THEY SAID THE AC THERMOSTAT WAS BLANK

[@russellbarnes7732]

Man you're very last sentence be kind to one another Was totally worth watching this entire video just to hear you say that. I wish you were my relative that way I could call you up and we could just talk about fun stuff. Thank you.

[@russellbarnes7732]

Man you are really good at what you do you got this thing down. It's really exciting to see people like yourself intelligently speak about their craft

[@loukenstein3569]

I recently started as a helper for a supermarket refrigeration company and man is there so much to learn. Hearing your insight and learning from how you or others think really opens my eyes to the trade. What a treat to get to learn from these incredible videos. Thanks a lot for these amazing videos and be safe! Keep up the awesome work with these.

[@jasonjohnsonHVAC]

This job was big picture diagnosis......big dollar repairs. Great job as always Chris

[@russellbarnes7732]

Oh my gosh dude that little nuance of spraying the big blue and a slow stream is so very important.

[@mrbyamile6973]

No kidding, was just telling one of my guys to keep the stream nice and steady and low pressure. Didn't matter, the guy just went to town spraying at high pressure stream causing some bubbling. Just shook my head, some guys just don't get it.

[@russellbarnes7732]

@@mrbyamile6973 🤣🤣🤣🤣🤣🤣🤣🤣

[@Helsingborgare90]

Im just done with school and starting next wendsday at a company doing mostly "store cooling" as we say in sweden. Like supernarkets, bigger and smaller. But it's VERY diffrent to watch your videos compare to the units we got over here in sweden. We got mostly CO2 in supermarkets nowdays, some R290 and some Other stuffs not updated. Talked to some guys at my practice and they Said the stuff they see in your videos is what we had over here 20 years ago. Im doing this career change pretty "late", im 32. But im really excited for it. Btw, you seem like a very Nice guy. Keep up the awesome work and attitude!

[@petermichaelgreen]

I wonder what things are like further south in Europe, my understanding is that CO2 is a great solution for colder climates, but not so good for hot climates because refrigeration processes get more complex and less efficient when the working fluid goes supercritical

[@prophetfgsm]

422D can be converted without changing the oil in some cases, Honeywell has information about it. For cuircuits 6tons and under you can use Diversitech superchange and go to 407C. I haven't used it yet but I do have a can on the truck to quickly change over a unit as a test comes summer.

[@pineychristian]

I've been staying away from 422D. The capacity lost is higher then another retro refrigerants. Especially when you can't afford to lose much capacity on a unit.

[@ATSNorthernMI]

Looks like its placed on a kitchen surface. Kitchen surfaces have to be washed and sanitized regularly. I don't think they are wise enough to not get chemicals into the stat but looks like to me its exactly what they did. What the funny thing is that it would cost too much money to have you pull back the thermostat wire and locate it to another surface which is probably more difficult and tedious that just replacing the stat every time it comes in contact with sanitizer. Maybe they don't do enough cleaning routines to the kitchen and this doesnt happen enough but when I worked in a kitchen, light switches that were washed all the time started to fail which you're not supposed to wash a switch but the cleaning process just lets moisture in there and it just destroys the electrical connections.

[@pineychristian]

Chris, Totally agree with your call on this one. I have had no luck with helping customers out by topping them off to get them by while they decide on repairing unit. Time will go by cause it's working pretty good now by topping off 2 circuits and they won't repair it. Then another compressor will lay an egg and then you get called back out for no cool. The estimate will be even higher. So I agree with your decision. Make them repair it right 👍😉

[@russellbarnes7732]

This particular video and your comments has been a huge inspiration for me to really do better

[@nightone9720]

Ya know sometimes us HVACR techs get burnt out from time to time. Every single time I get burnt out I just watch a bunch of Chris's videos and then I get that spark back in me and get excited to go to work the next day.

[@zachstammen9337]

As someone who works in the industry I have found Lennox and Trane have the worst lead times on their equipment, saw almost a 6month lead time for a 10ton Trane packaged unit. It seem carrier isn’t as bad with their lead times for their equipment.

[@jasonjohnsonHVAC]

Yup, we have some 20 and 30 ton units to replace. They quote us at 35 weeks lead time

[@randomrazr]

is the big box thing on the roof, thats an entire air conditioner unit?

[@natepeterson7145]

Carrier inducer for residential furnace has no ETA at the moment.

[@randomrazr]

whats a "good brand"

[@jphvac5725]

@@natepeterson7145 yep. Took almost 8 weeks to get a couple carrier inducers I ordered. Just got them about two weeks ago.

[@wonderhomie2011]

Great troubleshooting tips. It’s very hard now to get a new unit. I deal with carriers and it’s a 90 day lead time to get RTUs. Sounds like this brick will have to limp along for awhile till a new one is available. Can’t imagine repairing it but this are different times we live in now.

[@nnethson]

I love your explanations gives me perspective.

[@johnwalker890]

I'm interested in those stickers for sure. Good job Chris.

[@russellbarnes7732]

A debate about pressure and temp. Excluding pressure drop created by piping, coils, etc. In the running mode, pressure does not drop between the hot gas and the inlet of the txv. I debated with people on this subject many many years ago. What they believed was because the condenser took heat away then the pressure would be dropped significantly after it went through the condenser coil and to the TXV.

[@terminator761]

Had good succes with 422D it works really good as a drop in, so far the units ran with it fine.

[@Viesta]

i see he got a new tablet... looks a lot bigger and overall nicer... trying to debate on if it's an OLED or not.

[@HVACRVIDEOS]

It's the new Samsung Tab 8 ultra... it's awesome but they don't make otter cases for them yet...

[@Viesta]

@@HVACRVIDEOS "Super AMOLED, 120Hz, HDR10+" is the display specs which is insanely good... and im presuming really expensive so be careful with that lol

[@kittyztigerz]

that mark was 2 years agos i remember watching your video before n you said i dont think customers going do anything to this ac unite until 2 years later they called you up about it

[@adrianperez5628]

Go to Chatleff TXV’s, if you need help finding the Male Chatleff - let me know. I do this regularly. I also do 7/8” Rotolock Filter-Driers at times.

[@thesilentonevictor]

Great job Chris on this unit

[@thesilentonevictor]

My question would you change the coils and txvs and dryer and add freon an call it a day 🤔

[@timcastilo6962]

I would quote with 422D or 422B. Works with mineral oil and have almost identical pressures to R22. I use alot of 422D cause it's what my favorite supply house stocks but they say 422B is best for air conditioning.

[@grubba140]

You may have discussed them before but can you point out and just talk about a Variable Frequency Drive in your next video or point me to a video where you do discuss them? If the units you work on do not have them then I understand but iv been learning alot from your videos as well as being in school for HVAC/R. Thank you and I appreciate your work

[@hvacmisadventures]

In KZbin search type in "HVACR Videos VFD" and 2 of his older videos pop up that have a few things about them. They're not long videos and I don't remember them having a huge amount of info about them but definitely enough to get your feet wet. I'm firmly rooted in NC right now but I would give up a lot to be able to go work and learn with Chris man. His videos have been so instrumental to my HVAC career. Idk how many you've watched but Just start at the beginning and watch all of them regardless of what you do in the trade. I usually try and test myself and diagnose along with him. But watch the 2 videos that pop up, that should get you started

[@justynj728]

HEY CHRIS, QUESTION. WHICH MILWAUKEE BLOWER DO YOU USE ? They Make a smaller one and the bigger one which is the fuel.

[@ICountFrom0]

Have you ever sent one of these vidoes with an invoice, or had a customer find a video of yours about the work you've done on that location? How did they react?

[@BeezyKing99]

The original T-stat got splashed, which you could tell by the obvious stains on the LCD.... a big droplet probably made it's way through the holes in the rear on the top.

[@russellbarnes7732]

I respectfully disagree with that unless you can tell me otherwise or help me understand that you do not want to measure subcooling off of the pressure reading on the discharge side. If the discharge pressure is 200 and the liquid pressure is 185 that's reflecting pressure drop. It's the 200 PSI that you want to grab the saturation temperature subtract that from your liquid line temperature to accurately get your subcooling number. Your thought? Maybe I totally misunderstood what was said

[@hvacmisadventures]

We use sub cooling to tell if we are sending a full line of liquid to the metering device. The liquid refrigerant is sub cooled below its saturated temperature. The discharge line is hot gas coming out of the compressor. It is a high temperature vapor - that is why we don't want to take measurement there. Sometimes you have to because there isn't always a pressure port on the liquid line

[@pg_usa]

You told good things!

[@russellbarnes7732]

This is so much fun watching you do this video I kind of wish I was there but I guess I am sort of kind of cause I'm watching it

[@jyama537]

Brave man! No case for that nice ipad

[@HVACRVIDEOS]

I just got it and it's so new they don't make cases yet... im walking on egg shells with it... its the new Samsung Tab 8

[@MichaelMantion]

What did they go with

[@gnuheidix]

Such a large tablet with so much potential to enable you to read all numbers from a distance. The numbers are tiny and hard to read. :( Great video as always, thanks a lot :)

[@dalza_uk9424]

Quick question, R22 has been banned in the UK for many years now. Can you still obtain R22 in the U.S ? Ps love the videos, so thorough and informative 😎👍

[@EverythingisFire]

It should be completely phased out so R22 can't be manufactured or imported. There's still units like this one in the vid that are running R22. You can still use reclaimed or old-stock R22 (Which should cost a lot), retrofit the existing unit to a different gas or replace it entirely.

[@lexmarks567]

@@EverythingisFire R22 cannot be manufactured or imported but we have a stockplie of it to last for years but has supply starts running low the price goes up.

[@dalza_uk9424]

@@EverythingisFire thank you for your reply, that all makes sense. R22 was phased out early 2000’s in the uk if l remember correctly long while ago. I see the engineers in the states coming across quite a bit of R22 kit so l was curious.

[@mrgreen9086]

I've noticed that some packages unit don't always have liquid line service ports had a york that didn't have one. Would getting a temperature at the middle of the coil get you an accurate subcooling?

[@hvacmisadventures]

The ultimate way to tell if the system is properly charged in this case would be to "weigh in" or weigh the amount of refrigerant you remove from the system. What I usually do on RTU's with no liquid line port is make an educated estimate (guess lol). Generally speaking you'll see something like a 25-35 psi drop from the discharge line to the liquid line. So get your discharge line pressure and I usually subtract around 30 psi from it (we work on a lot of carrier roof tops) and then convert that to your sat temp. So if we have r-410a Discharge psi - 350 Estimated psi (for liquid line) - 320 Sat temp at 320 (r-410a) - 100.5 degrees Liquid line temp - 92 degrees 100.5 - 92 = 8.5 degrees of subcooling Please don't use this as an accurate # ... it just helps with diagnosis if you suspect charge problems Best to weigh the charge. If you are working on the unit and have the refrigerant out of it then add a port to the liquid line for future use. Edit to say: I said i usually subtract 30psi but I think the actual drop is usually less when I've checked my method on systems with both ports on discharge and liquid lines. Just be careful using this method. It can help a lot but I don't want someone to mistake it for an accurate reading

[@HVACRVIDEOS]

I will discuss this live on KZbin this evening 3/14/22 @ 5:PM (pacific) come over and check it out kzbin.info/www/bejne/Y4KYdayXZdyWras

[@hvacmisadventures]

@@HVACRVIDEOS excited to check it out. Probably should have added My goal was to stress that it's a good diagnostic tool but obviously RTFM and the way that manufacturer wants the system charged. Not every system has a TXV (good ole carrier accurators) so stuff like that can be a good diagnostic tool but never a substitute for proper trade practices

[@anthonybabb5700]

I see a new toy in the form of a tablet nice one too guess the old one was getting to be to slow?

[@CyberlightFG]

In what ballpark is the price of a new unit including installation? How much is power in your area? Why doesn't the customer clean the unit themself? Changing the filter and washing the filters seems very easy to do.

[@etherealrose2139]

Corporations tend to get better deals farming out work. They also don't want the liability of fucking up a system by using a minimum wage employee or having them fall off the roof and pay millions in disability when they can hire a company with trained technicians and their own liability insurance to do the job.

[@CyberlightFG]

@@etherealrose2139 If they only stick new filters in a totally dirty unit, it's worthless. I wouldn't pay anyone to do that.

[@russellbarnes7732]

Yep the air probe comments are spot on

[@russellbarnes7732]

By the way you don't have to answer any of these questions I get on to something and I just ramble on ramble on but it's all in good spirit. If I didn't need money to feed my family I would do this business for free that's how much I love it

[@restaurantrepairs]

Do you order your metal mesh filters locally ? I’m struggling for a provider here in GA

[@jasonjohnsonHVAC]

How is the commercial/ industrial pay in GA. TN and GA are 2 states im interested in moving to

[@restaurantrepairs]

@@jasonjohnsonHVAC It’s not California 😂. If you do refrigeration / commercial you’re golden. There’s really limited providers that offer much more than basic hvac service. Huge difference is TN has no state income tax.

[@jasonjohnsonHVAC]

@@restaurantrepairs thanks, i appreciate the feedback

[@shine-cg9uf]

Whats ur cut off discharge temp ? Thought 225 temp was danger zone ?

[@HVACRVIDEOS]

I will discuss this live on KZbin this evening 3/14/22 @ 5:PM (pacific) come over and check it out kzbin.info/www/bejne/Y4KYdayXZdyWras

[@shine-cg9uf]

@@HVACRVIDEOS ok thanks. Keep doing what u do. Extremely helpful thanks.

[@russellbarnes7732]

I grew up with site glasses and I think you said this was R22 and I never really used sub cooling very often I just checked the SG to see if it was low. So I am assuming that since circuit 3 has a low sub cooling that's why you're declaring low charge

[@hvacmisadventures]

I replied to you in another comment but respectfully it sounds like you're having some trouble with subcooling (sorry if I am not correct in saying that) - so let me see if I can help. Sub cooling is used to tell if we are sending a full line of liquid refrigerant to the metering device. Sub cooling happens in the condenser where the refrigerant condenses into a liquid and then cools below it's saturated temp. We use the sat temp - line temp to get subcooling. This system has a TXV which will regulate super heat if it is working properly - because of this we cannot use super heat to accurately tell if the system is properly charged because the TXV will try to regulate the super heat no matter the conditions. We can use super heat as a diagnostic tool and it should still be looked at but sub cooling can tell us if we are feeding the metering device properly. It is the temperature that the refrigerant "actually" is vs. what the temp "should be" according to the pressure (saturated temp). There is a pressure drop (as you were thinking in your other comment) because the refrigerant runs through the condenser first so due to the cooling and condensing of the refrigerant and the amount of space it has to travel it experiences the pressure drop. To measure sub cool we take the pressure at the liquid line (the sat temp that the refrigerant would be at) and the line temp (temp refrigerant is actually at - cooled below the sat temp) and subtract the 2 values. I hope this helps and doesn't come across as condescending. If you already knew this then hopefully it can help someone else!

[@russellbarnes7732]

I need to send this video to R crew.

[@brandoncherry1651]

My heads spinning this guy ac scientist...

[@patrickhutchins6935]

9:00 you said liquid line surface temp but the chart you were referencing lists liquid line pressure?

[@HVACRVIDEOS]

That chart tells you the recommended system pressures and it says if the pressures are close than to dial in the charge using the approach temp

[@patrickhutchins6935]

@@HVACRVIDEOS thank you for the reply and the video; I try to do my due diligence before asking questions but it is hard to find Trane and Lennox info for an outsider

[@HVACRVIDEOS]

All good bud, glad to help

[@spezidrohne9580]

New tablet?

[@JjMn1000]

Cool vid! Interesting videos.

[@mick2171]

Nice tablet man

[@CryptoAbe]

Rs44b does not require oil change. I don't touch 407c.

[@LordomusPL]

Somebody got themselves a brand new spanking tablet!

[@HVACRVIDEOS]

Yeah now I need them to hurry up and make an otter case for it...

[@LordomusPL]

@@HVACRVIDEOS Spigen Rugged Armor pro is available for s8/s8+/s8U. Urban armour also. Cases from S7 works with respective S8 models (chassis stayed the same apart from the notch on ultra).

[@LordomusPL]

The only new chassis is s8ultra. Which is bigger @ 14 inches. But afaik spigen and UA already has the thing rolled onto the market.

[@joshpearson1693]

WHAT FEILD PEICE LEAK DETECTOR IS THAT? IS IT THE INFRARED?

[@HVACRVIDEOS]

It's the DR82

[@mick2171]

Ah yes ur correct old ac door handle things are good Edit: nice tablet tho

[@ianwalbert8727]

your vids are the best

[@ICountFrom0]

I asked myself, "is this a favorite customer?" and then stopped myself. You treat every customer as if they were a favorite.

[@Aawsomeguy]

That kitchen HVAC unit does definitely need some maintenance.

[@crit71]

It's shocking that you guys still use R22. It got outlawed in the UK years ago. Do you still use R12 and R502?

[@andysanchez634]

By the way…….are you in Cen- Cal , how much is is school, and how long is school.

[@jasonjohnsonHVAC]

He's in southern California. In the Inland Empire ( Riverside county )

[@Vipertag]

WHY NOT USE NU22B REFRIGERANT, NO OIL CHANGE AS WELL?

[@HVACRVIDEOS]

I will discuss this live on KZbin this evening 3/14/22 @ 5:PM (pacific) come over and check it out kzbin.info/www/bejne/Y4KYdayXZdyWras

[@russellbarnes7732]

You know I think I just learned something here what you're saying is that that the sunlight is actually solar charging or adding heat to the air entering that coil wow that's a concept I have never considered. But hold on isn't the sunlight also solar charging the air on the shady side Before it enters the shady side of the coil. The temperature probe cannot measure solar conduction to the condenser coil. I would agree that solar conduction onto the coil is a factor but we cannot measure it with a temperature probe in my humble opinion

[@elijahtalbot5288]

Nice video

[@realestateservicessaleshea99]

There is no such thing as scrap refrigerant!!!😭😭🤣🤣😭🤣🤣🤣🤣 I'll sell you my reclaimer!😅🤣🍺 R22 use to be $32 a can and if you bought 10 cans or more it dropped to $27 a can!🤔😐🤣 Thanks again for the videos! 🍺🍺🍺🥃🥃⛳🎳 Stay safe. Retired (werk'n)keyboard super tech. Wear your safety glasses!

[@IFIXCASTLES]

Some of those thermostats have a hidden cr2032 battery on the main board.

[@russellbarnes7732]

Nooooooooooo 407c. I have had excellent results with R421a. I do not like the fractionation issue with 407c. 421 a does not require an oil change

[@Bloated420]

Is that s8 ultra?

[@HVACRVIDEOS]

Yes it is

[@russellbarnes7732]

I find it interesting that you think a 175ﾟ discharge temperature is really high

[@nolanmitchell7319]

He was just considering there was no load on the unit. If you look at the second time he went through the unit after he got the other condensers fan motors running his temp dropped down to 153.

[@HVACRVIDEOS]

I will discuss this live on KZbin this evening 3/14/22 @ 5:PM (pacific) come over and check it out kzbin.info/www/bejne/Y4KYdayXZdyWras

[@liam3284]

175°F is 80C, if that unit was under more load, you could boil water on the hot gas line!

[@shawnkauffman5537]

110F in the shade???

[@godspoptart2644]

Proper air flow and those dirty coils would have to be addressed before the customer and I even talked

[@godspoptart2644]

But … he’s very observant and spit on with his diagnostic!!! Hats off buddy , need more guys like you in the Feilds

[@YuShudNoe]

Russell Barnes is all I see in the comments 😂 "Story time"

[@Phred_Phlintstoner]

Lol I noticed that too. He seems to have a lot to say. I thought he might be a bot at first, but I don't think so now. Just someone who probably doesn't have anyone else in the trade nearby to talk hvac stuff with. It's all good.

[@ralphgiampietro85]

If you can't get them to change the whole unit why not change the evaporator you did not check the opposite side of the evaporator u bends they too may be leaking

[@russellbarnes7732]

So at your 24 minute mark the customer basically uses the rtf method. RUN TO FAIL. Then as human nature would have it complain complain about how high your price is lol. Comes with the territory but I've learned to tune it out.

[@russellbarnes7732]

Aren't you afraid of brazing those tube turns because the heat could potentially damage the tube going through the tube sheet and just create more problems for yourself given the age

[@HappilyHomicidalHooligan]

I simply can't understand Equipment Owners that don't spend money Preventative Maintenance and only spend money to fix the units when they break... How can they NOT understand the the cost of regular PM is FAR LESS that the cost of Repairs/Replacement of Equipment that isn't properly maintained... Equipment that has regular PM done on it DOESN'T NEED Repairs NEARLY as often as Equipment that doesn't get regular PM and it only needs replacement once every 15-20 years vs. the 7-10 years for the abused units... Regular PM's might cost you a few Hundred Dollars per yer per unit... NO PM's WILL cost you a few THOUSAND Dollars per yer per unit in COMPLETELY Unnecessary Repairs/Replacements...IF you're Lucky...

[@randomrazr]

they need FIVE exhuast fans in that kitchen????

[@lexmarks567]

I called you just for the thermostat I don't care about the other issues. Just replace the thermostat and get out.

[@jerryfrigeration]

Big Picture!!!!

[@russellbarnes7732]

In your video you said and the customer doesn't want us to spend of ton of time. And there is the absolutely number one problem in the universe. The nonsense you saw in the evaporator section is probably a result of the contractor being told By the owner don't spend a time on this thing get it in and get it running I don't give a hoot what it looks like cause I don't have to see it. My father-in-law told me once many many years ago when he would build RC airplanes and he said a good looking RC airplane is one that flies very very well. Same with equipment Because it reflects that you put care and time into what you're working on.

[@cliftonbrown3758]

🤣 don't ya know! Lol!

[@joemorales9093]

Sounds so fn typical....a company(in this vids case..a company is being paid to replace filters & clean coils) offers/will advertise "filter change & coil clean" BUT like in vid...coils are never touched....OR if they actually "cleaned the coils" it was just some quick half ass way & ultimately the coils aren't really clean.....

[@trebrehenuf]

We traced our tstat failures due to overdose of "sanitizer spray"

[@russellbarnes7732]

You said something very interesting "pay attention to" that's a thing a lot of people do not do, just simply pay attention

[@tonylaw196]

They should be replace a new unit. It would be getting worst and worst due to bad maintenance if they keep operate it.

[@stormlord55]

The suckey thing is if they don't keep regular maintenance on the new unit it'll be just like this one in short order.

[@tonylaw196]

@@stormlord55 Yes, it is easy to kill the compressor in R410A system.

[@Aizek415]

Тоже хочу такой манометр

[@hectikriley8773]

R404a has a gwp of 3922, just seem crazy to me to put such a horrible refrigerant into a leaking system to use for a trace gas for leak detection.

[@stephwaylonwells3218]

👍

[@pedrojardim1163]

👌

[@fleurdelune5240]

❤

[@russellbarnes7732]

Oops I didn't watch the rest of your video my bad.

[@russellbarnes7732]

OK hang in here with me why are you going to mix nitrogen in? I can guess a few things one is when you mix the nitrogen with the refrigerant you then don't have to pull out the recovery machine. My thought was going to be if it leaked down to 0 then you don't need nitrogen. A simple pressure test should reveal with the refrigerant only should reveal where the leak is. Thirdly some argue you can find the leak faster with a higher pressure. My method just by putting in the refrigerator and I don't need to drag up the nitrogen tank. I'm getting old

[@etherealrose2139]

Well since the lines are contaminated with ambient getting in why would you dump a bunch of good refrigerant in just to find a leak? Using trace amounts for the detector and nitrogen to boost pressure would be the best route

[@jonathanlatimer9957]

Also nitrogen can run higher pressure in the system and is an inert gas so once desired pressure is achieved to leak check the pressure wont fluctuate too much, also cost is a big factor a 55cu ft tank of nitrogen is $16 in CA.

[@russellbarnes7732]

@@etherealrose2139 great point thank you

[@russellbarnes7732]

@@jonathanlatimer9957 yep makes sense thank you

[@jonathanlatimer9957]

@@russellbarnes7732 All good, kind sir!!! I've been in the field for a while for a 35 yr old, and I've now learned working for myself a little extra work to save the $$$ on pulling up nitro is worth it, helps towards building the invoice total too :)

[@steveblake8766]

610 thumbs up

[@xN3hiox]

I don't know why i'm watching this, i understand nothing, im in a wheelchair i've never even been on a rooftop

[@bigbobwag]

Its so early lol

[@shine-cg9uf]

👍🇺🇸💪❄

[@megacisco69]

Who are you talking too? To your kids

[@CGGC0202]

Account: 7272016 OHHH YEAAAAAA

[@CGGC0202]

Account ID: 9838879 YES!!