Pretty much all 2010+ vehicles have a pressure sensor in the high side and you can read this from the pcm thru OBD. This sensor also takes place of the high low switches with the pcm controlling compressor output.
Like that jaguar you mentioned I have asked the question many times "why would they put that there". It seams that things like service ports, fuse boxes, the battery, belts, and anything else that should be checked or replaced as routine maintenance should have easy access like the OBD2 plug does. I tried to help this dude in a parking lot with a flat on his range rover once and the tool provided did not fit the stock lug nuts. I just so happened to have a plug kit and 12v compressor in my car that got him out of there.
28:53. I read the motorage A7 ASE book and it said "a common misconception is that any oil recovered during the recovery process should be measured and added back into the system. Truth is that very little oil should be lose during this procedure. Typically, oil collected in the oil recovery bottle of the machine is a result of lack of machine maintenance and/or oil trapped in the internal lines after use of the onboard oil injection feature"
That's not totally untrue but if it were the case then every single system from which you recovered refrigerant would produce the same amount of oil in the bottle.. and some vehicles will produce quite a lot in the bottle, while others produce almost none... and it also depends on the machine
Great video I've been watching your videos for a while now and I am going to go take the A -7 test on the 16th I've been studying A lot and I'm ready for this test after this I am going to go for my electrical test next
My car had a small leak the system held the new charge for about a year before it stopped working so must been a really small leak. Recharged again this time put pro seal in the system and 2 years now still working
Good Evening McCuistian have a great day, take care McCuistian ❤ it more great stories 👍 👏 👌 Thank you very much McCuistian From Nick Ayivor from London England UK 🇬🇧
Great review !I have a question as usual. A tech that I work with says that when you pull the system into a vacuum, just because it remains in a vacuum does not mean there is no leak.Do you agree?
excuse me sir I have a question, as video said there will be more and more liquid refrigerant in accumulator how to handle it, and whether the oil will get into the AC system or just in compressor
The accumulator "accumulates" oil and refrigerant and is the place where oil and refrigerant are mixed. It is designed for that purpose. And the u shaped tube has a filtered orifice at the bottom of the U to prevent liquid refrigerant and oil from making it to the compressor.
Very knowledgeable but had to freeze the video to examine the diagrams as his monster head was way to close to the camera and don't need to count nose hairs...lol...gleaned great info fro this video, though...
@@McCuistian ...having trouble getting cool air to come through into my 04 silverado 1500...everything checks out OK and still have no cold air. Considering replacing the BCM although the one in now is doing a good job...maybe not good enough...lol
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Pretty much all 2010+ vehicles have a pressure sensor in the high side and you can read this from the pcm thru OBD. This sensor also takes place of the high low switches with the pcm controlling compressor output.
Keep it up I can't thank you enough for the training. 👍
Like that jaguar you mentioned I have asked the question many times "why would they put that there". It seams that things like service ports, fuse boxes, the battery, belts, and anything else that should be checked or replaced as routine maintenance should have easy access like the OBD2 plug does.
I tried to help this dude in a parking lot with a flat on his range rover once and the tool provided did not fit the stock lug nuts. I just so happened to have a plug kit and 12v compressor in my car that got him out of there.
I bet that was a workout
Thank you for the video !
Thank you for the video sir ! ❤
28:53. I read the motorage A7 ASE book and it said "a common misconception is that any oil recovered during the recovery process should be measured and added back into the system. Truth is that very little oil should be lose during this procedure. Typically, oil collected in the oil recovery bottle of the machine is a result of lack of machine maintenance and/or oil trapped in the internal lines after use of the onboard oil injection feature"
That's not totally untrue but if it were the case then every single system from which you recovered refrigerant would produce the same amount of oil in the bottle.. and some vehicles will produce quite a lot in the bottle, while others produce almost none... and it also depends on the machine
Thanks you enough for in the training beautiful videos
Great video I've been watching your videos for a while now and I am going to go take the A -7 test on the 16th I've been studying A lot and I'm ready for this test after this I am going to go for my electrical test next
How were they? I’m taking both on the 17th of this month
Always interesting and informative. Thank you for sharing. Is there a tool for measuring oil concentration in A/C systems?
Not that I know if
*of
My car had a small leak the system held the new charge for about a year before it stopped working so must been a really small leak. Recharged again this time put pro seal in the system and 2 years now still working
Knowledge is power!
Good Evening McCuistian have a great day, take care McCuistian
❤ it more great stories 👍 👏 👌 Thank you very much McCuistian
From Nick Ayivor from London England UK 🇬🇧
Very good
Great review !I have a question as usual. A tech that I work with says that when you pull the system into a vacuum, just because it remains in a vacuum does not mean there is no leak.Do you agree?
A pressure leak won't show up on a vacuum test.. he's right
Pressure inside the system can go to 300 PSI but all you have is atmosphere when you're doing a vacuum test
@@McCuistian Thank you for confirming.
excuse me sir I have a question, as video said there will be more and more liquid refrigerant in accumulator how to handle it, and whether the oil will get into the AC system or just in compressor
The accumulator "accumulates" oil and refrigerant and is the place where oil and refrigerant are mixed. It is designed for that purpose. And the u shaped tube has a filtered orifice at the bottom of the U to prevent liquid refrigerant and oil from making it to the compressor.
@@McCuistian How liquid refrigerant back to the AC system?
@@yeallen9468 The refrigerant constantly changes from a gas to a liquid and back. But to recharge the system you must have equipment.
@@McCuistianhow liquid refrigerant out of the accumulator back to system?
@@yeallen9468 it's automatic
Following from United Arab Emirates
Welcome to my channel!!
is there a link to the slideshow he's using?
I built this slide show myself so there is no link to it
Need help ase test I take many times still not pass have study guide please help thank you
Go to Amazon. They sell study guides
Very knowledgeable but had to freeze the video to examine the diagrams as his monster head was way to close to the camera and don't need to count nose hairs...lol...gleaned great info fro this video, though...
I'm doing the videos a different way now to avoid having my face in front of the screen -
@@McCuistian ...having trouble getting cool air to come through into my 04 silverado 1500...everything checks out OK and still have no cold air. Considering replacing the BCM although the one in now is doing a good job...maybe not good enough...lol
flammable...lol what the hell?
R1234 yfo is used in automotive.