How Does a Central Air Conditioner Work? - HVAC Repair Tips

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Central air conditioner does not cool, too noisy or does not run? This video provides information on how a central air conditioner works and offers troubleshooting tips to assist you in diagnosing and repair.
Here is a list of the most commonly replaced parts associated with each air conditioner symptom:
Central air does not cool at all: contactor, run capacitor, condenser fan motor, capacitor
Central air is noisy: fan blade, condenser fan motor, contactor, compressor
Condenser fan motor does not run: run capacitor, capacitor, condenser fan motor
Condensing unit does not run: run capacitor, capacitor, contactor
How to disassemble your central air conditioner:
• York Central Air Condi...
For more DIY videos including part replacement and help finding your model visit the repair help section of our website:
www.repairclinic.com/RepairHel...
Click here to purchase replacement central air conditioner parts:
www.repairclinic.com/Shop-For-...
All of the information provided in this central air conditioner troubleshooting video is applicable to the following brands: Amana, Bryant, Carrier, ICP, Kenmore, Lennox, Luxaire, Payne, Trane, York
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Опубликовано:

6 ноя 2012

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Комментарии : 303

@casienwhey 3 года назад

Can we all take a moment and express some gratitude for the man (or men) who invented AC? And also the washing machine.

@skrxcv3192 3 года назад

If not him, some other by this time.

@keithboykins258 3 года назад

It's was a Africa American who invented the A C.

@swathi394 3 года назад

Ac invented by Willis carrier

@curlyhoward8434 2 года назад

I always say that. 🥶

@Elisummit845 2 года назад

I do. I make a lot of money off of his invention 😂.

@repairclinic 10 лет назад

+Mark Pollack - Thank you for the feedback Mark. Yes, we did not mention the metering (refrigerant restriction) device at the evaporator entrance such as a thermal expansion valve in an effort to simplify the process. You are absolutely correct that a metering device is an important part of the central air conditioning system.

@woodentrainseriesofficial9511 2 года назад

Reply to the comment like this

@Gwencallon 7 лет назад

Thanks for your great videos! I've used several to make repairs at home. Today I just really wanted to finally know how the heck my HVAC works! And now I do!

@Ranalla651 2 года назад

Love this. I am in the auto repair business but this fascinates me.

@tenacious645 8 лет назад

This video is far better than the first one I watched. The first one would only be helpful to those who have never even heard of an air conditioning unit before.

@ButacuPpucatuB 3 года назад

Thank you! A comprehensive and pellucid explanation ❄️❄️❄️

@samanthapowers1811 10 лет назад

Very informative and easy to follow! Great video

@jodiryan8915 4 года назад

Thanks to this video, we were able to fix the problem ourselves! You guys are awesome!

@ollydbg8081 8 лет назад

Wow, Thank you so much

@LaneLarson 10 лет назад

Just discovered these videos. I like them! The perfect amount of information for the curious mind.

@AnomalyBreach 5 лет назад

Fuck

@ag6371 3 года назад

We had a malfunctioning condensing unit and we called a HVAC engineer. He thought it wasn't running because of a faulty board. It was until then RepairClinic showed that the problem was either a faulty condensing unit contactor, a wire cut, or a blown fuse. We had to rewire all connections onto the board that the HVAC engineer removed and replaced the condensing unit wire with a new wire and it *started working again.* We *definitely recommend RepairClinic over a typical HVAC engineer*

@Nando-tf6yt 2 года назад

Great video explaining how an ac works! Great way to become familiar with all the components and their functions. Thank you.

@repairclinic 11 лет назад

Thanks! We're rather proud of this one.

@adamhawkins2206 4 года назад

The "compressor does not convert the gas back to a liquid" this should be revised

@marioiacolucci 4 года назад

How about in your car does it work the same way

@repairclinic 11 лет назад

The compressor does not have its own fan. The fan in the unit is called the condenser fan. It comes on as soon as cooling is called for. We recommend using the repair help section of our website to help diagnose your AC problems (link in the description). Have your model number ready for best results.

@prajwalbj9867 8 месяцев назад

Can I get a HVAC notes or detailed pdf from you ?

@ryannichols9452 3 года назад

This is a good refresher for my memory after I took an hvac class for a trade school I went to.

@genericyoutubeusernothings3374 3 года назад

Takin a class rn i just lookd into this to help myself lol

@ryannichols9452 3 года назад

@@genericyoutubeusernothings3374 Better to learn it in any format that makes it easier.

@TheHtmajeed 5 лет назад

repair clinic is great ...... very helpful ..... Thank You.....

@sillieww 6 лет назад

Informative video, THANKS.

@repairclinic 10 лет назад

Thanks!

@khalidsr1 6 лет назад

interested in knowing more about the air conditioning system. Great video. Thanks

@repairclinic 11 лет назад

No problem!

@Texarkanaacrepair 8 лет назад

Thanks for uploading this video, will keep the link so my techs can watch it later

@repairclinic 8 лет назад

Awesome thank you!

@ivanruiz4948 6 лет назад

This is awesome. Thank you!

@ericchoi1610 2 года назад

This is a very informative video! only teaches the theory but also practical!

@loudpackproductions2115 5 лет назад

Great video thank you so much ! You deserve more credit

@airconditioningrepairatlan2438 8 лет назад

Thanks for this video! I learn something new about air conditioning issues

@repairclinic 8 лет назад

+Air Conditioning Repair Atlanta You are welcome.

@khalidsr1 4 года назад

great video showing how do ac works. Thanks

@LosAngelesAcRepair 11 лет назад

Great info. Thanks for sharing.

@flamefurnace 9 лет назад

Great video in giving an overview on repairing central air conditioner units.

@repairclinic 9 лет назад

***** Thank you.

@erdewanekhtiar8577 2 года назад

it was great,thanks for sharing

@ahrjay3326 7 лет назад

very informative, thanks!

@airconditionisrael 10 лет назад

Great vid!

@multiserviciosbarahonabara1493 4 года назад

Gracias fue muy util

@sunyang8989 Год назад

Thank you

@ShreyaSwamy 9 лет назад

Bless you for putting these on youtube. Thank you.

@chriswillow1584 3 года назад

That one kid during gym class : 3:16

@austinhoman5588 2 года назад

Excellent video

@rc6147 4 года назад

Very well made video

@AaffordableairFlorida 10 лет назад

Really Informative, Thanks for sharing..

@repairclinic 10 лет назад

No problem!

@ryk1265 10 лет назад

Amazing!

@logwind 2 года назад

good info.

@fkylw 4 года назад

That was great! thanks.

@perrmyint3098 5 лет назад

Great video

@james77011 2 года назад

This is a wonderful video ☺️📸

@Birtyfurry 4 года назад

i not even have a home with furnace and end up looking up here haha never late to learn something new =P

@sajidmehmood2913 2 года назад

Very good

@lucasperez2513 10 лет назад

Amazing thanks

@repairclinic 10 лет назад

No problem!

@markpollack5604 9 лет назад

First let me say, I love your videos. Professionally done, simple and direct to the point. I know you are trying to simply the process, but your video describes the compressor as the component that turns the refrigerant back into a liquid at 3:12. May I suggest that you revisit that portion of the video. Thank you for listening.

@stephensnell1379 2 года назад

That's because the video is totally correct the compressor is always changing the refrigerant from liquid to gas and then from a gas back to a liquid,the refrigerant also flows through the condenser and evaporator coils too It's similar to Refrigerators

@airconditioningrepairatlan2438 8 лет назад

Thanks for this video Bro!I just learned something new, Good job!!!

@repairclinic 8 лет назад

+Air Conditioning Repair Atlanta Glad we could help.

@seekfactsnotfiction9056 4 года назад

@RepairClinic.com I live in an aprtment. There is a loud annoying sound coming from the walls or Furnace (not sure) when AC is on. I know the sound is everywhere! How do we reduce this sound and make it quiet?

@repairclinic 11 лет назад

That is correct. The air is recirculated to keep it cool.

@elevatorman5468 5 лет назад

You’re videos are very detailed. Keep up the work.

@eduardosalgado3072 6 лет назад

Now I can put one in my home thanks

@wurzelle1999 7 лет назад

cool!

@dawnd4284 8 лет назад

Thanks for explaining AC. I had no clue on how this worked. Now that my central air is not working properly and had two repair companies, a plumber, and an electron come I thought I should become informed since it is still not working.

@MoralRichMedia 10 лет назад

Thanks for this. Great Vid!

@repairclinic 10 лет назад

You're welcome!

@jimbola77 8 лет назад

nice!!!!

@yongchen4158 Год назад

Inventions are the future engineers and scientists

@Joy-yu6pw 4 года назад

Great video I have a better understanding how an central AC works. My puppy chewed a wire leading into the condensing unit from the attic. The wire looks like a ground wire (but not sure) there is enough slack in the wire to splice it. Is this safe to do? Appreciate your input on this issue. thanks

@paranoiddroid9570 3 года назад

I woke up and felt the urge to watch this

@travinator99 11 лет назад

Also should there be little holes in my furnace that let air out? Thanks a lot!

@jielinpeh7420 6 месяцев назад

The first thing I thought of when I saw this video

@repairclinic 6 месяцев назад

You're welcome! We are always happy to help. If you would like to give us a review on Google, we would much appreciate it: g.page/r/CcVUrahZNozMEBM/review We hope that you have a great day!

@joej.9584 2 года назад

The sequence in which you guys described the state change of the refridgerant is incorrect. Might want to change that.

@stephensnell1379 2 года назад

No it's not it's totally CORRECT STOP BEING IGNORANT

@kv8171 6 лет назад

Cool 😀

@xianli6488 5 лет назад

Is it probably the furnace unit blower bearings probably since its sometimes ignite very slow?

@ruufusdeleon1264 3 года назад

Just spent $270 on a parts/labor for a new contact circuit for the condenser. Next time I know how to do myself.

@sethhorst6158 6 лет назад

I used to have an old rusty one that looks like it could be from 1998-2002 outside the window of my bedroom since my bedroom is halfway into the ground. It's been gone since June/July 2011. In december 2011, the apartment Maintenance replaced some of them with heat pumps and then did the rest of them in probably August/September 2012. Also, isn't a central unit thermostat just a knob with numbers all around it?

@PhunkyPrincess 7 лет назад

Is there a "modulator" in home AC? My parents got a quote to replace it for $600 in So. California. Is that price accurate or are they getting ripped off?

@DC.402 7 лет назад

💘 the video

@andremuganza 6 лет назад

Offical D Clarke ATL you from ATL ?

@DC.402 6 лет назад

The Daily Basic Style yea

@lisaq1712 4 года назад

Question "how does a central AC work " Answer: it works great for those of us that don't have one. Yelling- son go put more water on the swamp cooler its getting f....ing hot In here. Thanks from Texas

@ryanalton3251 10 лет назад

One of the better videos on ac fundamentals. I was looking for a video that was about 15-20 minutes long that was more detailed but this is the longest video I found so far. Its surprising how hard is is to find a good video on the ac process and a good explanation of how the ac works and its fundamental parts. Obviously disappointed that there was no mention of the expansion valve. It would be great if there was a mention of the temperature of the gas/refrigerant at the different parts of the cycle. Keep up the great work, I hope you strive to improve this good video. Thanks!

@repairclinic 10 лет назад

Ryan Alton Thanks for the comment! We are always looking for ways to improve and we appreciate the tips.

@brlinrainf 2 месяца назад

you might want to search the channel "The Engineering Mindset"

@nottarealguy3954 5 лет назад

Was that Uncle John's Band in the intro?

@MrBemnet1 3 года назад

video didn't mention anything about expansion valve.

@destany9591 7 лет назад

I'm waiting on heating and air technitions to come over and look at my central air unit right now. It's not working. The thermostat will turn on but the outside unit doesn't work at all. It's kinda ironic I just had an electrician over to look at out lets that weren't working he checked the whole house made sure the wiring is good. He said the wiring is new and this house was renovated before I moved in. it's an old house but it was totally gutted out and updated with new appliances.

@sumho7532 6 лет назад

Destany it can be a lot of things

@Kay-dx8vm 6 лет назад

I checked both 2 furnaces in my house yesterday and found out there are no air filter in them ( The one in up stare has its air filter left outside with the manual book, the one in crawl space has no air filter). But I can tell that there are 2 gaps were built for air filters. We bought this house 2 years ago and I'm wondering if its ok to run furnaces without airfilters or if not then how the inspection did say anything about it

@trappingisthewayoflife7146 6 лет назад

Son K if their is not one buy the the furnace in the return someone then yes you need one

@ANDRESTARZ90 5 лет назад

My house has this exact model you are demonstrating. The problem with mines is that it's leaking cold air. How do I fix that

@brlinrainf 2 месяца назад

leaking cold air where

@microtechmachineshop 3 года назад

Whos been living their whole life without ac? Woooo fans all the way

@casy6203 3 года назад

And I hate it!

@giladwasheretravel3553 3 года назад

great video. Where are the hot and cold water pipes needed for heating and cooling tho? I didn't notice them.

@Bendigo1 3 года назад

Does not use water.

@brlinrainf 2 месяца назад

sorry did you say *heating*

@repairclinic 11 лет назад

Where are the little holes?

@brlinrainf 2 месяца назад

why are you commenting to your own video? also that is quite funny

@nasreenrahman8267 Год назад

I have an apparent Amana central air unit with the furnace, evaporator coil box and a condenser which is on the rooftop. The air conditioner Stopped cooling very well but it was still working. The repair person came and told me that there is oil leaking from the condenser, while the other person said that there should be no oil in there I'm very confused

@danram247 3 года назад

Question I always wonder the difference between an attic set up or basement a/c heater set up...I have it in the attic...does it use up more energy since the attic is hot in the summer compared to one that is in a basement...

@Bendigo1 3 года назад

Yes. Since hot air rises, the air reaching the unit will be warmer than it would be in the basement. If the return vents are set up right it shouldn't make much difference though

@egg928 3 года назад

Never knew that my gas furnace with ac would be over 240 volts

@MarkusAvrelius Год назад

If I connect a steam humidifier nozzle right above the evaporator coils will it catch any condensated water from the humidifier preventing it getting on furnace's coils?

@adamhvacr6536 4 года назад

0:30 you forgot the drier and expansion valve!

@morgoththekingcodm5990 4 года назад

They also mentioned that the compressor converts the gas into a liquid, which is completely false

@brlinrainf 2 месяца назад

I think drier isn't extremely important

@suhailasaba1051 4 года назад

Great video Question : I have a 1.5ton 220volts split unit AC. After few seconds of turning it on the clamp meter reads 22A then rise to reach 37A for few seconds then it stops and the clamp meter reads zero or 0.1A. What could be the problem?

@brlinrainf 2 месяца назад

do you have inverter technology, it's rare though but if it doesn't, CHECK THE OUTDOOR AND STOP COMPLAINING IF IT STOPPED RUNNING, OF COURSE IT WILL DRAW LESS ELECTRICITY IF IT ISN'T TURNED ON

@6reece 7 лет назад

Hey just wanted to ask a question... the central ac i got is working fine in some parts of the house but my room and living room etc, doesn't seem to be blowing that hard... my house was built brand new in early 2016 so basically a new house... is there any reason for this? I've tried opening some windows for better air flow and stuff but nothing seems to work and my vents are wide open. ty in advance

@brandon9715 7 лет назад

Vendetta Bruh if you are still looking for the solution to this issue, check that the dampers to the vents are not closed off. You can find them in your basement or wherever your ductwork is.

@georgewatt1580 6 лет назад

Or check the ductwork maybe the flex is squished

@pooplhiggs6744 6 лет назад

My first thought, George.

@JPTinioMedia 5 лет назад

opening your windows is a terrible idea, it allows outdoor heat to come into your home. You can close vents in rooms that don't need cooling such as the washroom, closets, or partially close rooms that get good cooling. Up the fan speed on the furnace, most likely requires a technician to do this. If none of that works unfortunately the house was built with a terrible duct design, where the hvac rough in work wasn't connected properly or poorly designed.

@repairclinic 10 лет назад

Oh no! That's no good. What is it leaking and where?

@brlinrainf 2 месяца назад

sorry I think you pressed the wrong button I think you meant to press the reply button and not comment I'm guessing it's cold air leak

@blackhornet3459 3 года назад

You have forgotten add expansion valve process.

@bobmattson8647 2 года назад

I have a Lennox G40UH(X) Furnace that has a bad combustion air inducer. does this Co have one that fits my furnace?

@itai141414 7 лет назад

geat informative video

@skuter7049 10 лет назад

Hello, so, at 11:30pm this Saturday night, my ac decides to give up. No cold air coming out of the vents. Checked the filter, could use replacing, but still wouldn't work with the filter temporarily removed. Went outside to check the fan and it's not moving. Noticed a coating of frost on the line connected to the compressor as well as part of the compressor. Out of curiosity, I checked the air handler in the attic and noticed water collected in the tray (which I don't recall seeing before). Where should I start? Capacitor? This is all new to me. Any help would be greatly appreciated!

@repairclinic 10 лет назад

Both of the fans should be running. If the condenser fan is not running I would check the capacitor first and replace if necessary. You should not be getting frost on the compressor lines unless the air handler fan is not running, not enough air is blowing across the evaporator coil, or there is too much refrigerant. If the inside or outside air temp gets too cold it will also cause frost to form on the larger suction line on the compressor. When the unit is working properly the warm air moving across the evaporator will melt the frost on the coil and it will drip into the pan and go into the condensate drain.

@mjjones2011 7 лет назад

What are some reasons why the compressor won't kick on the unit? What are some things that I should check?

@teamkillmonger445 7 лет назад

Marvin Jones Jr. Check the power to the compressor and your refrigerant. Make sure the wiring of the capacitor and contactor are good for the compressor. Check air filter also. A bad air filter can affect the refrigerant which affects how the compressor works. Is the fan not working also?

@StaXks_Gaming 11 лет назад

that was "COOOL"

@tashamcclure2132 3 года назад

Lmao he's sorta right, but also not

@justassimple8328 3 года назад

Ba dum Tss

@brlinrainf 2 месяца назад

Me playing around with the drums: ba dum dum ba dum tss tss dum

@nathanbirnakamichaeljackso1705 7 лет назад

Can you show me how to replace a furnace and central air conditioner and air handler

@stephensnell1379 2 года назад

You'd require a trained professional to do that

@jmwbird 9 лет назад

My AC unit started acting up this week. It turns on but air is hardly coming through the vents. Brand new filter in it and still the same. Is this a problem with the capacitor on the blower fan? Or does it sound like something else?

@brlinrainf 2 месяца назад

does the fan make a sound if it does like it was normal then check your ducts

@funtimes2497 9 лет назад

Are the fuses the same as house fuses or a different kind of fuse?

@repairclinic 9 лет назад

Fun times They are different, but act similarly.

@mikah4051 4 года назад

Thanks, now I'm really sleepy.

@xianli6488 5 лет назад

So I was wondering, does the blower motor or bottom part of furnace blower, both have affects on the furnace to operate, since when my furnace runs during the Fall/winter it seems to be making an unusual noise, but when the Central AC Runs during Summer , i felt there isn't any unusual noise?

@brlinrainf 2 месяца назад

what sound? you could record and post in your yt channel or maybe just try to imitate the sound in the reply section

@ginabopp4181 7 лет назад

I have a two story townhouse. I have two air vents with filters on the upstairs floor and none on the first floor. I have two intake vents with no filters at one end of the first floor. I am getting plenty of cool air blowing on the second floor but hardly anything on the first floor. I was told by the serviceman that my ductwork is beautifu but the design is not. He is suggesting that I put in a ductless unit for downstairs. Does this seem correct.