HOW TO Vacuum and Recharge AC for CHEAP! Harbor Freight and Walmart!
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- Опубліковано 28 бер 2020
- How to vacuum and recharge your AC with harbor freight tools (Venturi pump and manifold gauge) and Walmart refrigerant! For even cheaper you can use a cheesy one gauge recharge hose kit but if you’re recharging, hopefully you just fixed an issue. To have properly diagnosed the issue, you need a manifold gauge!
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High pressure could also be a bad compressor. Have it checked. Also, like everyone else said, purge the yellow hose line before opening the low side valve, it just takes a couple seconds and you get all the air out of the system.
If u monitor this what air line system did u use to connect to the vacuum. Ihave a scale to weigh my refrigerant that I need. I have the vacuum and manifold gauges just need the air line and compreasor.
What’s that port on top for that says AIR? Should I open or close it when pulling a vacuum?
that cheap vacuum thing will pull vacuum down pretty quickly but is it enough time to remove all moisture and such from the system? i bought one of those and with my 21 gallon compressor it went from around 100 psi to about 40 psi in a matter of minutes. when i used my brother's real vacuum pump i ran it for about two hours but had i ran this cheap thing for even close to that long i would have burned my compressor up.
it works for a quick vacuum but i would not want to try and run it for more than a few minutes at a time. it just uses too much air.
will this work with r12?
What valve did you replace?
The pressures could be higher due to another problem with the AC system or maybe you just didn’t show it but if you didn’t purge the air from your charge hose you would end up contaminating your refrigerant and since it’s not just refrigerant in there air and moisture have different boiling pressures than a refrigerant.
Good Video, Thatnks!
I've been a mechanic all my life working dealership done a lot of AC work along with many other things and I can't believe some of the comments on here making it sound like if you don't Purge the air from the yellow line you're going to blow the compressor! I've never had that happen it's not that complicated to vacuum and recharge a system. Some of your directions in these automotive manuals just go overboard
What I get from your comment is that if I take it to a shop I'm going to overpay and they won't do it right either. Lol
@@Yophillips3272 you know how it is some will some won't but I've never had that problem and they give everybody the impression that it's so complicated that if you overlook a little thing like that it's going to ruin something that's just absolutely not true
@Thomas Duncan I get what your saying.
Hey great video,! If i changed all my ac components and flushed the lines. Can i just pour the required oil into the compressor . I drained the oil in the new compressor and added 9 oz.
yes if it all of the oil will fit in it, some come oil in the compressor
Pressure loss on the high side.
When I do the vacuum test, the low side stays on -30 PSI for an hour BUT the high side seems to lose vacuum. . Is this a concern, the video doesn’t seem to look at the high side which I don’t understand why? The 2 sides don’t seem to be “connected” when the car compressor isn’t running, the car turned off
With engine iff you should have the Same reading on both sides.
How did you only pay $7 for that gizmo ? I checked on it at Harbor Freight 2 days ago, and it's priced at $16.99 now.
I was just going to menton that, they STILL are.
Thanxs for the vid.
Dodge Cummins & old toyota trucks- right on brother!
I know I’m bad with the purging of the refilling lines lol. Never had an issue yet but yes the professional way is to purge any air. 70 bucks for the manifold set? That’s too expensive for china freight. The same manifold is around 20 bucks off Amazon.
I go by how many pounds the system takes and with auto ac I use my nifty 134a gauge that has the blue optimal charge indicator. Remember that the new 134a cans will need an adapter to use the piercing valve as the cans are self sealing. At first I thought that it was annoying but honestly am glad the cans are that way now. You don’t need to keep the valve attached to the can if partially filled now😁
Need to bleed the yellow hose before opening valve
Did he nearly blow his hand off by opening the red value and letting high-pressure flow back towards the can??
Good job brother. Hey I interested on a truck like that yellow one where can I find one.
jose hernandez I have a couple (Cream 1985 4runner) and found both on Facebook marketplace! They’re out there but getting harder to find!
@@doublewrench69 good day brother I need a pickup truck 22r engine.
I was told never open high side valve😳?
Thank you my friend!
u added air in da system there is a purge valve on da manifold gauge.wen u connect da can there air in da line u purge it til u see white smoke
This is a very true statement. The entire volume of air that was in the yellow hose was pushed into the system.
You spelled duh wrong
when does the"how to" portion start for the vacuuming? cuz is nice that you already did it but wtf? why put 'how to' if you don't actually show how to?
Your video was a god send for me. Thank you!!!
You use the gauges and add freon until the pressure correlates to the ambient air temperature using the chart not by weighing the freon. You will never get it as cold doing that.
As long as the manifold valves are turned off there shouldn't be any air in any of the lines including the yellow line after you run the vacuum.
It never taken me thst long to put freon in my vehicle, then again i have never vacuumed out the system either. Now i just roll the window down as i have three personal vehicles and non have a/c except my semi😂
You didn't purge the lines all the way down to the closed cuplers then open the couplers to purge out all the air because you just ruined what would of been a colder ac if you would of purged the lines
16.99 for the vacuum pump 😉 love the legal disclaimer good cya brother especially posting video 👨🔧😊 good information though
If I only you could be heard.
Ok I appreciate you went thru the effort of doing a video but please note couple of things....
Purge the air out of the line from the can of refrigerant before opening the manifold low pressure line.
Not a great idea to flip the can upside down when charging. You're adding a liquid slug of refrigerant into the system by doing that, which I've seen can lock up the compressor. Keep it upright to add gas and not liquid. I often put the can into a bowl of warm water to help speed it up a bit.
appreciate the extra info. I ended up here just to see if that vacuum thing worked since I have a compressor but don't really want to buy a vacuum pump.
@@5PYZ3R same reason that brought me here. I'm interested to see how to use that cheap vacuum pump from Harbor Freight.
@@5PYZ3R AutoZone offers free tool rental on vacuum pumps. Some of the other chain auto part companies might do the same. Rented one from AutoZone a few years ago along with a gauge set.
@@roberts1159 yeah I noticed that, probably going to do that instead. thanks!
@@roberts1159 its not " free " if you aint got the 350$ to rent the guages and the pump.
I Must Say, You Did Not Bleed The Yellow Line Of Air After Hooking Up The Can, Before You Opened The Low Side !!!
So then, what would be the best way to do that? instead of saying what he didnt do...
@@djshotokan so before opening the valve on the low side (blue line), he should open the yellow line by the gauges to bleed or let the moisture out from the can to the end of the line at the gauges, because you want to bring zero moisture into the ac system, after opening and closing the yellow line for a sec then you can open the valve on the low side (blue line), again minimizing moisture in the lines and into your ac system
@FITNESSOVER45do you depress the Schrader valve at the gauges with the Freon can connected at the bottom ?
Yes @@JosepGee
I know you got a little excited, but you are not supposed to turn the can upside down you can damage the compressor...best thing to do is to put in a bucker of warm water.
You know, a few cans actually say turn and shake 180 degrees. I was surprised to see that.
Bro, before connecting the hoses to AC lines, you should purge them from air, cause when the air enters the vacuumed system rapidly, it creates a moisture which will destroy the system, next time make sure you've purged the air out of the recharging hoses. secondly, it is better to recharge the new systems in the form of gas not liquid, meaning you don't need put the can upside down, just open it, sure it takes more time, but it is safe for the system.
Can you please explain how to purge them? Thanks, Bob.
New system?
@@gmax341 Sorry I meant any systems after R22 Gas Type
@@bobnan9815 If you're topping up the the system, just open the can and loosen the yellow hose at the guages until the freon comes then tighten it again, if the system is empty, you need to purge the blue hose which goes to low side of the system as well before connecting it by opening the blue valve at the guages .
@@bobnan9815 there is a valve at the top of the yellow service line that has a service port (schrader valve) you have the can of freon connected and open with high and low at the manifold closed and press the schrader valve to purge the air out of the service (yellow line) before you begin to fill your ac system (until freon comes out) - wear googles, and them open the low side to fill the system with no air in the manifold... peace
You just introduced air and moisture back into the system because you did not purge the refrigerant hose before adding refrigerant.
Dude wtf, it was cheap
@@raymondgarza8812 And that negates doing it the right way?
@@frequentlycynical642 yeah might as well go to a shop
Douchebag comment
Your not supposed to turn the can over..it should be 12 o clock to three o clock..rock the can..you dont want to freeze the compressor...I learned this from a pro of 45 years
Thanks for the video, yeah I have a leak in the AC system on our '99 GMC Safari van and have since the end of last summer. I might splurge and get the kit from Harbor Freight but knowing my luck I'd never need to use it again! Lol
Don't you hate when things don't work exactly like it's supposed to as in the pressure readings were a little high but yet you still didn't put in quite the amount that is called for, it makes you wonder if the gauges are slightly off or if it's something else....
Jeff Stone yeah, that bugs me too! Maybe it’s from the ambient temp or humidity or something... ice cold air is good enough for me though!
@@doublewrench69 I agree
@@doublewrench69 I wanted to ask you since I wasn't aware that this vacuum pump requires a compressor to work what size compressor did you use? I have Harbor Freights Fortress 2 gal 1.2 hp compressor and I also have a Sears 25 gallon 5hp compressor but it's buried in the garage, do you think the smaller compressor would work?
@@bodeine454 75 psi for this pump... even a tiny pancake/hot dog comp would do the trick.
This would have been a great video had you explained what knobs you were turning and why
As well as where all the lines go and why.
Good news gentlemen, it’s as simple as red = hot side, blue = cold side. The gauge hoses will only fit in one place on any vehicle post R-12 era(pretty much after 1994 if I recall correctly. While the vehicle is running fill via cold side, with vehicle off, do whatever the hell you want basically.
Doesn't take a rocket scientist. You start by putting it in both the high and low side until you can't force it in anymore then you turn off the high side and then turn the truck or car on and then only put the rest thru the Los side or aka suction side.
If you can't figure that part out. You have no place messing with your ac lines.. This isn't a simple "top off".
Your video didn’t show the main point
You did not add compressor oil into the system after vacuum everything out.
oil does not get sucked out by the vacuum pump.
Galt Barber do i need to reoil if i just replace condensor ?
@@adrianvega4817 you have to add the amount of refrigerant oil into the condensor as recommended by the dealer yes
Dude!!! Do NOT hold the can upside down it does not have an internal stem for a reason . Doing that shoots straight freon into the system... You will pooch your compressor do your homework before just dumping shite into the system
Not if you have at least 10ft of hose before the compressor.
It was 4 dollars a can now is $15
fix the muffler
Edit your video
Edit your video and show and explain each step!!!!
At what point is there a how to.
At least he did it, which is more then i can say for you Ken!
Best way to ruin a compressor is to charge the system with liquid, not gas-that's what you are doing when you hold the can upside down
Not to mention he didn't put in new PAG oil first!
1. He said a shop already did that. 2. As long as there's 10ft of hose, it's OK to charge upside down. Shops have their tanks that way in the machines. Also shaking the can does nothing.
Excellent way to ensure compressor failure.
You didn’t explain sh!t
Where the hell the orange hose go ???? God damb it