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
@@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?
@@acservicetechchannelhi 👋 why is my house 🏠 smelled like a rotten dead body when I walked 🚶♂️ in is it has to do with refrigerant antifreeze leaking 😢
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.
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
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 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
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!
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!
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 😊
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!
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😆
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 🙌👍
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!
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 😅
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!
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.
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.
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.
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?
My recommendation for those new NE florida techs specially new construction. 1.make sure your king valves are all the way open 2.air filter is clean 3.make sure your thermostat and condenser wire isnt switched up (since green isnt used coming from condenser) 3.5.Youre blower kicks on (jump G terminal with your alligator jumper to R) and the bolt is tight to the blower motor shaft 4.your air handler door is on 😂 5. If its still freezing up well make sure your txv is not freezing up (stuck close) usually itll go to pump down or stay at a crazy pressure like 50-80psi lets say 80-100f hot day :run it heat for 20 mins so it can unstick making it open up) 6. Your thermostats are calling and dampers match thermostats zones..and see if your dampers are fully open or closed when needed to.and bypass click on motor is clicked on well ( if it isnt all the extra air will go back to the evap coil freezing/choking the coil up or overheating the system in heat mode(winter time)
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.
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.
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.
Are NAVAC digital gagues any good? They seen to cost a little less than Testo and Fieldpiece, but sometimes paying less costs you more. What brand of digital gague do you guys recommend? More importantly, what brands should I avoid at all costs?
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.
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🎉
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.
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
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?
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.
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!
You can save A LOT of time by asking the customer how things were working in the months leading up to the issue. Then you discover they bought a new couch and plopped it right in front of their main return.
That’s a dirty coil, filter, or TXV acting up all day! But a goober with gauges and gas will over charge that every single time! Also, always start with your thermometer before putting your gauges! 16-20 degree delta is your standard operating range, if you are too much higher than 20 it’s an airflow problem, below 16 it a refrigerant side problem. It’s that simple, your thermometer is your stethoscope, your gauges are your EKG! A doctor will never give you an unnecessary EKG before using the stethoscope, although now that we have probes and not always hoses, taking pressures all the time is not that big of a deal except with respect to time.
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
@@acservicetechchannelhi 👋 why is my house 🏠 smelled like a rotten dead body when I walked 🚶♂️ in is it has to do with refrigerant antifreeze leaking 😢
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
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.
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
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
Thanks Craig for all you do teaching young and old techs thanks again for the video
Thanks for watching!
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
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!
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!
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 😊
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!!
Amazing instructor, patient, knowledgeable, and all done very well.
This is why I always check filters and indoor and outdoor fans before even putting gauges on a system.
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😆
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!
Dude.. It finally hit me you sound exactly like senator Jim Jordan who i absolutely like alot.. Love your teaching as well!!
I really enjoy your videos. They are very informative and helpful. Keep the coming!!!
Thanks for all the info, you’re the best. You make it so easy to understand what you are explaining.
Those valve caps with a hole in them are brilliant.
Great way to test schraders without getting water and soap in the service ports!
Once again a great demonstration of using true grid and gauges properly. ty so much
Thanks for watching!!
Great video! ABC - Airflow Before Charge ❤
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!
I see all the new Navac equipment in your demo. What’s your take on them vs Fieldpiece ???
Nice video as always.
Excellent video, I'm not nuts about the gage set you are using. Thanks for the video.
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 😅
Always go inside and check your airflow first! Always
the best instructor ever, thank you Craig for your efforts, god bless you
Thanks for watching!
Very good video as you always do Craig, I would like to see videos on RTU units from you and thanks for sharing 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!
Very explanatory and informative video thanks sharing the experience and knowledge thanks
Thanks so much man, you are helping me out for my next heat pump test
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.
Awesome video. Great info and explanations. I like that gauge set
Great job and video Craig. Thank you for the knowledge.
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.
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.
Great video! Thanks for the effort you put in each video! We appreciate you!
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?
Plz do more services using the Navac Digital gauges
Another excellent educational video. Thank you!!
My recommendation for those new NE florida techs specially new construction.
1.make sure your king valves are all the way open
2.air filter is clean
3.make sure your thermostat and condenser wire isnt switched up (since green isnt used coming from condenser)
3.5.Youre blower kicks on (jump G terminal with your alligator jumper to R) and the bolt is tight to the blower motor shaft
4.your air handler door is on 😂
5. If its still freezing up well make sure your txv is not freezing up (stuck close) usually itll go to pump down or stay at a crazy pressure like 50-80psi lets say 80-100f hot day :run it heat for 20 mins so it can unstick making it open up)
6. Your thermostats are calling and dampers match thermostats zones..and see if your dampers are fully open or closed when needed to.and bypass click on motor is clicked on well ( if it isnt all the extra air will go back to the evap coil freezing/choking the coil up or overheating the system in heat mode(winter time)
I like that control board haven’t run across one like that yet.👍
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.
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 for being thorough and detail.
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.
I like that airflow device and app!
How do this manifold gauges compare to testo and fieldpiece? Great video as always.
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?
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.
Best demo one has seen!
Thanks for watching!
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 👏 well explained 👏 👍
Cheers from algeria👍Thanx for sharing
Thanks for watching!
Excellent...a real professional!!!
Thank you! Cheers!
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😁
I really appreciate your explanation and your so knowledgeable thank you for your expertise..
Thank you for watching!
Are you going to make a review about that NAVAC NX1 digital manifold? I don't think anyone has made one yet.
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.
Great video, very informative !
소중한 영상 고맙습니다
Are NAVAC digital gagues any good? They seen to cost a little less than Testo and Fieldpiece, but sometimes paying less costs you more.
What brand of digital gague do you guys recommend?
More importantly, what brands should I avoid at all costs?
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! 👍
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🎉
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.
Very nice teacher
Good morning Craig.
Do you prefer thermistor clamps or thermocouple clamps?
You have to have that true flow grid for the app to work properly?
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.
Well explanation bro
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 so mach you are the best teacher
How do you like the navac gauges and electronic clamps? I’ve been thinking of getting them myself. My field piece gauges is on its last leg.
Quick question why did you have a high superheat with low airflow?
Wondering this as well
Craig I work for the government doing HVAC. I do not own personal gauges. Do you recommend wireless or manifold?
Good job great video thanks
Appreciate the video 🔥☝️
Thanks!
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?
Nice work 😎
The first thing that popped into my mind when I saw that frozen suction line was a dirty filter.
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.
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!
Good video
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
You can save A LOT of time by asking the customer how things were working in the months leading up to the issue. Then you discover they bought a new couch and plopped it right in front of their main return.
You are the best 🙌🙌🙌🙌
Great video
That’s a 4-10a pressure low side and high side supposedly be
Thank you a lot 👍🏼
That’s a dirty coil, filter, or TXV acting up all day! But a goober with gauges and gas will over charge that every single time! Also, always start with your thermometer before putting your gauges! 16-20 degree delta is your standard operating range, if you are too much higher than 20 it’s an airflow problem, below 16 it a refrigerant side problem. It’s that simple, your thermometer is your stethoscope, your gauges are your EKG! A doctor will never give you an unnecessary EKG before using the stethoscope, although now that we have probes and not always hoses, taking pressures all the time is not that big of a deal except with respect to time.
Hi, would low air flow also cause the suction line temp to be very low as well? Maybe 30° suction line temp.
I like that style unit simple
where did you get that cap for leak testing?
Do you like those gauges?
They are quite nice!!
What are the best digital gadgets a2l compatible thanks
Very nice my friend
ABC. Airflow Before Charge.