HVAC Vacuum Problems: 5 Tips for a Micron Gauge Reading Jumping Around!

In this HVAC Training Video, I Show 5 Solutions to the Problem of a Vacuum Gauge Micron Reading Jumping Up and Down. Even after Pressure Testing, there may be a problem during the Vacuum Procedure and Standing Vacuum Test. I go over techniques to solve the problem. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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Our Related Videos/Articles
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
#hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #oil #vaccume #vacuum #freon #micron #gauge
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[@acservicetechchannel]

The E-Book and Paperback at our Website: www.acservicetech.com/the-book The Paperback at Amazon: www.amazon.com/shop/acservicetech Support the Channel- www.patreon.com/acservicetech Tool List- www.amazon.com/shop/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Related Videos: -HVAC 2 Hose Vacuum Setup vs ! Hose Vacuum Setup! kzbin.info/www/bejne/gGW0p5qmjquGb7c -HVAC Tips to Avoid Vacuum Problems! Top 15! kzbin.info/www/bejne/aJPRqYinaKhlbdk -HVAC Full Vacuum Procedure From Start to Finish! kzbin.info/www/bejne/rYq9aYqrmdCmmJI -HVAC Vacuum Procedure for a New Recovery Tank! kzbin.info/www/bejne/n5vdZoFqoNJoaNE -Vacuum Pump Setup, Break the Vacuum with Refrigerant! kzbin.info/www/bejne/iHKac4xtmc6rf8k -Vacuum and Charging of a Minisplit! kzbin.info/www/bejne/oWrYoJuYjqmoiNU Vacuum Tools: JB 6 CFM Vacuum Pump - amzn.to/2nqbvo8 CPS 4 CFM Vacuum Pump - amzn.to/2DxgPwY Appion Valve Core Removal Tool - amzn.to/2uYr8WL Appion Blue 3/8" to 1/4" Vacuum Hose - amzn.to/2uYlVyc Appion Red 3/8" to 1/4" Vacuum Hose - amzn.to/2uYg6Ro Yellow Jacket 1/4" by 1/4" 3’ hose - amzn.to/2umtcod Appion 1/4" by 1/4" and 3/8” hose - amzn.to/2Zyxzx9 Uniweld 1/4" by 1/4" 2’ hose - amzn.to/2GFov1Y CPS Vacuum Micron Gauge - amzn.to/2v1nM3O Supco Vacuum Micron Gauge - amzn.to/2v1JRiA JB Vacuum Pump Oil - amzn.to/2mGrlXy Checking the Charge: Yellow Jacket Refrigerant Gauge Set amzn.to/2aenwTq Refrigerant hoses with valves amzn.to/2aBumVI Yellow Jacket Gauge set & hoses amzn.to/2vLVkV9 Yellow Jacket 4 Port Manifold w Hoses amzn.to/2BkuGIq Digital Refrigerant Scale amzn.to/2b9oXYl Ratcheting Service Wrench amzn.to/2dGV4Nh Fieldpiece SMAN380 Digital Manifold Set amzn.to/3297zse Fieldpiece SMAN480 Digital Manifold Set amzn.to/337mGnq Compact Ball Valve for Refrigerant Hose amzn.to/2KUisW8 QuickDisconnect 90 for refrigerant hose amzn.to/2MMtVcg RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn Fieldpiece ST4 Dual Temp Meter amzn.to/2wc1ME3 Fieldpiece Bead K Type Temp Sensor amzn.to/2DBwKfs Fieldpiece Wet Bulb Temp Sensor amzn.to/2RRI7Tw Fieldpiece TC24 Temp Clamp amzn.to/2qHLyjZ Flaring Tools: Yellow Jacket Flaring Tool - amzn.to/2OBxGlM Spin Flaring Bits 1/4", 3/8", 1/2", 5/8", 3/4"- amzn.to/31BCs8Z Yellow Jacket Flaring Tool with Set Depth - amzn.to/2QIKsQH Yellow Jacket Torque Wrench - amzn.to/2NRR68Q Uniweld Swage and Flare Kit- amzn.to/2T55jyn Nylog - amzn.to/2MLJcch Ridgid Tubing Cutter - amzn.to/2DnjjR1 Wolverine Tube Reamer - amzn.to/2QGLyMV Swaging Tools: Manual Copper Tube Swage/Expander- amzn.to/2WRPa1M Spin Swaging Bits 1/4" to 7/8" for the Drill- amzn.to/2YQwwqS Uniweld Hydraulic Swaging Tool- amzn.to/2MlrI8m Uniweld Swage and Flare Kit- amzn.to/2T55jyn Uniweld Hammer Swage kit- amzn.to/2CzWMMU Uniweld 3/4" Hammer Swage- amzn.to/2CzXsSs Uniweld 7/8" Hammer Swage- amzn.to/2Mja5WE Uniweld Multi-Size Hammer Swage- amzn.to/2T3Cx1b Brazing Tools: Air Acetylene Torch setup - amzn.to/2aQalsb 15% Silver Brazing Rods - amzn.to/2gVLyLc Uniweld Cap-N-Hook and #2 Tip Oxy Acetylene Torch Setup - amzn.to/2STp3Fe Ameriflame Oxy Acetylene Torch Setup #1 &#2 Tip - amzn.to/2SRm3JF #2 Tip for Oxy Acetylene Torch - amzn.to/2SPDaeD Cap-N-Hook Tip for Oxy Acetylene Setup - amzn.to/2MbhpUk 40cu B Tank to 10cu MC Tank Acetylene Tank Fitting - amzn.to/2GxZZPi Nitrogen Regulator - amzn.to/2bXdR5f Uniweld NitroVue Flow Regulator - amzn.to/2GnsaAo Uniweld Nitrogen Flow Meter - amzn.to/2brvoBg Bernzomatic Trigger Start Lighter Propane/Mapp Gas - amzn.to/2vit0cv Uniweld Soft Flame Sweating Torch Setup for Acetylene - amzn.to/2DyzRD8 Flint Spark Ignitor - amzn.to/2L3P2u9 Stay Brite #8 Silver Bearing Solder and Flux - amzn.to/2XIDJsY Aluminum Braze Rods - amzn.to/2IGNMu Electrical Diagnosis Tools: UEI DL389 Multimeter amzn.to/2xAdaJf UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ Magnet Jumpers- amzn.to/2PyKPQZ Alligator Jumpers- amzn.to/2PxqJXn Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V Nitrogen: Uniweld NitroVue Flow Regulator- amzn.to/2GnsaAo Uniweld Nitrogen Flow Meter amzn.to/2brvoBg Nitrogen Regulator amzn.to/2bXdR5f Service Valve & Port Access: RectorSeal Bubble Gas Leak Detector - amzn.to/2ckWACn 25 Valve Cores - amzn.to/2L37UJU 25 ¼” Brass Port Caps with rubber O-rings - amzn.to/2GIOdD2 Brass Valve Core Tool which holds 3 valve cores - amzn.to/2GFEbm2 Valve Core Torque Wrench - amzn.to/2GHiLoD Locking Cap Universal Lock/Unlock Tool - amzn.to/2GGAoVp Locking caps - amzn.to/2GFXZ8A Ratcheting Service Wrench amzn.to/2dGV4Nh Yellow Jacket Sealright 90 Coupler- amzn.to/2LsU1V7 Yellow Jacket 1pk Compact Ball Valve- amzn.to/2uXdF18 Yellow Jacket 3pk Compact Ball Valve- amzn.to/2AiKfQe Thumb Screw Valve Core Depressor with Backseat- amzn.to/2mR0sCL Other tool links can be found in the video description section. Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal- www.amazon.com/shop/acservicetech

[@Smith-qt4us]

Did you go to school to become a service tech or can someone basically become a good tech with on job training and reading?

[@jmc6940]

My grandmother's ac stopped working and she's on a limited income. Your helping me troubleshoot shoot her system......Thank-you for all the great information.

[@Dandalion414]

Wow, so its 7:30PM here in Milwaukee on a Friday and I'm leveling out an AC and straightening up the line set in an older system. Pumped the unit down, blah blah blah, and hooked up the vacuum pump. Now with my fieldpiece vacuum pump, it takes me literally 5-10 min to get down below 100 microns but this time it shot down to 400, so i went and finished up the small work, and when i came back it was at 800 microns. Trying every connection to no avail. Decide to watch your video and just when i was about to turn it off as i thought it was no help to me, BOOM!! the service valve on the high side needed to be tightened a smidgen more. 13 years in the HVAC/ELECTRICAL Field and im still learning things the hard way. But it works for me as ill never let it happen again. Now its at 63 microns!! Thanks a lot.

[@silvioatejedor]

We need gentlemen like him globally thanks Craig

[@acservicetechchannel]

Glad to help and thanks Silvio!

[@hotwort]

I learn something new from every video Craig. Thank you for creating this material.

[@acservicetechchannel]

Thanks a lot Lester!

[@mrgreen2646]

Its been a while since ive seen your videos always learn something new.

[@acservicetechchannel]

Thanks a lot!

[@magzxi]

All these videos are awesome! Very well done and easy to understand. They have helped me grow tremendously as an HVAC tech. Thank you!

[@acservicetechchannel]

That's awesome magzxi!

[@johncote2776]

Great Tips!! I've had these issues in the past and now this information is very helpful

[@acservicetechchannel]

Thanks a lot John!

[@kennethdandurand3472]

I must admit that due to the e-book being unable to enlarge the fonts/pictures, and reading pages 132-136, this is a lot easier.......just sayin! Now, your videos are probably the best of any on you tube. Seriously.

[@acservicetechchannel]

Kenneth, it can be enlarged if you are reading on a tablet or phone with Google Play Books app or Apple Books app, thanks!

[@josephsantos7047]

What a coincidence I’m learning / testing on recovery / vacuum and you post a video on it. Love the channel.

[@Billo1281]

I’ve learned so much from you guys. Thank you so much for all of the free info, that you put out! Much appreciated!

[@scottk0623]

Great tip on the Nylog on the service valves 👍

[@acservicetechchannel]

Glad to help

[@TRICKAIRCONDCHANNEL]

I like the tutorial about AC. Thanks 👍

[@acservicetechchannel]

Thanks Trick!

[@MJ-iy4fb]

Excellent video. Also, I like your website. I will buy your book one of these days.

[@acservicetechchannel]

Sounds great! I would love to know what you think of it after reading it!

[@WillieMakeit]

thumbs up on the Nylog o ring sealing

[@Froggability]

Willie Mallard. Yes Excellent tip. And just as importantly helps stop gas leaking out!

[@natepeterson7145]

This book is great for the price helps me out a lot.

[@acservicetechchannel]

Glad that it is helpful for you!

[@theairconditioningguy]

As always, great info and simple to understand. 👍🏼

[@acservicetechchannel]

Glad to help!

[@juanacosta2788]

Great video I never nkew some of this stuff keep up the good work

[@donaldmckee585]

This will help a whole lot THANK YOU very much

[@acservicetechchannel]

Thanks Scott!

[@SarjanaObeng]

Great video Bro. I need vacuum operation procedure.

[@rodgraff1782]

If possible, always place the micron gauge at the furthest place possible from the vacuum pump. Good video.

[@acservicetechchannel]

Absolutely!

[@JoseGuerrero-sj5ie]

Thank sr. Great video help most on the school

[@acservicetechchannel]

Thanks a lot Jose!

[@DanO181919]

Great illustration and explanation. 👍👍 Will you be writing another book for heating? Thanks!

[@acservicetechchannel]

I would like to in the future, thanks Danny!

[@jimbola77]

thank's partner for sharing! excellent video.

[@acservicetechchannel]

Thanks Jimbola77

[@smilsleatme01]

Excellent video

[@SMDDR]

Had this earlier today, was leaking from my manifold. Make sure EVERYTHING is tightened down.

[@acservicetechchannel]

Nice, thanks Ben!

[@Captain_Kdawg]

Nice video man!! Been doing this a while. I like the tip about nylog in the service valve. I was today years old when I learned that!! 😂

[@patmatt975]

My biggest problem was the feildpiece micron gauge. Even after I bought a new one, nothing but problems. I bought a yellowjacket. No problems.

[@acservicetechchannel]

Yeah you aren't the only one I have heard of with that thanks!

[@powderboy458]

Hi Craig. Love your book and videos. I have a question about what to do when the evacuation procedure isn't performed correctly. Hopefully you can give me some much-needed guidance. I had 3 new name brand AC systems installed at my house yesterday by an HVAC dealer that is a “Certified Comfort Specialist” for this brand. While installing the second of three systems, I noticed that the technician only evacuated the system down to approximately 900 microns (as read on a vacuum gauge connected at the pump, not at a valve core removal tool as you recommend). When the gauge read 900 microns, he immediately shut off the pump and released the charge from the compressor into the system. I didn’t see him charge the first system, but I assume he did that one the same way. When he got to the third system, I challenged him (when he went to shut off the pump when the vacuum gauge was at 680 microns) and I showed him the manufacturer's installation instructions which say to "pump down to 350 microns, close off the valve to the pump, and check to see that the vacuum level doesn’t increase above 500 microns in 1 minute". He responded that they never do it that and that they only pump down to 500microns. When I pointed at the gauge reading 680 microns and said “that’s not 500 microns”, he didn’t say anything and just walked away. After waiting a while longer, he turned off the pump and charged the third system when the gauge was at 680 microns. So now I have 3 systems which weren’t properly evacuated and are likely contaminated with moisture (it was a very hot/humid day and the lines were left open for a long time during the installation). I’m wondering what should be done to correct the problem. This just happened yesterday and I have not contacted the owner of the company about the incorrect evacuation procedure yet since I don’t know what to ask him to do - how he should fix it. I don't expect the dealer to say anything but "it's not a problem". Hoping you can advise me on what, if anything, should be done. Thanks!

[@suspected2957]

That tech was a jerk.

[@drummerdem50]

great channel thanks C

[@acservicetechchannel]

Thanks Drummer!

[@GOODNEWSHVAC]

I am an air conditioner installer in Korea. I'm so curious about the contents of this video. I translated the video through an acquaintance. I want to share with Korean air conditioner installers who work together. Would you give me permission? I look forward to your positive reply.

[@hasanbilal8744]

Nice video sir

[@acservicetechchannel]

Thanks

[@larrycavanaugh7410]

Love your videos very helpful could you tell me should my room temperature match my set temperature on my heat pump . Or will there be a 2 to 3° difference thank you

[@acservicetechchannel]

It should run until it gets to the set temp, then most tstats will turn the system back on within about 1 degree but during that time the temp could have fallen more, thanks!

[@nelsonflores67]

what do you think can be a problem while doing vacuum and having both high and low side connected, vacuum doesn't go under 1000 microns but when the low side is closed it goes to 400 and when i close the high side and open the low side doesn't go down under 800-1000 microns? both condenser and evaporator are new but lines are existing.

[@matthewcalvert7594]

Dude you are awesome!!!!!!

[@YouTubeCommunists]

This seems to happen ALOT in r22 lineset swaps....Ill make sure I flush the lines with nitrogen and flush solvent.

[@betomedina2485]

Mr service tech, I recovered Freon & vacuumed down an existing system. The unit did have a leak before and I found it out per my micron gauge since it wouldn’t pump under 1300 microns I fixed the leak it now goes down, 4:04 I pulled it down to 360 (per my testo micron gauge)as soon as I shut all the valves off the micron gauge rises rapidly. However I did the same procedure on standard gauges pumped it -30 left it over night and it didn’t rise at all. Could this be an issue with my system or with my micron gauge?

[@JasonStJohn-my1cs]

I was wondering where you get the nylog lubricant every time I look it up it comes up with the thread sealer not the lubricant

[@jonathanraul4086]

Ty again nice video

[@acservicetechchannel]

Glad to help Jonathan!

[@juliuscaesar5128]

I am experiencing that every time I finish dirtying the vaccum gauge (supco vg 64) it does not keep the reading, that is, it increases, if I resume the vacuum it returns to the vacuum values ​​but every time it is turned off increases the vacuum gauge reading help

[@Enjoylot]

Best vaccum pump with 12 CFM 2 stage

[@chrisbutler2502]

Hi. I'm using an SMAN480 and I have a question about the vacuum side. When I'm doing a vacuum hold decay test the SMAN displays the vacuum level as well as the change per minute. I would expect the change to be stable and gradually drop to 0 but on a unit I'm working on the vacuum is at let's 350 microns and the change keeps jumping. It varies between +2 and +18 and obviously the vacuum level continuously rises. Is it possible to determine whether it's a leak or refrigerant/moisture boiling off?

[@marceloliveira6014]

Can mix a little be of mineral oil whit poe oil?

[@VinhTran-sh9zv]

Hi everyone. Is there anyone find out there is some oil which comes out the vacuum hose after pump down the split system?

[@scottm3552]

Why is the micron guage have to be on the low side?

[@beentheredonethat7572]

Personally I have the Sman4 & the new 8 cfm vacuum pump & I love them, awesome setup. Thanks for the nylog tip, love it, never thought about trying to rehab a service valve. Usually I just sell em a unit!! lol jk Seriously tho nylog is the shit, I've got my guy's on it too. Thanks again

[@acservicetechchannel]

Glad to help Will!

[@omarperez9633]

Honeywell Building Solutions (HBS) is looking to augment both of its Light & Heavy Commercial HVAC business in the SouthWest area. HBS will be seeking local candidates as a Journeymen Mechanical Equipment Service (MES) or Servicemen MES, who can drive the run home. A Service Foreman Mechanic or Service General Foreman Mechanic role is a future possibility. The Mechanics will work synergistically w/ the Sales personnel to secure Service Agreements and T&M (SPOT) opportunities. Candidate must be well-versed in Heavy Commercial HVAC - such as Centrifugal, Screw, & Absorption Chillers, Cooling Towers, Low-Pressure Steam Boilers, Heated Water Boilers, Heat Exchangers, Pumps, and related equipment for Journeyman Mechanic or Light Commercial HVAC - such as Scroll & Reciprocating Chillers, Boxcar Package Units, CRAC, Built-Up Systems, Humidifiers, Small Boilers, and related equipment for Serviceman Mechanic. The compensation would include Union Wages, Health & Welfare Paid-For, 2 Pensions Paid-For, Training, Additional Fringes vary by the Local. If you would like to be responsible for ambiente changes and be actively involved in these exciting times at HBS, then contact me. Southern Nevada, Arizona, New Mexico, West Texas #Honeywell #HoneywellBuildingSolutions #HBS

[@acservicetechchannel]

Nice opportunity for the right individual!

[@omarperez9633]

Yes, this is an Advanced-Level HVAC Mechanic (Tech) role. It would be a welcome change for someone wanting to change their ambience or for someone that has been wanting to start their own Heavy Commercial HVAC Shop, but that they do not want the headaches.

[@yonofui9682]

Teacher I have a problem with a furnace I knows nothing to do with the topic but I need your advice I had replace the flame censor an the iGniter I checked the 3 censors. An they sound with. Continuity but comes an an like five seconds afther comes off an repites the ciclé over an over can you help me with this what could be causing the problem

[@1mrsleepy1]

Is their an led blinking?

[@yonofui9682]

1mrsleepy1 nop a coworker replaced the control board an is a Goodman same brand as the furnace but the board is newer model could be this the problem???

[@1mrsleepy1]

@@yonofui9682 if not installed properly it can be the culprit, but I'm referring to led light that should be on the CPU to indicate where or at what stage the malfunctioning is happening. Usually when it blinks it's indicating the problem by the number of blinks it blinks. Count the number of blinks than look at your service panel and see if you can match the number of blinks to the panel solution. It's should have a list of procedures to run through.

[@yonofui9682]

1mrsleepy1 the light is on no blinks at all like Normal is giving me no error

[@acservicetechchannel]

Check for clogged condensate drain or clogged tube on the pressure switch or the pressure switch itself maybe. A tech would really need to know more of the measurements and exactly where it stops working in the sequence of operation if its within the sequence or a short in the start wires, thanks!

[@Megacontestsexpert786]

I want to watch your video in Hindi language

[@picturemetrollin2093]

I break my vacuum with nitrogen at least twice to facilitate moisture removal.

[@thomasjones1496]

Service valves are garbage, kind of the way the Industry is going, They ran out of colors

[@Megacontestsexpert786]

I want to watch your video in Hindi language