How To PROPERLY Flush and Recharge A Contaminated AC System.

How To PROPERLY Flush and Recharge A Contaminated AC System. In this video we are going to take a look at what it takes to clean out a contaminated A/C system. The vehicle in this video had too much oil in the system causing the high side pressures in the system to be extremely high and the low side pressures to be extremely low. The vehicle in this video was actually venting pressure out the pressure relief because the high side pressure was so high due to the amount of oil in the system. The only way to ensure the proper amount of oil is in the system is to flush out all the old oil and add the correct amount.

Proper AC system flushing requires nearly complete disassembly of the ac system. Flushing solvent needs to be ran though all the lines and the evaporator until the flushing solvent comes out clear. Things that should not be flushed are the: Compressor, Condenser, Orifice Tube or Expansion Valve, any line with a muffler, and the Receiver Dryer/Accumulator.

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00:00 Intro
00:03 Why you would need to flush an A/C system
00:42 Why I'm flushing my A/C system
2:22 Establish what direction the refrigerant flows in.
3:30 A/C System disassembly
4:41 How to flush the A/C components
6:43 The components you CAN'T flush
11:04 Flushing my system
12:42 What A/C oil do you need?
15:09 System reassembly
15:26 How to charge the system with oil after it was flushed
19:11 Pulling a Vacuum on the A/C system
23:35 Refrigerant selection
25:55 Charging the air conditioning with refrigerant
27:47 Final manifold gauge readings
28:43 Vent temperature readings
29:22 Thanks for watching!

#acrepair #airconditioning #airconditioner

Disclaimer:
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[RepairGeek]

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[williamcawelti]

Finally, someone with integrity who can actually admit he screwed up, as opposed to blaming it on someone or something else or making up some bullshit story. Then he goes in depth explaining the entire AC system. He explains what and what not to do.

[DoktorHalloween]

I am a DIYer and this removed so much of the mystery around AC systems. And your links are exceptionally thorough. Thanks, and great job!!!

[ozzstars_cars]

For DIY'ers that might not have much of any a/c experience listen to the info in the video. Spot on and excellent info to guide you in the right direction! Nice work.

[applecider]

Probably one of the best and informative ac videos out there. Very knowledgeable content and it shows how to do things right. I am retired ASE certified Master tech for 35 years. Could not have done this video better myself 10/10. Great job.

[gofrcco]

All hail to you, my dear brother...and we thank you for your diligence and guiding you in the right ways, and you deserve all the appreciation

[Leto]

You said an important thing
No matter of which gas brand you charge your system as it working properly and no it has no leaks...
Golden advice to anyone living in hot. States dude.
Thanks a lot for sharing us your experience on this issue.
I'm glad i knew recently that cleaning the evaporator also is a waste of money and time just buy a new one instead.
Thsnks again from 🇸🇦

[chrisspanyer]

Great video as always. Thanks.
Don’t use shop air to break vacuum. Use nitrogen instead as it’s dry gas. Shop air will introduce water into system

[leggoego]

I've been on YT since the start, and I've watched thousands and thousands of how-to videos across hundreds of disciplines from myriad creators. I can confidently say your style of content creation is among the most concise and thoughtful on this whole platform. I'm glad I found your channel. Thanks for all you do!!

[tasaman]

Two days ago my compressor went out. Tomorrow im on the way to the junkyard. New replacement is $400 so im gonna do it cheap first. This video gives me a lot of the information i needed. Thank you

[gstatz]

Hello! It's by far the best video on AC. A few questions: why should some of the oil in a compressor with a fixed stroke go into the circuit? Like a variable lift compressor, the fixed lift compressor also has a swash plate. Both need to be lubricated. What should be lubricated in the circuit? The only moving parts in the circuit are the valves on the compressor, which do not require special lubrication, and possibly the expansion valve.
The dryer consists of a surface, for example granules, onto which moisture is absorbed. If this surface is contaminated with oil or is even covered with oil, moisture will no longer be absorbed. In my opinion, oil in the circuit is oil from the crankshaft housing which over time gets into the circuit along the pistons

[twincam]

Purge your line from your can to manifold before opening to charge. Good info on freon with leak sealer and added oil will cause nothing but problems.

[jameskoecher]

Great video, one observation :when charging with 1lb. cans, after attaching can tap and opening can tap valve to each 1lbcan it is a good idea to loosen charge hose at gauge manifold slightly to let tiny amount of refrigerant to exit to purge hose of any air that entered during attachment of refrigerant can before opening low side manifold gauge.

[CaseTheCorvetteMan]

You may have made mistakes first time, but the man who never made a mistake never made anything.

Really good video mate 😊

[tomsiri]

out of all car a/c video yours is the most comprehensive. well done. thank you.

[hotrodray]

FYI
We recently installed a new AC kit. Had an undetectable leak. No dye anywhere. Held perfect vacuum over night. Held 125 psi of pressure over night.
Hook it up to the 175 psi compressor and found a bad hose crimp.
Dont overlook the simple things. KISS.
Weve always used lacquer thinner for flushing. Cheap, dries out easily blowing air through. Never had a problem.
Also its easy to add an inline filter at the expansion valve and condenser. They sell little cone shaped filters that slip into the connection fittings. Couple bucks each, slip right in.

[johng.]

Very good video! You touched on many points and I would recommend anyone doing this on their own (I learned the hard way also!)
I recently had a compressor replaced on my 2001 Buick and neglected to change the drier, condenser, orifice tube. Mistake!! Changing-out the compressor "ONLY" was a huge NO-NO.
The shop that changed it out really didn't inform of the negative aspects of everything involved. Ultimately, I ended-up doing everything (Including a flush) on my own.
Also - I was under the impression that compressor hoses (Like yours, with mufflers) were not to be flushed? Interesting. I'm glad your A/C is working!
And lastly... Thanks for not falling for all the A/C refrigerant marketing crap! Use only 134-a and don't fall for all those sealers etc. Thanks!

[michaelp]

Done Right...
Short and Sweet...
Most informative...
Most Educational...
Great Job on format and presentation.
NO LOUD MUSIC...
Again Great Job....

[EdvinQuintana]

I don’t speak English, but! You’re video helped a lot, it easy to understand. Gracias carnal

[thebudgettrackjunkie]

Thank you for this! I'm currently replacing the entire AC system on my S2000 minus the hard lines. It helped to see how you were flushing your lines out and i have that exact aerosol solution you used as well. Replacing my evaporator core, expansion valve, drier, condenser, compressor, and high/low hoses. Only thing i'm keeping are the actual hard lines so I wanted to make sure I got those cleaned out properly.