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Awesome! Finally, someone that can talk you through the whole system and procedure flawlessly and they're easy to follow! Kudos on making a great teaching video where each word is understandable!

Had a System today. 0 superheat 30 subcooling. Had to take out 1lb of refrigerant to get the superheat on point. I always use your chart.

Why go to school when you can just watch this guy's videos? Awesome work sir.

Thank you. After being on the field and shadowing this makes so much more sense !

Finally i understand the super heat

Great video and explanation as usual !!

Thank you for explaining the info. It really did help a lot. Keep at it man. You're the best

So basically you need those fancy tool's 😁 Great video 👍✌️

Excellent vid!!!! thanks, Craig.

Thanks for the effort you're making.learning with you makes me proud.i find it hard to understand all.wanna get rid of the French language.have a nice day.

Hey Craig, can you do a video on how to check sub cooling and super heat on packaged units please

Great video. 👍👍

I am trying to wrap my mind around what is happening to the gas if the SH is way low, I.e. you said "if low to 5 or so, we want to make sure we're not sucking liquid back too the compressor". So that would be overcharged robbing volume? causing a lack of space for expansion to take place?

You guys are the best😊

Is the indoor wet bulb temperature just a reading of the temperature inside the return ? Or is a special tool required to calculate it ?

I have replaced a heat pump compressor(2ton) that had r-22 and i filled it with mo-99... replaced filter dryer, did a nitrogen pressure , pulled a good vacuum... the evaporator is a fur down unit (pancake) i checked both piston... blowers are ok ..the problem I have is that the compressor making a hissing noise, Low side 115 psi , 15 sh , vsat 71.4 , slt 86.3....hi side 168, -OL sc (no subcooling), 85 LSAT , 86.6LLT....had a a/c company called in and said was the valves 🤔 went ahead a replaced it with another compressor same problem no enough super heat/no cooling properly... Did replaced filter from the beginning...coils inside evaporator and condenser clean. I KNOW THERE'S A PROBLEM BECAUSE NO COOLING PROPERLY/HAVE USED DIGITAL AND ANALOG GAUGES BUT DON'T HAVE PROPER READING...I HAVE OVER CHARGE AND UNDER CHARGE IT ON PURPOSE TO SEE BUT CAN'T FIGURE IT OUT....

new subscriber, your video really helps me. better than SJ*C school

Craig, I wish you explained in this video better to its listeners WHY you are checking the WBT in the return at the air handler and not the DBT. So let me explain the missing info. You only check the WBT if the relative humidity is above 70% or below 20%. Anything in between you are to check the DBT at the return.

i just ordered some of those charts !

Great channel Craig, I am a mature student after many years as a plumber and a move from the UK to Australia I have moved onto HVAC, my question. Do you have any plans to do a metric version of the book ?

Great video! Thank you 👍

Great Video. Have a nice weekend . Thank you for sharing ^_^

This is awesome 👌 thank you!

Very useful information thanks dear

Super great!!

GREAT VIDEOS OF YOUR THANK YOU SIR can you do video or share info about which refrigerant is best replacememt for R22 and what needs to be done when replacing refrigerant

What tool are you using for temps?

Exactly where does the psycrometer needs to be place on the evaporator coil to find the temperature can it be place just outside the box

Why were the digital and analog readings so different? Super heat on Analog was 14 and Digital it was 7.5. Why is that?

are those digitals accurate! do u need to calibrate them? thanks.

Would you get the same wet bulb temp reading at the return air vent and in the duct-work??

Can you take the IDWB temp at the main return?

Can you tell me that r134a and r404 gas target superheat chart. -temperature and +temperature are both gas.

I got a question, why are all my wet-bulb temperatures below 49 degrees Fahrenheit. I'm taking my temperature right at my condenser return. Is that not what I'm supposed to take it from ?

I’m fresh out of HVAC school so this might be a stupid question but I believe I heard that if your suction line temp is 65 or above that it’s bad for the compressor or maybe it’s just Copeland compressors?

I have a question if you have a 410a system with a txv and you have good temperatures like say 42 degree evap coil temperature and 11 degree SH and 8 degree SC but have low suction pressure of 95 psi and a head pressure of 305 psi is this a system that has issues like air flow or other problems

Does the digital manifold connect with the job link prob compared to the dual in duct psychrometer?

Do yall have an app

1. how to find target superheat for single split aircond R32 in Celcius 2. do u hv chart for it

Thanks. What happens when a fellow employee insists on charging by sub-cool method on systems with pistons ?

On my old r22 system with a piston, is it true that if the vapor line temperature at the condenser is 41 degrees, (83 dry bulb for what it’s worth) the MOST my superheat can be is 9 degrees or so if my system is working properly? (Since the evaporator coil isn’t freezing, I took 41 and subtracted 32 to get 9). I have two 33 year old Armstrong air units and both work well. Clean coils, good air flow etc. I do not want to hook any gauges to them, there is just no reason. The downside of creating a schrader valve leak outweighs any knowledge I would get, since they are working very well. Delta T indoors is about 19 degrees which is just fine for me. I find this stuff very interesting. Thanks in advance.

👍👍👍

Sir pls do u have a book

Can these two parameters also be used in the AC car service?

Hi Craig, I have a R410a unit - model # YCJD36S41S1, the unit pressure is 175 PSI when the unit turned off, do you know if this pressure is correct? Thanks

Good beard! But! Craig, you are still young. Without it, you will look even better.

I wonder if I could get your opinion on this r410a refrigerant My sub cooling is high, unit calls for 10-12 but it’s 18 (it’s a TXV system) super heat is .8-1.2 Temp split is 18-20 Suction line temp is 38-40 (118 psi) Liquid line temp is 75 (288 psi) Outdoor temp is 77 Indoor temp is 77 Blower is set to 400 cfm, 3 ton Filter, blower, evaporator, ductwork is all clean, all new units installed a few months ago

The cards they sent me have a smudge mark across the 80 degree mark it looks like green paint. I tried to scratch it of but it made it worse

👌

That card your holding.

Gz... HOW LOW IS THE VAPOR LINE TEMP GOING TO GO 😆😂

Flip hot and neutral, please. The fan is blowing in the wrong direction.