Very conveniently laid out and accessible in this Subaru. My vehicle......every thing stashed where some dissembly is required to access any part.

Interestingly, what interested me in learning the AC system in cars is Rainman Ray’s work with fixing broken car ACs. Now with your video, it is one more knowledge received in how to potentially service my Subaru’s AC if it needs one. Very easy to understand. Thanks for the video.

Excellent articulation. However, the geeky proper terms are: evaporators "absorb" the heat & condensers "reject" heat. Nonetheless, absolutely well explained.. Next time, please cover high & low pressure safety switches & the crappy evaporator thermistor that is problematic in most every older subaru! Maybe show how ohms go up & down with a meter depending on exposure to different Temps & how it shuts off the a/c clutch. Thanks again.

Thanks. Enjoyed the refresher. Back in the "old days" my dad and I would service our own a/c's. Very crude to what's done today. When my dad passed away a few years ago and we were cleaning out his garage and found several cans of unused R12. Yep, that was a while back! (1970s and 80's) Not sure why he hung on to it because by then, things had moved on to R134a. Don't think he had any car new enough to get to the newest/R-1234yf or whatever it is now. Haven't really kept up. I think my 2019 STI and 2016 Crosstrek are still the 134.

I'm glad you explained the "heat pump " Robert! A lot of people don't understand it!

I repaired the a/c system in my old outback. And in my antique Chevy convertible. So easy. The a/c shops quotes were nuts.

Good stuff as always, Mr. Subaru. If time permits, you can go deeper still into the theory. As in why do we need the refrigerant to change states why it needs to enter the TXV as a high pressure liquid, etc. I remember learning about HVAC back in the day COULD NOT wrap my head around how a closed circuit "absorbs" heat. 😅 As ever, this video was good and I look forward to your new content.

would love to see a video on replacing a condenser on older Subaru's if you haven't already made one. love your videos and have learned a lot from them helping me with my 2010 Forester

Oh man, this is SO helpful! Thank you!

Very elaborate and meticulous explanations on top of that, very accurate, thanks for your video

Hi, I’m having trouble with my 2007 Subaru Forester and while trying to troubleshoot the problem I came across your channel. I have never worked on automotive AC before but giving how expensive the repair can turn out to be I’m willing to give a DIY repair a try. The problem I’m having is that the AC system is not sending cool air into the passenger compartment and I noticed the clutch in the compressor is not engaging. I checked the AC relay inside the fuse box in the engine compartment and it’s ok. That is pretty much all I’ve done so far, I did it by swapping the AC relay with another one just like it within the fuse box. The rest I have done is just watching videos. For what I have seen I know I have to get a multimeter to check the AC pressure switch to see if it’s closed for continuity. For what I’ve seen these switches open when they sense higher pressure than normal inside the high pressure line or lower pressure than normal inside the low pressure line. Do you know if my Subaru has these two switches by chance? Can you help me find this switch? Also I need to see if the compressor is getting any voltage but I’m assuming it does as the AC relay is working properly. Summer is around the corner and I need to fix this asap. I hope you can guide me through the process and keep up the good videos 👍

Frickin' awesome! I NEEDED that level of explanation that it seems mechanics don't want or know properly "how" to explain what you so thoroughly did! Now, I can more confidently replace all the parts mentioned. I have the orifice tube and accumulator setup in my 1999 Ford Mustang GT. The discharge hose has a small canister on it. When I asked ChatGPT, it said it's the pressure relief valve, but I see no hole to release any pressure. Though, it would be environmentally detrimental to release refrigerant, so maybe, somehow, it releases excess pressure internally somehow, without actually "releasing" it into the environment. I guess that's why it's called "relief" rather than "release" valve? Maybe I answered my own question, ha! Again, thanks for the perfect explanation. Like you said, understanding the basis of how the AC system operates goes a long way in aiding in any troubleshooting one may need to go through!

You are awesome thank you thank you for making this video👍🏻

IM A RESIDENTIAL HVAC TECH AND WATCHING THIS VID TO TROUBLESHOOT MY CAR'S AC😂😂😂

Thanks. I did learn some information on this.

Very helpful knowledge. Thank you!

Just failed my ac ase bu 2 questions, and i come to find this video😕 great video 👍🏽

It does not dump heat onto the condenser!! The condenser removes heat from the high pressure and high temperature gas refrigerant after the compressor has done its job. The condenser turns refrigerant gas to a liquid throught heat removal at the High pressure side

Good explanation!

Could you show us how access and check the a/c drainage to see if it us clogged. And also how to access the evaporator to clean it. Thank you. I have 14 years a Subaru. How on earth I missed your great channel?

Great job again

Thanks for the explanation!

Do you have a video that explains, locates, and diagnoses the pressure switches for the ej25 ac system? I'm looking all over and can't find a single video that even talks about them.

Wow, amazing explanation

Watching this while using the A/C on my impreza

Is there a way to test the compressor off the vehicle to see if it has a fault? The a/c on my SH Forester stopped working and i want to know if it's the compressor or something else.

Good video, question if i install a bigger compressor will it help with cooling?

“Pulls heat out of the car.” With that, is the most effective way to cool the cab to use the button that circulates the air inside the cab?

Clear explanation ! Thanks!

I need your expertise MrSubaru. I have 04 forester XT, it has been acting up lately. The car won't start as if the battery is dead, the battery is new 2022, it would start when boosting and won't die after a drive so the alternator is good, starter is good, ignition is good. I check around the battery 2 weeks ago when it that the negative terminal was loose, I fixed that all is tight and secure. Now the problem is happening again, same thing boosting will start the car and would remain running, I assume I may have ground problem, there is power, but sometimes won't start, I had it happen today, but by noon it start without boosting. Any thoughts? Or if my assumption of the ground is correct. 12 volt reading alternator and 14 when running, battery is the same 12 volt reading. Getting good connection on ground tho is tricky.

Excellent instruction.👍

Both my 14 and 16 Imprezas have no A/C this summer. Kinda crazy, 70k and 52k miles and no a/c. I'm super disappointed in Subaru quality.

Simple - works same as a refrigerator .. with very few changes

Mr subaru. what would cause my outback xt to stall at idle when using a/c. also doesn't idle smoothly when it's 80+ degrees outside

Nice explanation, thank you

Good, good! I think I've got it!!😆

I've got both... Subaru forester and a duramax like yours you displayed. I'm surprised the air drier accumulator is post evaporator, as I thought the accumulator needed to be in between the condensor and the evaporator... Apparently not so on our chevy Silverados. That was my question to see if it's backwards, but Apparently it doesn't matter what position it's in, so long as it in the system before the compressor. Correct?

OK, but where does the NONrecirulating air come from? My dad says from the bottom of the windshield, under the top of the hood. 🤔

So if my ac is blowing hot, could it be my evaporator not working right? I've checked the refrigerate and it's good. It's just blowing cool on the passenger side and hot on the driver side.

I want to know what the pressure gauges I bought should read. Aka.... how to use them.

Robert, it be cool if you cracked open a subaru compressors!

Hello sir , do you have any wiring diagram from ac compresor to outside fuse box , go to under dash fuse box then go to off on ac swith in the middle of the dash . Thank you for your response 🫡🙏🙌🫵🫶

My 2017 A/C just stopped blowing cold. 😢 This helps. Cluth not engaging when AC turned on... down the 🐇 hole I go.

Great video!!! Do you have a playlist with the other, more in depth videos?

Ok. When we need to replace the drier on the condenser at the right side, once we change it do we need to add any oil? How we add oil if we don't disconnect it? we just remove from the bottom and then install the new one, but how to add the oil in it? We have to remove the stupid condenser in order to add any oil?

High side line o-ring seepage at compressor

My car's A/C properly charged by mechanic is intermittent. Mechanic is going to do more diagnostics. Does my 2005 LL Bean H6 outback have a computer circuit that tells a relay to provide power to the electromagnetic clutch? Thanks in advance

I keep having issues with AC in my Audi A3. Everything works fine until car's left in a very hot spot. AC won't turn on then - it just blows back a hot air (hotter than the air i get when AC is off). I did service it twice already - first they've replace the condenser and some filters. It didn't help. Then they replaced some temperature sensor (interior one, as they said there are two). I though that fixed since the AC was running fine for a while. Now I left it on a sun and the temparatures were rather high and the AC stopped working again. I don't know if the service is unproffessional or it's a very strange case that's hard to diagnose/replicate...

Dear I have an AC sensor evaporator problem. What would happen if I put a 10k resistor in place of the sensor? My Hyundai is a compressor without a clutch

Great video 👍

When you understand thermodynamics, AC systems are just ridiculously cool (heh). You're making slow stuff go slower by making the fast stuff go faster through squeezing and stretching the stuff in the middle.

Hello dear, please correct me, or any one else, if we increase the size or the volume of the condenser then this lead to make the car A/C cooler?? Is this good idea?

We suffer here in hot countries, in summer the ac does not cool efficiently. Im reading about insulating car ac pipes . Can you make or test if this works or does it go against car ac working principles.

Hi Mr Subaru my AC is blowing warm air and then blowing cold after a certain time is that normal? Am I low or refrigant?

Good job 👍👍

Ty teacher. Sifu.

how funny, i was looking to fix a problem with my crosstrek. It lags in acceleration when pushing the pedal from a stop while using the AC. After a few seconds it picks up again. It only happens when coming to a full stop and then accelerating. Its bugging me so much because it looks like my crosstrek is having transmission problems.

Does anyone know if I salvaged an aircon system from a Peugeot can I retrofit to another car?

Thanks

good stuff

My AC only works for a few minutes , I hooked up gauges and when I rev my engine the low side drops to almost zero and this cause the compressor to shut off, then I have to wait a few hours before the compressor will go back on, any ideas?

years ago I learned from an HVAC tech that cold air isn't simply cold, it's air with a complete lack of heat

You can upsell a brake flush

Some small airplanes have the same system as a vehicle

now my question is: what could cause a car to start overheating with the ac on when city driving or at idle? i've been chasing this issue for a week or two now i just don't know what it could be.

Great video since my 14 Forester looks exactly like this. My AC runs cold for about 10 minutes and then goes warm. The compressor and clutch seem to be working from what I could see. I checked the pressure with the recharge kit and it said it was fine, so I didn't use it. Any idea of what the problem could be?

Thanks ❤

So I get that it’s a heat pump. I’m not sure I understand the misconception about air being cooled though. Isn’t any scenario where air is getting cooler having its heat absorbed by the surrounding environment? Meaning, it’s just a different word to describe the same process.

It’s a good thing you are a Mechanic and not a Teacher

The 2019 should be 1234yf but the 2016 is probably 134a

Hey MrSubaru, ppl are tagging you on my matco balljoint press video. How about unblocking me and do your thing? 😃

Drunk cam

have you did a more advanced video, i would love to see it. for a basic video it was fantastic so many utubers are butchering compressors because of their lack of knowledge and its just a viscous cycle. i learned from tom lech, love2hvac, hvac school. they no how to do ac.,best teachers out thier ,check them out ,they changed my way of doing ac 100 percent

If you look at the life cycle of refrigerant it aligns perfectly with DuPont's patents. R12 was the best refrigerant.....but the Dupont patent was about to expire so we had to say it "hurt" the ozone.....so I came R135a which isn't as efficient but we were told it protected the Ozone but when the R124a patent was about to expire R134A was discovered to "hurt" the environment so we magically got R1234yf which as of now doesn't hurt the environment but in another 25 years from 2017 it will ....oh and R1234yf is combustible......yes your refrigerant post 2017 is combustible so be careful.......but the best most effective refrigerant is R12...... Dupont has some very effective lobbyists in Washington!

Thanks 🙏 🙏 well explained