A/C System Failure Diagnosis: Poor Cooling at Idle
ฝัง
- เผยแพร่เมื่อ 27 พ.ค. 2024
- BSG Automotive offers Auto Repair services in the greater Chicagoland area.
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www.bsgautomotive.com
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/ bsgautomotive
Disclaimer:
The information, demonstration and any content contained in this video is for informational purposes only. The user and BSG Automotive (hereinafter “BSG Automotive”) makes no warranty, express or implied, regarding the effectiveness or safety of the contents of this video. In no way should the contents of the video, including the tools used, be repeated or tried by anyone. Viewers should only seek the help of a trained professional located at a licensed auto repair shop for any fix, modification, alteration, or any change to their vehicle. BSG Automotive shall not be liable for any injury, damage, or loss to any person or property that may result from use of the tools, equipment, or any content contained in this video. In addition, there is no way to guarantee that the video is not altered or modified or is not in the final form submitted by BSG Automotive and therefore, BSG Automotive does not warrant that the video is unaltered or not modified. The links on this video to products are for informational purposes only and in no way are an endorsement of the safety or effectiveness of the particular product. Viewers understand that anything contained in this video or linked to or from this video is the sole responsibility of the viewer and in no way provides an express or implied warranty as to the safety or effectiveness of any linked tool, product, or video. Therefore, viewer agrees to release, waive, and discharge BSG Automotive or anyone affiliated with BSG Automotive, from any and all liability, claims, demands, actions, and causes of action whatsoever arising out of or related to any loss, damage, or injury, including death, that may be sustained by the viewer, or to any property belonging to viewer, regardless of whether the loss is linked to the use of the contents of this video, or otherwise and regardless of whether such liability arises in tort, contract, strict liability, or otherwise, to the fullest extent allowed by law. - ยานยนต์และพาหนะ
Brian came a long way and really knows his trade! I’m Very Proud of His Accomplishments. Your Old Neighbor in OL.
sorry to be so offtopic but does someone know a way to log back into an instagram account?
I was stupid forgot my password. I would appreciate any tips you can give me.
@@ezragavin2522 Putz
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.
So if a good amount of water is leaking under the vehicle and stops when you turn off the AC...what could it be. Refrigerant is good. AC compressor is turning on and off. I'm thinking control valve right?
@@doityourself2save The water is condensation running out the evaporator drain hose.
@@richard1835 very much so. but its a lot (like a river). just wondering if its a leakage or control valves.
@@doityourself2save Check your engine coolant also. Your heater core may be leaking. In the hot and humid summer evaporator cores can produce a lot of condensation.
@@doityourself2save You have to find the location of the leak or water and go from there. You should be able to smell a coolant leak as opposed to the AC condensation release.
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.
spot on nice to see an honest man doing a first class job greeting from a welshman working in london.
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.
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.
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!
How did it go?
Yo. How'd your ac work out?
I actually had to replace my faulty compressor and pretty much start from scratch.
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!!
Love this guy he is such a honest mechanic.
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.
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@@nickynuts8013 yes could you translate that please lol 🤣🤣🤣🤣
Sometimes, it is best to just replace the condenser. This is particularly true on old cars, where half the fins may be bent and blocked.
@@matthewstorm5188I don’t know anywhere enough about this stuff but I have the nose off the front of my Jeep and that thing looks like it lost a really bad rock fight!
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.
wolf2351 you can’t trust mechanics anymore, the world is so fucked anymore and you can’t trust or believe anyone. I told my Dad his mechanic was robbing him. For years I kept telling him, but he was like naaaa, he wouldn’t do that he’s a good guy, bla bla bla. Then he went to get a noise looked at and they said he had to replace his axles and power steering pump, 1200.00. But eventually dad found out when he noticed his power steering pump wasn’t changed and I got to say I told ya so. I’m sure he didn’t need, or get new axles either. Fix it yourself people, it’s not hard unless you lack time like a lot of us. Nobody wants to spend your day off working on a car, but it’s better than giving a mechanic a whole paycheck to fix something simple.
My dad used to tell ME the mechanic thing you need patience.
Never trust the stealership I mean dealership, always get 2nd opinion
I don't believe that for 1 second..
The cycling switch is the very first thing to check after verifying that it has Freon.
Did you ask for an explanation of what exactly they found.
Please post technicians comments on repair order
Nice
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!
Excellent presentation! Kept wanting to skip ahead but couldn't because every word was worth listening to. Cheers!
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.
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!
Was your Altima the S or no. I’m having the same problem but I have a 2015 Altima S with 2.5L but it don’t have that control valve on it
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
ac compressor clutch not working all Elantra ac not cooling
Which company making Hyundai in Korea pls slove ac proplem SPL on Elantra
Excellent video have not seen any one else explain the refrigerant control valve .Thanks
Great info in this video! Thanks man, you clearly are way more clued up that the average AC tech.
Thank you so much for posted compressor electronic valve problem
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 TH-cam. I have become my own mechanic because of you. 😁I just replaced by spark pugs and a spark pug terminal made possible by watching TH-cam videos. 🙏🏽🙏🏽🙏🏽
Did the valve work for you?
@@phillippardo5712 i just had it delivered and need time to install it.
@@ricardooconnor2362 I have one on the way. Perhaps I'll check back in after I install and let you know how it goes. It would be nice if maybe you can do the same! Thanks.
I just replaced my compressor myself because i had the same problem. It definitely fixed my problem.
Excellent, worthwhile, well done technical video! Very educational and enjoyable to watch.
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.
HIgh Desert?
WOW! Finally we're shown the way it's done! Liked, subscribed & activated notifications. Godspeed!
David G. Washington State
Ultra informative and well put together!
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
Did you have to evacuate the system?
Thank you Brian. Good job. I appreciate your videos. Have a good day.
Educating video in very simple form. Well done man.
Thank you for making these videos Brian keep up the good work!!!!!!
Thank You for showing me this.
Well, here it is two years after you posted this video and my wife's 2015 Nissan Altima is doing exactly what is happening in this video with very similar readings. I'm doing this job now however, (like you said) a bit hard to find the replacement part. I think NAPA may have it. Lots of people have complained about AC compressor failure's on these Nissans. I'm guessing its this little part like in your video that may be at fault however, Dealerships and repair shops just see an opportunity to swap out entire systems and make a little more off folks. I find it a little odd that this fails and the car is only 5 years old with about 60k miles meanwhile, we have a 12 year old Hyundai Entourage with just under 200k miles and it's AC system is still original and going strong. Anyways, thanks for the video.
Edit follow up 8/5/2020: It was the control valve for our 2015 Nissan Altima SV. NAPA did not have the part like I thought. AutoZone said they could order one for about 85-90 dollars, (part number MT3452 ) from Santech. This part only fits 2013 through 2017 2.5L Altima SV & SL models only. I found one on ebay by typing in the part number for 26.00 dollars and free shipping. Took a chance and it seems to be working for now. Not sure how long it will last as the part is made in China. If it get us through the remainder of the summer I'll be happy as it's better than replacing the whole compressor. Good luck to anyone dealing with this.
Any updates?
@@MigDw311 Yeah, it was that little part like in the video. AutoZone has the part you can order for like 80-100 dollars. I found one on ebay for cheaper and its working good now. If you're having this issue too I wish you much luck. This video save me a good chunk of money. I didnt even have to remove the compressor from the car. Was able to access it from under the car. If you need the part it's: part number MT3452 from Santech. This part only fits 2013 through 2017 2.5L Altima SV & SL models only.
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)
I have the same issue and same readings on the same car as well. Did you figure out what ultimately fixed your vehicle? I've already replaced this valve, but I still have the same problem. I'm thinking since he ended up changing the whole compressor, that maybe it was a bad compressor to begin with. Did you end up having to change yours? Or just the things you mentioned? Thanks!!
Dylan Parker I changed the expansion valve first but that didn’t solve the issue. I replaced the condenser as well but still the same. Only after replacing this valve, the reading improved and the air was ice cold
@@jameslouis4309 Thank you for the reply! I still feel like this is my issue. But I don't know how to test the replacement control valve I bought on eBay. Maybe my replacement doesn't work either..
Dylan Parker I agree. I couldn’t test the old one either. Usually you can hit it with 12v and hear a click but not with these. I just installed the new one and hoped for the best and thankfully, that was it.
@@dylanparker2525 weak compressor most likely
Because I have learned a lot from guys like this on TH-cam I did an AC on a big rig, thanks AC guys of TH-cam!
Excellent video. Thank you
Nice job. Good information. Thank you for sharing.
Very nice job, thanks for the help from "Chi-Town"
wow you did a realy good job explaining thanks
Great diagnostic info, replacing this valve myself saved me lots of money, Thanks!!
Great breakdown. I now know what that valve does. Thank you.
Well done Brian!
Very good and understandable troubleshooting. Thanks
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)
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?
Thank you for the knowledge.
New to the channel and wanted to comment on what a great video this is! Great job and keep up the good work!
Man thank you so much! This video was a huge help! Keep up the good work.
Great Explanation on how to test the expansion valve!!!
That is a great explanation. Thanks a lot!
Great. Tanks for the perfect explanation.
Nice job , very informative thank you.
Very informative diagnosis. I like ac videos.
Nice... Very thorough...Thank You for Sharing...
I love using our minds and our knowledge. Great diag video
Dude!!!! Almost clicked off but decided to hear you out a little more-GLAD I DID!! Seems you know your stuff!!! Awesome Job!!😁👍👍
Thank you so much bro. I bought the switch for 40 bucks off ebay and saved hundreds👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻
Great video!!! Thank You
Great video brother!!
Great vlog bro!
Great video
Great informational video, thankyou for sharing. 👌🏻👏🏻👏🏻 🖐 🇦🇺
Nice vid amigo. Very informative learned tones. Thanks for sharing
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
I'm pretty sure if it's clogged issue the high pressure reading side is much higher than normal.
its great knowing you follow my comments, cheers,
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!
Excellent very clear explanation keep it up please.
very informative! thanks. i think i may have this issue on my 05 tacoma xrunner
I learn so much from TH-cam videos like this. My wife calls me a TH-cam Master Mechanic LOL
Great video man love doing this kinda stuff. You can work on anything as long as you understand the basics
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.
interesting.
Where does system leaks most: compressor shaft, shredder valves, condenser fittings??
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.
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...
Did you figure that out?
Hey man ! Nice job. I like the way you think. Use your head before your hands. Thank you for your videos.
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.
actually on my 2014 altima the valve is easily accessible from the bottom, no need to remove compressor.
That's because of txv and r134 runs at a high head pressure. Fixed orfice with r12a is the way to go imo
Good Job!
Do you have any videos on AC clutches going bad and what the effects are? Excellent content and its much appreciated.
Awesome job well done
Best AC video I’ve seen on TH-cam so far!
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.
Just wanna say thank you ! I have not seen a on-line Ford Tech-Mech I'd trust better. Thank you !
The solenoids for the AC compressors are widely available online...
often the auto mechanists etc would ‘recommend’ complete replacement of New compressor.
It’s easier job and higher value, esp service Dept that has profit objective to attain.
Had to get one shipped from the US, overseas. Can't find them anywhere where i am, except pulled out of an old and likely seriously abused junkyard AC compressor.
I asked a workshop nearby to diagnose my AC system because it was weak at Idle but they said all they can do is refill system first and then diagnose. Refill didn't do anything and then they said it is going to be very expensive to repair because AC system does not give any fault codes so they recommend to have AC flush and then replace nearly every AC component.
Then i came to TH-cam learning some AC diagnostics myself and it turned out that i had only faulty solenoid valve.
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.
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?
Great video thank you so much Mark mangano dependable auto wartburg tennessee outstanding
Thank you !
Awesome vid
Thank you.
Awesome learned alot ....good job
Hi, good vids! What should pressures be on a 2015 suburban with rear a/c? Thanks
had a Saturn Vue 2007 run cold down the interstate but hot sitting in traffic. replaced the scroll valve pulled a vaccum and refill the unit and it's still cooling after three years.
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.
Awesome Job! Thanks you really helped me out!
SUBSTANTIAL FordTechMakuloco
Tutorial brilliant video amazing footage 👏 thank you FordTechMakuloco
From Nick Ayivor from London England UK 🇬🇧
nice job
Thank you for the great video. My car AC system very similar to your case except when the engine is off. It reads 105 at low side and 58 at high side. It does not go equilibrium. Possible clogged at somewhere? I removed desiccant bag that is very dark color. Would it be the cause? When engine running and AC on, low side 48, high side 98, similar to your reading, also knocking noise. Could it be electronic control valve? Thanks in advance.
I like how u say take the bad stuff out put some good stuff in 👍
Excellent.
I'm having the same problem. With over 5 thousand dollars spent in 2019 and 2020 on this 2011 Mazda Cx-7 and still I'm at 80 degrees at an idle. My main problem is just finding an honest mechanic.
nice video bro
My 05 Expedition started doing that recently but, not all the time. Also, I get no air coming out of the second row vents but it blows hard out of the third row seating vents.