolant in the hoses and heater core but it will be blocked off from the engine side so only the coolant on that side will need to warm up. If you have an automatic climate control unit this is done automatically. Good thinking, and thanks for commenting. cheers
Is the receiver drier the same thing as an AC accumulator in other cars?
No, it's not the same thing. The receiver dryer is located before the evaporator. The accumulator is located after it. It's meant to be that way because the orifice tube can't adjust itself to varying thermal load so the evaporator is always flooded and some liquid may spill into the suction line for ex. when you turn blower from maximum to minimum speed and that's why a "tank" needs to be right before the compressor. The TXV can adjust the flow so that no liquid exits the evaporator at all times (except, perhaps, when you force the TXV to work with very low loads such as if you tamper with the blower so that the compressor runs even with the blower off) so that the "tank" can be placed before the evaporator and there's no impediment at all to the suction gas flow. True that they both hold the system's desiccant charge, but functionally they're not the same thing.
Good Video, thank you for posting this. it helped me immensely!!! I do have a question though... as you stated, you "should" replace the "Receiver/Dryer" every time you expose the A/C system to the atmosphere, so if you do not have one, and have an accumulator, do you have to replace it as you would an Receiver / Dryer?
The accumulator contains a dessicant charge exactly like a R/D. So yes, you need to replace it.
Very nice
PV=nRT might be helpful a equation for the science guys
Great Video