Brian came a long way and really knows his trade! I’m Very Proud of His Accomplishments. Your Old Neighbor in OL.

I am a "Mobile" Mechanic that does alot of Mobile A/C work (Refrigerant Recovery also), and your A/C diagnostic videos are right on. You know what you are doing. Thank you. Thumbs Up.

spot on nice to see an honest man doing a first class job greeting from a welshman working in london.

Awesome guy!! I have learned more from you in these 16 minutes than I have learned all my life about air conditioning. Keep up the great work!!

I was a tech before these newer compressors (80's) and had to learn about them after my Hyundai Tuscon had a cooling issue with high low side pressures. I chased it until I found these type of vids. Replaced the valve and it brought the pressure back to normal and cooling was back to normal 46 degrees after being stuck at 60 prior. Thanks to you for doing these!!!! Saved me a ton of money doing it all myself.

Great info in this video! Thanks man, you clearly are way more clued up that the average AC tech.

Love this guy he is such a honest mechanic.

The car provided a perfect case for your video. You provided the perfect explanation and repair and I learned about a control valve in the compressor. Nice job.

Thanks Brian. Your reasoning behind the troubleshooting process is impeccable. I appreciate your thorough feedback on what you're looking at, it really helps people viewing your videos.

WOW! Finally we're shown the way it's done! Liked, subscribed & activated notifications. Godspeed! David G. Washington State

Great video. Thanks "mekuloco" for that regulator valve function description on the low side and the reason why the expansion valve should not be suspected as being faulty.

Excellent presentation! Kept wanting to skip ahead but couldn't because every word was worth listening to. Cheers!

Thank you Brian. Good job. I appreciate your videos. Have a good day.

Excellent video have not seen any one else explain the refrigerant control valve .Thanks

Excellent, worthwhile, well done technical video! Very educational and enjoyable to watch.

Ultra informative and well put together!

Thank you so much for posted compressor electronic valve problem

Thank you for making these videos Brian keep up the good work!!!!!!

Educating video in very simple form. Well done man.

Thank You for showing me this.

I'm impressed by your clean shop. I can't stand a dirty, greasy auto shop as most of them are. Great video! I'm a commercial HVAC tech and this exact problem on my 2015 Altima had me scratching my head. I evacuated the system and put a measured charge back in and no change. My gauge readings are exactly the same as yours! Thanks!

I just replaced my compressor myself because i had the same problem. It definitely fixed my problem.

That makes a lot of sense. I can picture it in my head now. Very interesting and effective diagnosis method The compressor's inability to "pump" refrigerant from the suction side causes a backup that increases the pressure, and impedes the condenser from releasing the heat; High suction pressure, poor cooling, voila! Brilliant, live and learn!

wow you did a realy good job explaining thanks

Excellent video. Thank you

Nice job. Good information. Thank you for sharing.

This was very educational. I have a 2013 Peterbuilt a/c works great while I'm driving but at idle it warms up and doesn't cool. I've done a lot of research and watching these videos, I am convinced it needs to go in the shop. Ty

Very nice job, thanks for the help from "Chi-Town"

Because I have learned a lot from guys like this on KZfaq I did an AC on a big rig, thanks AC guys of KZfaq!

I had a ford escort that the dealer wanted to charge me 1300 dollars to fix. I said no and took the car home. The dealer said i needed a whole new ac system. I started troubleshooting the problem myself and all i needed was a cycling pressure switch for 18 dollars from Napa. I fixed myself and i was happy as hell.

Very good and understandable troubleshooting. Thanks

Man thank you so much! This video was a huge help! Keep up the good work.

Great diagnostic info, replacing this valve myself saved me lots of money, Thanks!!

Thank you for the knowledge.

Great breakdown. I now know what that valve does. Thank you.

very informative! thanks. i think i may have this issue on my 05 tacoma xrunner

Well done Brian!

Great. Tanks for the perfect explanation.

That is a great explanation. Thanks a lot!

Nice... Very thorough...Thank You for Sharing...

Nice job , very informative thank you.

Very informative diagnosis. I like ac videos.

New to the channel and wanted to comment on what a great video this is! Great job and keep up the good work!

I learn so much from KZfaq videos like this. My wife calls me a KZfaq Master Mechanic LOL

Thank you so much bro. I bought the switch for 40 bucks off ebay and saved hundreds👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻

Holy crap , this video might actually be the one to save me from going insane! My pressures are 70/145 with 95 ambient temp. I’m going to replace that valve asap. Thank you!

Another visual check is to see how clean the condenser is. I just did one that was almost completely plugged with bugs dirt dust cotton etc. I actually pulled the radiator out (didn't want to crack the AC unless absolutely necessary) so I could thoroughly clean all fins on both. Starting pressure 30/270 @80°. When cleaning was done it was 37/175@ 77° blowing a nice 42° in the cabin now. If I hadn't thought to check and clean it, I would have done a orifice, dryer, and flush, and I doubt it would have fixed anything.

Wow, exactly the thing I'm looking for! I suppose this is my issue now, when at idle the cooling is not as good as when I rev the engine. But when I rev the engine, the pressure on the low side is at 50, 52 which is way too high, while on the high side is at 200, 210. (mine is BMW E90)

I have been doing a/c work in mojave desert over 45 years, and you are very correct and a great a c tech. Keep current and trained and you will have a great career and profits. Thanks I couldn't have explained it better. THE sweet spot on low a c pressure I usually explain to them a low side preferred pressure range around 25 to 45 p s i. Running.

Thank you ,for all these precious infoes, I have an Avalon 2013 that I took to the dealer they did not know the problem they said the system is clogged somewhere,,,ha ha ha like the sewer ???? I am away from home now but I am pretty sure it is the pressure control valve.thank you again

its great knowing you follow my comments, cheers,

Great video!!! Thank You

I love using our minds and our knowledge. Great diag video

Hey man ! Nice job. I like the way you think. Use your head before your hands. Thank you for your videos.

Great Explanation on how to test the expansion valve!!!

Great informational video, thankyou for sharing. 👌🏻👏🏻👏🏻 🖐 🇦🇺

Nice vid amigo. Very informative learned tones. Thanks for sharing

Excellent very clear explanation keep it up please.

Dude!!!! Almost clicked off but decided to hear you out a little more-GLAD I DID!! Seems you know your stuff!!! Awesome Job!!😁👍👍

Great video man love doing this kinda stuff. You can work on anything as long as you understand the basics

Great video

Thank you.

VERY NICE WELL DONE VIDEO! I have rebuilt 3 or 4 automotive AC systems. One of them had a plugged orifice . Have retrofitted r12 over to r134a. With excellent results. Leaks are a problem. If you have a leak in a retrofitted r12 system the leak will be worse,with r134a because of the molecular structure of the refrigerant r134a.

Great video thank you so much Mark mangano dependable auto wartburg tennessee outstanding

Good Job!

Just wanna say thank you ! I have not seen a on-line Ford Tech-Mech I'd trust better. Thank you !

Great video brother!!

Awesome job well done

Best AC video I’ve seen on KZfaq so far!

Amazing!!! I was just about to fork out $1200, $1500 to get my wife’s 2014 Altima AC fixed. it’s experiencing the same diagnostic issue in this video and I have no doubt it is the refrigerator control valve which I will be fixing. Thank you so much for this video. Thank God for KZfaq. I have become my own mechanic because of you. 😁I just replaced by spark pugs and a spark pug terminal made possible by watching KZfaq videos. 🙏🏽🙏🏽🙏🏽

Great vlog bro!

Nice of Nissan to make getting to the a/c pressure control valve so easily. lol. I have been noticing a/c failure in many different types of 'newer' cars less than 5 years old compared to older vehicles.

2000 Jeep Cherokee... Will not Take Freon... Compressor worked great in the other jeep 96 cherokee country both 4.o but i had to change out the backs because they were in different positions. 96 back of 2000 top of comp. I had it vac. and put ruffly 4 oz oil that it took no problem. wont take freon. i know its pumping for sure because i took off the low side sensor held down the valve with the clutched manually kicked in with trying to put freon in it and it blew off one of the lines going into the condencer. So ya its building up pressure but not sure on the suction part. as far as the power/fuses etc. I start the car turn on A/C controls, Hi/max, with a test light i have pwer on both wires coming from the compressor . the ground on the comp. shows to be hot too. Both incerts show hot on the low pressure switch /cycling switch unless i unhook the high side switch. then one side hot no light on the other insert.Then i try to bridge it over and it still dont kick the clutch in. If i try that with it showing 2 hots it blows the big 20 amp fuse. Same if i try to bridge it over from the ac relay on the fuse box. the fan shows 2 hot coming out of the switch going to the fan but 1 hot 1 ground going in the plug. When I unplug the ac compressor i still have power on the compressor end/plug and both wires but no power on the plug wire coming from the wiring harness. Even with everything unhooked. low side high side fan and ac compressor i still have power on the compressor. both wires... Only time the wire from the harness has powe is when i plug in the ac. Is that right?? My low pressure switch 4 ports has power on 3 out of 4 ports/slots. Car running ac controls on, if i unplug my low side sensor i then have a hot and ground on the high side switch instead of 2 hots but low side switch has 3 hot 1 neg. unplugged... i did test the wire thats going into that port and it has power going in the switch but no power in the port of the switch. If i hook the high side back up, again i got 2 hot ports on the low pressure switch. Even when i have 1 hot side other neg with the high side unplugged = it still wont cycle the clutch but it dont blow the fuse then. Do i have a ground somewhere maybe causing it not to let it take freon??? P need help caus i cant afford to take it to a shop...

thanks for share

I have a 2010 Fusion sport with a similar problem. Insufficient A/C when it's 30+ degrees C outside and the engine is at idle. As far as I know, the system is fully charged. I'll ask Ford to check this. Thanks for a great video!

nice job

SUBSTANTIAL FordTechMakuloco Tutorial brilliant video amazing footage 👏 thank you FordTechMakuloco From Nick Ayivor from London England UK 🇬🇧

Great video. I have the exact same car with the exact same issue, exact same manifold gauge readings (high side normal low side too high) and exact same temp blowing out the vents, lol. I wish I saw this video before I replaced the TXV, the condenser, flushed out the evap, checked both cooling fan operation etc. I did everything but replace the compressor and control valve. Most people just look for a click out of the compressor and think it's not the issue. This shows that even if the compressor clicks on, it could still be at fault (Compressor control valve in this case)

Thank you !

Thanks

Great knowledge and great video - thanks 👍

NOTE This fix worked on my 2014 Altima but you do NOT need to remove the ac to replace the RCV solenoid. It is clearly accessible from under the car I just put the altima on mini ramps and its right there. Got the part form ebay for $40. Thanks for your helpful video

Excellent.

Awesome Job! Thanks you really helped me out!

this is s great video, very comprehensive and well explained. I have a question: would all this apply to a semi truck's AC which is not cold when idling. thank you.

Awesome vid

That’s exactly whats happening to my 2013 FORD EXPLORER. I wish you were in phoenix arizona lol i would take it to you. You know what youre doing. I took it to a mechanic and he just charged me to vacuum the system and recharge it and its still not that cold.

13:30 I'm glad you made this distinction clear. the electronic valves like this one are lesser known and studied by most. also doesn't the valve close when it's off and sensing no heat? like a mechanical valve it would close when powers off so why do the pressures equalize?

Awesome learned alot ....good job

my dealer told me I needed a new compressor, but I found the a/c compressor control valve online for $16.99. Very easy change out on Nissan Altima's and Sentra's.

You need a big shop fan to cool yourself and blow the exhaust fumes out if you don't have one. Thanks for the gauge reading and pressure read out determination. Plus other info... I have heard the low side line should get cold with the engine and ac cool on.

Tq. Well explained. 👍👍

Just an fyi. I've replaced the refrigerant control valve w/o removing the compressor and that fixed it! It took me about 1.5 hrs to replaces it though (mainly because it was a pain to remove the retention ring due to limit space) but it worked.

Do you have any videos on AC clutches going bad and what the effects are? Excellent content and its much appreciated.

very helpful video. thz Bros

Very Imformative. TU

Thanks for the accurate assessment determining TXV and control valve. My 2014 Corolla A/C has cold air when driving then at a stop it turns to hot air 10-15 minutes later cold again, do you think this is the control valve on the compressor causing the problem?

Very good information. It used a valve separate from the exp valve. I would replace the compressor and receiver/dryer. Oil and charge the system. Should pull 40 degrees out the registers. And DRY air. Pretty humid in Chicago.

Awesome Video :)

Thnx for the video my sisters car has the sane exact problem im gonna try and find the sensor if not ill change the compressor and its a nissan sentra 2014