Air Conditioner Troubleshooting! Connecting, Measuring, Fixing, Disconnecting!
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- Опубликовано: 11 сен 2024
- In this HVAC Training Video, I Show the Step By Step Procedure for Fixing an Air Conditioner that has a Frozen Suction Line if its not Low on Refrigerant! I Show Manifold and Hose Connection, Measurements, How to Fix the Problem, Taking Measurements Again, and Proper Disconnection from the System. Make Sure You Are EPA 608 Certified Before Handling Refrigerants. We use the new @NAVAC digital manifold! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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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.
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Dude, it is so nice to have somebody do a repair video without shitting on their customers. You got a sub in me. Im a building engineer, but HVAC is definitely my weakest link. I enjoyed eevry aspect of this video
I don't understand what you mean in the first sentence of your comment.
@@realSamAndrew It's a bot. This or DYIIdeas, both have word for word comments.
@@Alex_hvac thanks for the heads up. But that diy comment is only a few hours old and this one is 3 weeks old, so it's likely the new one is the bot. I don't understand what good is the comment anyway, what's the point of the bot?
Guy has the patience of a saint, sign of a very good instructor !!
Thank you so much for your kind words!
@@acservicetechchannelhi may I ask if you guys do house services…thanks
Dude, it is so nice to have somebody do a repair video without shitting on their customers. You got a sub in me. Im a building engineer, but HVAC is definitely my weakest link. I enjoyed eevry aspect of this video
Great video. I am an Electrical Engineer specializing in RF, and I greatly enjoy your videos. I want to be a better informed consumer when it comes to HVAC.
I retired from the trade after many years. I enjoy watching your videos to keep me sharp
Thanks for watching and subscribing!
Steve, you didnt happen to live in SE Portland area and moved to Arizona back in 2017?
@@DayClanTribe not me
Thanks Craig for all you do teaching young and old techs thanks again for the video
Thanks for watching!
Excellent video Craig. I am a TAB pro and you can't imagine how many commercial systems have AF issues. I travel all across the USA doing this for major stores. This is a vital component of HVAC design and TAB of AF. Thanks for sharing!
Good demo…. In my residential experience freezing up is almost always low airflow…. Rarely did I find a low charge causing freezing. A very dirty air filter was the most common reason for low airflow issue
Always go inside and check your airflow first! Always
My second year HVAC teacher used to be the Trane tech rep for the whole state. They found some dusty old neglected books....all about airflow. They made it their mission to teach the new generation the importance of air flow. Calls himself an, 'air-head' quit proudly. But when a job gets tricky....for no seemingly good reason....it's airflow. Could be duct design flaws, could be debris, could be fan speeds. But it's a whole dimension of HVAC that seems the most neglected.
@Niveous23 One of my all time favorites is when we went on companies jobs where duct work was undersized.. I would see ONE 4 inch return for THE ENTIRE 2nd FLOOR of a home with a upflow gas furnace in the basement. Then they wonder why it is always hot upstairs ? Saw a lot of this on 2 story Cape Cod homes in New Jersey
Good job as always man. The way you fixed the airflow was good. If you can show a video on one of the new carrier dip switches, the Lennox, the more new furnaces because a lot of people get confused with reading the manuals. Great video man,this will show a lot of newbies to the trade to not just add refrigerant and leave!
Amazing instructor, patient, knowledgeable, and all done very well.
I really enjoy your videos. They are very informative and helpful. Keep the coming!!!
This is why I always check filters and indoor and outdoor fans before even putting gauges on a system.
Once again a great demonstration of using true grid and gauges properly. ty so much
Thanks for watching!!
Thanks for these vids man, I'm currently working medical records and trying to bring more value in my life with learning this trade. Just passed my epa608 universal exam. I appreciate the way you teach. On my way up hopefully. Peace!
Thats awesome!!! Keep pushing forward and learn as much as you can!!
Thanks for all the info, you’re the best. You make it so easy to understand what you are explaining.
Craig Thank you again for another great video something i can show our new apprentice so he can better understand the way u teach is amazing I really appreciate you and all you do keep it going my friend 🙌👍
Thank you for watching and for using my videos to help teach new apprentices!
I see all the new Navac equipment in your demo. What’s your take on them vs Fieldpiece ???
Nice video as always.
Had a maintenance guy at an apartment complex add an additional 3 lbs of refrigerant before even checking the airflow. Went there and found unit shutting off on high head and a clogged air filter😆
Those valve caps with a hole in them are brilliant.
Great way to test schraders without getting water and soap in the service ports!
ABC. Airflow before charge. Check static pressure (after thawing coil if needed) and compare to blower table to ascertain cfm. If airflow is good, ascertain whether it’s low charge or perhaps a liquid line restriction.
Excellent video, I'm not nuts about the gage set you are using. Thanks for the video.
Very explanatory and informative video thanks sharing the experience and knowledge thanks
Very good video as you always do Craig, I would like to see videos on RTU units from you and thanks for sharing knowledge 👍.
I’m a commercial hvac tech since 1994. I have swapped out 10 and 20 ton compressors and had to swap oils. Every single rep I have talked to said the same exact thing about contaminants between the different oils saying just dump it and refill with new. I have never had a issue with contaminanting system so I absolutely don’t believe that hoses can do this.
Dude.. It finally hit me you sound exactly like senator Jim Jordan who i absolutely like alot.. Love your teaching as well!!
the best instructor ever, thank you Craig for your efforts, god bless you
Thanks for watching!
Great job and video Craig. Thank you for the knowledge.
This video helped me so much, I’m an apprentice in my first year and I love it so much, you explain so well and it helps.
Thanks for watching, I hope things are going well with your studies! If you want to learn more, check out the free articles and quizzes we have on our website, acservicetech.com!
Ahh i like that you changed out the fan speed settings, nd tonage on the board . Thought it might have been the dip sw config.
Props to you on the approch method as well with line temp minus sat temp for your sub-c /supr-h
This was another fine video craig you made for us guys in the field.
We all do appreciate it very , very much
Sometimes not all the time ill bleed my lines back into unit , nd sometimes ill leave my lines full . Thanx again this was my weekend off 😅
Awesome video. Great info and explanations. I like that gauge set
Another excellent educational video. Thank you!!
This is all good an all but I’d say maybe 85 to 90% of all techs don’t have these instruments and time on a service call to do all this but is very informative to know what to look for when gushing up on a system what to look for that I like a lot 😊
Can you do videos about VRF and VAV and terminal boxes for those of us who do commercial hvac
Thank u so much for the video…it’s very useful and informative.
Cheers from algeria👍Thanx for sharing
Thanks for watching!
I like that control board haven’t run across one like that yet.👍
Best demo one has seen!
Thanks for watching!
Hello, Craig, please make a video of why the liquid line may sweating in cool mode. I have a real weird case of replacing a 10-ton Carrier condenser. The temperature of the liquid line is below the ambient temperature, it’s about 70f from the exit of the condenser up to the coils. But it’s only sweating inside of the house. Across filter drier no temperature drop. Suction pressure 110psi. SH 10, SC 0, if adding more refrigerant, suction line starts freezing. I’ve insulated the liquid line for now but I want to fix it the right way. Thank you for your videos.
Would love to see a video about scenarios that arise if you work on the wires for an ecobee while the 24v circuit is live. Had a few installs where the 24v fuze went. Ecobee was never on the wall tho and looking back, almost every time it has been the fuze which wrecked out or the ecobee after pressing it onto the wall plate. Hopefully Craig can save the day on this LOL.
I like that airflow device and app!
Had a lady set her laundry basket in front of the filter return. She would move it during a service call but place it right back. Being a hard headed tennant my only option was a pressure switch and delay on break.
Good job 👏 well explained 👏 👍
Do you have a video that talks about the different options/settings on the control board? Also is there a cheaper option to test air flow?
소중한 영상 고맙습니다
Would be nice if every work space was this spacious.
What about doing a little purge right before snugging the fitting to get rid of that small amount of air? Also, Those gauges are really nice for the price vs. Fieldpiece, how have they held up?
Great video. You are awesome. I bought your book 😀greetigreeting from Austin,Tx!
Thank you for watching and for picking up my book!!
thank you so mach you are the best teacher
I really appreciate your explanation and your so knowledgeable thank you for your expertise..
Thank you for watching!
Craig couldnt a wrong direction blower wheel also cause this low air ?
Absolutely. Most any anomalies to the indoor system will affect airflow.
Dirt buildup on the blower wheel is a pretty common issue.
Appreciate the video 🔥☝️
Thanks!
I had this problem a few weeks ago , finally got it fixed.
I always thought HVAC systems were the machinations of dark magic. Yep, I was right😁
Excellent...a real professional!!!
Thank you! Cheers!
Great video, very informative !
Another great video. Thank you, Craig. It’s a demonstration that TXV can handle some airflow differences but not this extreme. Do you think that TXV can handle up to half ton mismatches in condenser and evaporator coils?
I purchased your books for the learning and to show my support. Do you also accept donations through PayPal?
1/2 ton oversize shouldn’t be a big issue, but 1/2 ton undersized evaporator, and you will have issues even with a txv. Unless the compressor can compensate for the heat reduction, you will get slugging with a txv.
Why don't you evac the line set with a vacuum pump instead of blowing out refrigerant.
Is the card information also inside the book already? or am I required to purchase both? because they cover different subjects thanks for sharing.
Good job great video thanks
How do this manifold gauges compare to testo and fieldpiece? Great video as always.
Are you going to make a review about that NAVAC NX1 digital manifold? I don't think anyone has made one yet.
You are the best 🙌🙌🙌🙌
Hello, can you please record one video with full instructions (proper procedure) for filling mini split system witch was fully discharged (example - damaged piping). Is it proper to open valves and do necessary vacuuming including compressor side. After that, filling with proper weight of gas into the system - usually written on the device. So, mini split inverter with R32 gas. Or...you already have such video. I couldn't find it.
Thanks
Thank you a lot 👍🏼
ABC. Airflow Before Charge.
Good video
Quick question a carrier unit at the condenser the suction line isn’t sweating it’s getting cold but not sweating like the unit right next to it they have two units for the house. The capacitor is a 35/5 and the micro fareds after testing is 29 on the Herm but the compressor is on and is not humming. I’m suspecting low refrigerant but the ambient temps inside the house is 76 degrees and the T stat is set at 73. Could a cap that’s lower than its 6% capacitance cause this or is it just low refrigerant? I’m going to buy some digital gauges to have to check pressures and all that but I don’t work for a company I did graduate the course with a degree in refrigeration but I just do small troubleshooting on the side in the neighborhood. Just getting info on other things to check the condensate is not clogged and the air filter is clean.
You said low airflow with txv would still have a normal superheat. Before you changed fan speed, superheat was at 20 afterwards it was 15.3. I apologize, I'm confused.
If the airflow is maxed out based on the fan, could you limit the maximum output of the outdoor unit to solve this problem to say 50%? (trial and error to determine maximum). Is it as simple as saying if the evaporator is below freezing temperature, you will have issues?
I love your teaching, do you have a video dedicated to airflow diagnostic and troubleshooting ?
We do! Watch these videos here!: ruclips.net/video/CLRMISQCg0A/видео.html & ruclips.net/video/zOd2G10F-YY/видео.html
I like that style unit simple
This is an awesome explanation. Too fast paced for my mind but that’s why I keep playing back so the message can sink in. I got Craig’s book and workbook as well. This explanation also is way better than the ones I have learned in HVAC classes. Thank you Craig!
Thanks for watching and for picking up my books!!
My next purchase will be the your handbook and workbook for mini-split! Thank you so much. You are the master of this trade!
Craig I work for the government doing HVAC. I do not own personal gauges. Do you recommend wireless or manifold?
Nice work 😎
Hi Craig. I have the same pressures and temperatures, but i noticed that the pressures don't equalize when I turn the unit off that to happen when the txv valve is bad. Hi side remains hi and low side remains low.
Thank you
Hi mate I have a Panasonic CU-Z24RKR. I need to disconnect, and shift appropriately 9 mts. Do you have a wind down procedure to push the gas into the unit? Can I use mechanical fittings to add tube length? Rather than weld? What is the best and cheapest tool set to vac and release the gas back into the system once moved? Appreciate your response🎉
You have to have that true flow grid for the app to work properly?
Veo que se utilizan las mangueras de los manómetros solo purgando el gas, esto no contamina o mete humedad al sistema?. Porque veo que se hace critica a las personas que no hacen vacío profundo al sistema cuando se instala un sistema nuevo o se repara. No es lo mismo no hacer vacío y solo ingresar gas para sacar el aire y una poca de humedad a no hacer vació a las mangueras de los manómetros cunado se utilizan?
Your videos keep getting better, even this far along! Love the trick about getting the charge from the gauges back into the system, especially important with micro channel. Of course, I would recommend wireless probes(Joblink are my fav), but not everyone has those.
Thanks for being a long time watcher! 👍
Good morning Craig.
Do you prefer thermistor clamps or thermocouple clamps?
Great video
Lately ive been been running into 20 seer+ inverter split systems like goodman, carrier,lennox and trane. Is there any error code training we can do craig!
Ty!
Good info but you def dont purge your hoses enough. That short burst of vapor wont make it through your manifold and both hoses. Now if you add refrigerant your also adding the air left in your rig, even if you dont add any refrigerant, when you go to disconnect and charge your liquid back into the low side youre adding air at that point. So many contaminated systems out there from improper manifold practices, probes eliminate the risk when used properly.
That’s a 4-10a pressure low side and high side supposedly be
Quick question why did you have a high superheat with low airflow?
Wondering this as well
When you fed in the refrigerant from the high side hose back into the low side at the end, wouldn't opening the valves on the manifold push refrigerant from the low side into the manifold?
Pressures will equalize. High pressure will feed the lower pressure side.
Think about it.
The manifold represents whatever service valve is open, if you open the low side valve, that pressure around 120 fills the manifold chamber, then he cracked the high side valve, bleeding the higher pressure liquid from the high side into the manifold chamber, and drawn into the running suction hose. Once both sides are equalized, he has transferred as much refrigerant from the hoses as possible, hen he closed the low side service port, and disconnected the hose from the suction line. Then he bled off the “deminimus” remaining pressure from both hoses.
I think I understand it. I forgot that the unit is on and that's the suction line so it's going to be sucking in any vapor liquid from the service port.
I have a problem that maybe you could trouble shoot?
The coil above the filter freezes up if I try to run the A/C too cold.
How cold should I be able to set it before this happens?
Hi, would low air flow also cause the suction line temp to be very low as well? Maybe 30° suction line temp.
Thanks..❤
Very nice my friend
The problem with that CFM flow device is that you had to remove the filter to test it so you're not really testing what the actual CFM on the system is going to be. As soon as you add that filter you may have went from 3 tons to 1 1/2
The tool and app incorporate the static pressure measurements of with and without the filter to extrapolate what the cfm would be with it in. That's why there are two measurements in their program to find airflow.
Airflow first always
According to Panasonic Sevice Manual
CS-S28MKQ CU-S28MKQ (Inverter EEV metering device) 79 PSIG is normal for low side 30 meters line set with outdoor temperature of 95 degrees. Why is it not freezing?
The first thing that popped into my mind when I saw that frozen suction line was a dirty filter.
How do you know if you've rid of the air out of the system? I didn't see anything come out except air.
What about too high airflow setting for blower motor?
where did you get that cap for leak testing?