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How to Diagnose and Recharge Your AC System with Refrigerant - Using an A/C Manifold Gauge Set 

Ratchets And Wrenches
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In this video I will show you how you can use an air conditioning (A/C) manifold gauge set to both diagnose problems and add refrigerant to your car's ac system. We will go over some different pressure readings you could have for the low and high pressure sides of the ac system, what could cause those and than onto a step by step procedure on adding a refrigerant to your car's ac system.
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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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9 май 2016

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Комментарии : 297   
@Javainthebox
@Javainthebox 2 года назад
Great video! I would add (my apologies if I missed you covering this) that you need to purge the air from the yellow line after you connect the can of refrigerant and before you open the low side valve to start sucking the new refrigerant in. This will keep moisture/air out of your system.
@maddogpham9815
@maddogpham9815 Год назад
Exactly! Same goes with the LP and HP connection, he missed to purge those air trap in the hose lines before open both L and H gauges, especially the L side. In this case, he had air trap in the LP blue hose and the yellow line. Other than that, great video!
@zofa300
@zofa300 Год назад
Why he did not purge the blue or red lines once he connect them to prevent air? any idea? thx
@loganyoutube4818
@loganyoutube4818 Месяц назад
@@zofa300because he is a RU-vid mechanic
@yansilva6886
@yansilva6886 8 лет назад
After watching numerous other YT videos on this subject, I found that yours is the only one to logically explain the steps to topping up the refrigerant. You were the only one to mention the IMPORTANCE of making sure the valves are in the correct position BEFORE attaching to ports (and can of refrigerant). Excellent! The best presentation yet on this subject! Keep up the good work!
@crisperez592
@crisperez592 Год назад
It’s impossible to get them mixed up . That’s why they are different sizes.
@juanhermenegildo8806
@juanhermenegildo8806 11 месяцев назад
​@crisperez592 I believe he is referring to making sure the valves are closed at the manifold (clockwise) and valves at ports are also closed or backed out (counter clockwise) to not depress the Schrader valve. That's important stuff. You are correct though. Impossible to get them mixed up.
@wholeNwon
@wholeNwon 8 лет назад
Good explanation. I would suggest using the refrigerant to flush the air from the charging hose before allowing it to flow into the AC system. There is a valve for that purpose on your manifold gauge set. Sometimes you don't get away with turning the can upside down and allowing refrigerant to flow into the system in the fluid state. I'd keep it flowing in the gaseous state just to be safe.
@cooldude2245
@cooldude2245 8 лет назад
Some vids say 12 to 3 turning of the can. Others say all upside down. Even on the can of refrigerant it says hold upside down so which is right?
@broken1965
@broken1965 8 лет назад
purge with the shrader valve on manafold after connecting R134a then open coupling valve slowly on low psi side to charge watch gauges
@tyrc12pro94
@tyrc12pro94 2 года назад
@@cooldude2245 did u get a answer? I still am confused. Everyone says different
@chuckk5699
@chuckk5699 Месяц назад
I am reasonably proficient with a/c. Watched several videos just for a refresher. Yours is one of the best if not the best. Great job.
@haroldsaalfeld7199
@haroldsaalfeld7199 3 года назад
Outstanding video demonstrating step by step analysis. This man is a natural born instructor.
@douglashornbeck1170
@douglashornbeck1170 5 лет назад
Great job on the video. I love in-depth tutorials that make sense! Too many people are out here making repair guides that don't understand what they're repairing and working on. Great job my friend!
@fleissman
@fleissman 3 года назад
Excellent presentation! It's the most useful ac troubleshooting video I found on RU-vid. Kudos!
@mikehart6708
@mikehart6708 Год назад
Very clear explanation. I especially liked your trouble shooting guide about the meaning of incorrect pressure readings. Very helpful. You even showed what they mean on both expansion valve and orifice tube systems. Very good. Thank you.
@RangerCJ
@RangerCJ 8 лет назад
This is a very good and helpful video. Thanks!
@bmiadmin5784
@bmiadmin5784 Год назад
A great educator with genuine knowledge!!! Much better than others....
@aixafarinas
@aixafarinas 5 лет назад
This guy is the best, after this I’m ready to fix my ac
@slava7935
@slava7935 4 года назад
Best way, and fastest to get the liquid out of the can is to keep it upright in a bowl of warm to hot water. Also, when adding refrigerant make sure that high side(red) valve is closed off.
@christopherhendricks4369
@christopherhendricks4369 2 года назад
But. With this being said add your refrigerant slowly
@jamesfoley3018
@jamesfoley3018 3 года назад
Thks for the update. Before you open the low-pressure value I'm sure you bleed the air from the service line before opening the low side. Thks again. You are a skilled technician.
@TheUltimateCrash1990
@TheUltimateCrash1990 4 года назад
Thank you so much! I needed to have this explained to me with details like this video did.
@matolittleelkwells5377
@matolittleelkwells5377 3 года назад
Awesome video keep the cameras rolling and doing what you do
@FireEater
@FireEater 7 лет назад
Love your videos very informative and straight to the point thanks from New York
@eoken1788
@eoken1788 8 лет назад
did this about a year ago but was not sure what numbers were my target for the high and low side. Thanks for the helpful video! I will have to check my work now
@myRatchets
@myRatchets 8 лет назад
+Eoken np, glad you liked it. cheers
@angelyair1121
@angelyair1121 3 года назад
great video, buddy - thank you for explaining the possible pressure readings and what they might mean
@onesikm3
@onesikm3 4 дня назад
Best explanation covering all possible scenarios
@kugmyster
@kugmyster 8 лет назад
Love the white board, best vid for DIY. Thanks man...
@VirginiaRealEstate
@VirginiaRealEstate 8 лет назад
wow! I love the way you explained it. i wish ALL DIY videos were done this way.
@christopherhendricks4369
@christopherhendricks4369 2 года назад
Your video does a great job explaining everything and how the numbers work. Thank you
@davidg5704
@davidg5704 4 года назад
Best videp ever explaining the 134a gauge levels. 👍😎
@johnmeek6790
@johnmeek6790 2 года назад
Best video I've seen so far. Keep up the good work !!
@walteriraparksjr2622
@walteriraparksjr2622 3 года назад
You are Great please keep up the great job you are the only one that lets us know what to look for.
@oljames1687
@oljames1687 8 лет назад
..most mini-vans and larger suv's have front & rear AC/Heat that use both an Expansion Valve & Orifice Tube. Great video !!!
@myRatchets
@myRatchets 8 лет назад
+Ol James good info, thanks for sharing.
@Jursaw
@Jursaw 8 лет назад
I appreciate theses types of videos
@ronnieoconnor5192
@ronnieoconnor5192 5 лет назад
Terrific explanation: clear and thorough!
@FarmDad
@FarmDad 3 года назад
Very well done video. Covered a lot in a small amount of time.
@flyboy2610
@flyboy2610 7 лет назад
Great video! I found it very helpful! Thank you.
@markwilliams8572
@markwilliams8572 Год назад
Great commentary and well expliained with easy logical explanations 👍
@pauleohl
@pauleohl 5 лет назад
Excellent video...with just one error. You did not show to purge the yellow line of air when you added the 134a.
@tudocervera3764
@tudocervera3764 4 года назад
i noticed that also there fore causing air and condensation into the system
@vergiemondejar7554
@vergiemondejar7554 2 года назад
basic.
@pauleohl
@pauleohl 2 года назад
@@vergiemondejar7554only basic after you know to do it.
@dekebell3307
@dekebell3307 6 лет назад
Great video man. Thanks for making it!
@shortridgegregory
@shortridgegregory Год назад
Excellent job. Very helpful and thorough.
@randymack1782
@randymack1782 Год назад
i appreciate, i was trained 37 years ago, under old R12 stuff, still have a bunch of r12 cans, and 1 big tank, but never worked on 134, just bought gauges couldnt find vacuum pump? stolen many years ago i guess, and rebuilding a vehicle i got talked into, so needing to fix air. i had fundementals, just needing a brush up on this
@mtay65
@mtay65 4 года назад
2:58 is purging of air in both blue and red lines needed at this time before you turn the AC on?
@MrNinobonito22
@MrNinobonito22 4 года назад
But I have to say.....you are one of the best ones explaining in detail the process....thank you
@gregmickey7038
@gregmickey7038 3 года назад
Thank you for this helpful video! I especially appreciate the theory portion. I am hoping you or someone else can help me understand my results. My cold static check at ambient 76F is 60 psi low side and 80 psi high side. Dynamic check at 76F is 85 psi low side and 100 psi high side. I am having a hard time confirming that the compressor is engaging because of its location. Can you help me understand these numbers? Does the compressor appear to be running?
@louissparks2496
@louissparks2496 Год назад
That pretty comprehensive. You're a good explainer.
@MrSirMarcin
@MrSirMarcin 7 лет назад
Best video I've seen for so far.
@rockraiser3030
@rockraiser3030 4 года назад
EXCELLENT VIDEO!! thank you so much for this. Added 1 can and me nibs are back on full high beams!!! Lol I'm in AZ so its nasty without A/C!! LOL
@joepiet
@joepiet 2 года назад
Just saw your video on charging A/C, and I like it. thanks.
@JosephDungee
@JosephDungee 3 года назад
Perfect. Great Information, shared!
@madmike4
@madmike4 2 месяца назад
Great job. You explained this very well . Now I know what to do . Thanks again 👍
@Bfocus23
@Bfocus23 Год назад
Hay man I appreciate you for you knowledge and information thanks a lot bro I support your Chanel
@steelcty563
@steelcty563 Год назад
Most informative video I’ve seen anywhere
@cedricmerritt7664
@cedricmerritt7664 7 лет назад
Great Video, Thanks!
@newsguyonsite
@newsguyonsite 3 года назад
Great tutorial, easy to understand.
@michaelfriend1853
@michaelfriend1853 6 лет назад
The best ac video on RU-vid
@flakdawg
@flakdawg 8 лет назад
Awesome! Great vid. Now more motivated to take the course. Thanks!!!
@myRatchets
@myRatchets 8 лет назад
+F.O.U.O Cruz Glad you like the video, thanks for commenting.
@srdporter
@srdporter 8 лет назад
Great video as ever. Don't you have to prime the yellow line so as not to allow any moisture or air into the system?
@davidjacobin2850
@davidjacobin2850 3 года назад
awesome video!! Thanks for the class :)
@MUSICMAN0055
@MUSICMAN0055 Год назад
Great video , easy to understand
@KingBoxingandFitness
@KingBoxingandFitness Год назад
Great video . Feeln confident now
@JohnPearlman
@JohnPearlman 8 месяцев назад
Very clear to the point instructions
@ironhead320
@ironhead320 7 лет назад
great stuff question my high side is close to where it should be but the low side is 17psi but when adding R134 low psi doesn't change
@tommacarthur1026
@tommacarthur1026 2 года назад
This is a fantastic video!!!! thanks!
@zyxnix
@zyxnix 3 года назад
Dude, excellent video.
@tareka.d1345
@tareka.d1345 8 лет назад
Thanks my friend.. If i have a difficulties from my work, i will have your expertiest advice, right?
@georgenettlesjr1466
@georgenettlesjr1466 7 лет назад
thanks for great insight on Gauge Set
@fredblogs219
@fredblogs219 2 года назад
Succinct and to the point. Great job!
@BigSexiMan
@BigSexiMan 8 лет назад
Awesome job! Thanks!
@AlexanderHernandez-vu5tr
@AlexanderHernandez-vu5tr Месяц назад
That's is a very good Information Thanks
@jacklabloom635
@jacklabloom635 5 лет назад
Great video. Thank you.
@Freedomaenima
@Freedomaenima 2 месяца назад
Beautiful video.
@nwcup
@nwcup 3 года назад
Best description I've seen for sure. Question. My symptom is whenever I turn on my defroster (with or without heat) the ac clutch engages and my radiator fans activate? Any advice on this? I changed the ac pressure switch to no avail.
@YXUHUNTER
@YXUHUNTER 8 лет назад
Great video! Just like every time! Thank you!
@myRatchets
@myRatchets 8 лет назад
+BrokenCross np, glad you liked it. cheers
@watchmanonthewallcouk6498
@watchmanonthewallcouk6498 3 года назад
Thank you Very thorough vid, Q why wouldn’t air be drawn into the system through the yellow line ahead of the refrigerant ?
@jessebunting1808
@jessebunting1808 4 года назад
Very good video. I only wish he had covered the process of using a vacuum pump to pull the system into a vacuum in order to pull out any moisture and to also check for leaks first. If the system holds vacuum for 15-30 minutes, you're good. If the pressure slowly goes back up, then you have a leak that needs to be addressed before you add more refrigerant (which will just leak back out). Still, a great overall description for a basic recharge using the gauges.
@agreen182
@agreen182 2 года назад
Super helpful thank you!
@rulebraking
@rulebraking 2 года назад
This is one of the better videos on the subject on YT - congrats. BWT, got a Q on an issue that is not covered well most anywhere - AC works fine during cool temps (morning n evening) but not in hot weather!! Any idea why this is?
@darwinzo4905
@darwinzo4905 Год назад
Hi there, im a fan of your videos. I keep on adding refrigerant to my car a/c system every after 2-4days. My car doesn't blow cold after it is stock for a day even though i just had it refilled with refrigerants.
@cJared3b
@cJared3b 6 лет назад
When you got your final readings, the clutch engaged and the pressures changed. Are you supposed to get them with the clutch engaged or disengaged?
@ledger35
@ledger35 3 года назад
After you attach the can of Freon, don’t forget to slightly loosen the yellow line at the manifold so you can burp the air out of the line. If you don’t do this, you will let air into the system and this is not good. He forgot that step.
@europana7
@europana7 10 месяцев назад
Master class on AC !!!
@mikekendall5835
@mikekendall5835 Год назад
Great informative video
@nickayivor8432
@nickayivor8432 Год назад
What do you call INTELLECTUAL AND PRODIGY and SUBSTANTIAL add one more KNOWLEDGEABLE the answer is Ratchets and Wrench Tutorial brilliant video amazing thank you for sharing what you know with us Take care and have a great Weekend 👍 INTELLECTUAL Ratchets and Wrench From Nick Ayivor from London England UK 🇬🇧
@RandyMabusedJW
@RandyMabusedJW 5 лет назад
Great job. Thanks
@FloridaManFireMan
@FloridaManFireMan Год назад
Really great video
@jimbola77
@jimbola77 7 лет назад
great video partner love all your video's I think u forgot to purge your charging hose yellow one, but great explanation!!!!
@WhyJesus
@WhyJesus 7 лет назад
maybe he didn't want to get busted for venting and be deported ;)
@flyboy2610
@flyboy2610 7 лет назад
Now THERE'S an intelligent comment :rolleyes:
@johndziegiel588
@johndziegiel588 5 лет назад
He may have purged the hoses before recording. With the disconnects at the end of the hose, you could attach the hoses, purge them then attach to system. Then attach to the next system w/o purging again. But yes, purging should have been mentioned.
@raymarandola8071
@raymarandola8071 8 лет назад
I am trying to diagnose my 2000 Mustang GT A/C problem. I have been searching for hours and I cant find a video that has my specific issues combined with my troubleshooting results. You videos are very informative and I was wondering what you think. The A/C blows warm air and the compressor clutch is rapid cycling. My low and high pressure switches ohm out correctly. Manifold gauge readings are @80/80 static (80 deg F 30% Humid). When the A/C is on the gauges read 20-60 on the low and 100-125 on the high. If I jump the low pressure switch, to stop the rapid cycling, the compressor runs continuously and the low side goes to 0 and the high side stays at 100-125. Bringing engine rpm up to 2500 never increases pressure. Gauge pressures are unaffected by rpm. No obvious leaks but I have not leak tested yet. I'm narrowed down to a leak causing low charge or the compressor is bad. Any advise would be appreciated. Thanks for the great videos
@abuaglablola7821
@abuaglablola7821 7 лет назад
ilike ur videos what the normal value for both side pressure when compreser engage . and what the normal value when compresser disengage for both side pressure ?
@jonolin2384
@jonolin2384 7 лет назад
Is there anyway to get that chart for the a/c high and low readings
@johndumas4467
@johndumas4467 3 года назад
Hi... love all your vids. If I let all the r134a out of my system and vac it out, will I need to replace the oil. I'm handicapped and trying not to have to pull the compressor to dump the oil and refill. Thank you for your time. Johnny
@amorales9613
@amorales9613 6 лет назад
Nice job!
@michaelserrano7097
@michaelserrano7097 4 года назад
I purge the 3 lines. Blue and red after plugging the lines with the engine off. Yellow
@joelthomas1385
@joelthomas1385 5 лет назад
Great video
@bertreriksen1297
@bertreriksen1297 6 лет назад
what are the temperature scale on the gage for on the low side 90degrees line up with 105 psi and it should be 45-55 psi and the T fitting on the yellow hose has a cap if I take the cap off and store the other end of the yellow hose there like I see you have it do I have put the cap back on when I use the gage thanks for your help Bert
@JT-gq8wv
@JT-gq8wv 5 лет назад
EXCELLENT. Thanks.
@Erweenie
@Erweenie 3 года назад
The video I needed
@jessejaviangel
@jessejaviangel 4 года назад
You gave a few scenarios except one. What if the low side is right where it's supposed to be but the high side is too low?
@Sitchinte
@Sitchinte 7 лет назад
very good, thanks
@turbocamaross5.323
@turbocamaross5.323 6 лет назад
Are the couplers that connect to the car the only ones open? Meaning the ports on the gauges are closed since you aren't using a vaccum
@mikegarcia2367
@mikegarcia2367 8 лет назад
on the dynamic pressure reading with the ac system on and truck running and the compressor running. . my pressure gauges fluctuate from 18- 40 low side and 200-280 high side like ever 15 to 20seconds. I just install a new compressor orifice tube and accumulater so. the temp on the front air vent will show 60degrees F. .... So is this normal?? or is the pressures suppose to be constant.???
@sirtokesalot47
@sirtokesalot47 5 лет назад
you dident purge the yellow line before u let the 134a into the system so u also let a yellow line full of air into the system as well.
@jasonmckeaigg9143
@jasonmckeaigg9143 4 года назад
Since it had pressure in a/c need to purge blue low & red high plus purge yellow suction..great vid👍
@andremachadomonte
@andremachadomonte 20 дней назад
Great video!!! I really appreciate videos like yours that are easy to understand!What would it be an acceptable psi difference between low and high? My high system reads: 125psi and low 85psi Thank you very much!
@elizabethderosa6012
@elizabethderosa6012 7 лет назад
good job i got question what would be the problem if my system does not suck out freon out pf the can hi and low pressure 80psi with ac rinning thanks paul
@flyboy2610
@flyboy2610 7 лет назад
Which type of system do you have?
@mangatsinghdeol2941
@mangatsinghdeol2941 4 года назад
Great video bud. Learned lot more than i expected...Thank you for making this awesome video.
@richarddiaz8248
@richarddiaz8248 Год назад
Thank you so much
@kazekagetilo
@kazekagetilo 4 года назад
Hey brother. I have 60 on the low side and 200 on the high side. What you think that could be?
@otobulakenyo2664
@otobulakenyo2664 9 месяцев назад
Sir what is the ideal reading on the manifold gauges in the low and high side to determine how much refrigerant to top up...thanks
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