Every single time I watch HVAC School vids or listen to the podcasts I learn a little something. Thanks for taking the time to make them!

Hey Bryan. Great video. I can’t tell you how many times 26 years ago that I condemned a compressor with an open thermal overload then another mechanic came in behind me and ended up being the hero 🦸‍♂️ and making me the zero. I’ve finally learned. Enjoy your Labor Day. God bless.

@tanyaradzwatysonmwoyosvi9093

2 жыл бұрын

Happened to me too hey

I love HVAC. As a maintenance supervisor it's my favorite field of the trades. Sometimes though, the language and terminology as well as different techniques used by various techs is simply intimidating. Like I said I'm maintenance, so I'm a jack of all trades, master of none. I definitely tip my hat to the HVAC super techs out there!!!

Solid advice Brian, thanks so helpful for everyone not just newbies I see vets do this all the time as well due to lack of patience and probably not having all the facts you mentioned Thanks again.

Bryan, great advice for ANY tech.Thanks.

Very nice good sir! Appreciate your time and videos! Hope you have a smooth week bro!

Good stuff. This is the right and proper way to diagnose the scroll and recip compressor when a tripped breaker call is received. The first year Super Techs will be compressor masters at diagnosing compressors correctly.

@HVACS

3 жыл бұрын

Glad it helped

Thank you so much for your videos! I am currently in school to get my license and after I read every unit I then watch your video on the same. It really helps me retain what I am learning!

This is very informative for some new guys. I have also seen misdiagnosis on a compressor with the reversing valve stuck in mid position. This could have many unseasoned techs think there is a problem with the valves in the compressor. I almost misdiagnosed a compressor once cause my gauges were open ( yeah that happened) But I caught myself before I made myself look like a dummy.

By the way I really enjoy your videos and podcasts and I have learned a lot from them. Thank you for everything you do for this trade!

Love the videos, keep em coming.

Great Vid!!! Stay safe in the hurricane!!!

Resetting the breaker after isolating compressor is a great tip. Us rookies need all the help we can get. Thanks

I have def mis diagnosed atleast 1 in my green days , I remember the day I realized it when I was on another job. Felt so bad but most definitely a valuable lesson learned! Thanks for the vids.

@tonydibiaso35

4 жыл бұрын

"at least one" lmfao

This video is very concise. You kind a got to the point and got your information out! Maybe you should do more while driving LOL

Loved how you added the tip about bumping the compressor if the overload doesn't reset. I've had compressors before where the overload never reset. Even well over 24 hours of letting it cool off. Gave it a tap with a rubber mallet and then it did haha. That simple tip saves people money!

Slick ! Great video

You doing a van video.. nice addition and idea, love it😂👍 Showing your working grit!

When I first got into service work I had a Carrier 40 ton packaged unit that was tripping the first stage compressor. Checked the terminals for a short. Found none. Still tripping the overload switch. Found out carbon around the strips around the terminal was the problem.

@ricardoleslie9811

Жыл бұрын

Thanks for that tip!

Great job

Over 30 years in this trade and I just now find out using a defibrillator, yelling at the homeowner to clear, emotionally shouting at the compressor to stay with me, before saying he's dead Jim is not the best method? Whats next, saying checking for gas leaks with an open flame is a bad rookie idea. But seriously, back in the 90's I misdiagnosed a compressor, thermal cutout was the problem, second opinion tech from other company figured out the real problem, homeowners thought I was out to gouge them, but it was a rookie error.

I just learned more in these minutes than in a semester in class… thank you!

Really impressed how you produced this to the point informative seven minute video during a commute. Keep shooting! What do you think about listing the 3 diagnostic mistakes under your video description after "Bryan covers the most common newbie mistakes when diagnosing compressors."

Good stuff! I wish you mentioned if the compressor is tripping breaker isolate it by pulling the disconnect, if the breaker still trips then you need to check the breaker. I only say this because we all have missed this step once..... hopefully

Lmao the glasses line killed me.

Good video. @5:12 you said to isolate the compressor reset the breaker. That is the very first thing I teach my techs before starting to pull the condenser apart to get to the compressor terminals, isolate, reset condenser 's breaker, if condenser fan runs, your problem will likely be the compressor, that is if capacitor and other components checked out ok.

Hi boss very excellent

Glasses don't look stupid at all fact they're the best ones. Because somebody bought you them out of love :), Thank you for the videos and on the information you provide.

Nice video. You just barely was onto hwy 50 by the end of the video. Super efficient fella.

Biggest mistake you’ve made is having that Carrier emblem on your shirt😂, ouch and those testo gauges, all jokes aside, good video

Awesome video! Liking you van chats 😎

Mistake I learned from on one of my first scroll compressors on 15dr freezer. Windings weren’t open and it sounded like it was running(although badly). Wouldn’t pump down and pressures equalized. I thought compressor must be bad. Find out that it’s opened internally on thermal yet windings don’t read open. Cooled it off (for over an hour it felt like!) and it worked perfectly.

I like your channel brother

Would an infrared camera be of help to determine if the compressor has cooled down internally? Great video!

That Damn Supco made me do it

Thank you. Great advice. raphael nyc

Had the exact oposite problem one winter the compressor oil was too cold to circulate and it wouldn't run. After the sun come up and warmed it enough it allow it to start up.

do you have a video for start/run caps and how to determine the right size for the comp/motor other than calling the manufacture? is there a math equation?

Good video! Do you think relying solely on a audible continuity test to ground at the compressor terminals to the metal body of the compressor is a good practice to diagnosing a ground compressor that is tripping the breaker?

@joshuaseaton4526

Жыл бұрын

Not solely, but you definitely need to do that as part of your diagnosis.

I had a difficult compressor today. Ohmed out good leg to leg, no short, no open but refused to start. It's not tripping the breaker either. I put a 3 wire hard start and it clicks out after 3 seconds. I ended up replacing it but it was difficult to condemn it. Of course I checked the cap and even replaced it hoping it would start.

Your highly skilled cool kind guy buddy

At tech school I have the students recover refrigerant before accessing terminals, for safety reasons , I’ve had the glass insulator burst pulling terminals off compressor, spraying oil and refrigerant. I realize this isn’t practical in the work place but when dealing with 16-18 year old students safety 1st practicality in time. FYI great video Bob

@DavidHernandez-le7qn

4 жыл бұрын

Really how dose that happen!?!?

@ZERO-F2G-

4 жыл бұрын

@@DavidHernandez-le7qn It doesn't its just another example of lawyer proof coddling, vs actually teaching a trade.

@RalphMercuroMusic

Жыл бұрын

@@ZERO-F2G- Of course it happens. You're telling me you never found a compressor with a pin blown out of the fusite? I had a 30 ton Carlyle blow a pin right after startup once.

@RalphMercuroMusic

Жыл бұрын

This is the proper practice and is in fact Industry Standard. I'm also an HVAC instructor with over 30 years in the biz. One of the text books I use is the Carrier Servicing Procedures Manual. It says very clearly in several location that compressor windings should always be checked at the lead end unless the system pressure is brought to 0 PSIG. I know how it's done in the field but students should be taught correctly.

@ZERO-F2G-

Жыл бұрын

@@RalphMercuroMusic Yes I am telling you that in 35 years I have never seen a pin blown out. I have seen them corroded to the point of difficult to use a repair kit, I have seen them overheated to mush, but never blown out. Maybe its because I have never been on a compressor over 20 tons, or maybe its just rare enough that Ive never seen it.

Hot moisture laden oil can cause a reading to ground too. What are your thoughts on that? Just curious.

I used to believe if you read anything but OPEN LEAD (OL) to ground that the compressor was shorted to ground.Turns out that a little voltage will always leak out of the windings and find its way to the shell casing via the refrigerant and oil.

it happen to me when 2 different technicien said to customer compressor is broken. I go to make another diagnostic of it I noticed that the compressor was hot, had tripped on its thermal protection and i saw the polarity not good. I let it cool all night and the next day I changed the polarity and fix the problem. the customer is really happy ;)

Copeland and other manufactures have books which identifies the resistance values of each winding.

Wish I could be a assistant tech for you

What about continuity on legs of compressor terminals grounded to copper lines.

Do capacitors dissipate heat? I heard this from a fellow tech didn’t know if this what true or not?

Eric M I'm not sure I'd have to get it out my van to find out. I have a Fieldpiece SC260

Compressor Hard start with relay can also save the compressor if not short to ground & make you look like a hero. That client will call you to replace the whole system .

@americanpie8059

3 жыл бұрын

When putting on a hard start for the compressor, the homeowner usually asks me how long will it last. I tell them it could be 10 minutes to 20 years. No real way of telling.

A side note at 3:19 - 3 phase compressors will read open windings between all 3 windings when off on thermal overload. Great video...

@jordanhenshaw

Жыл бұрын

What? I’m pretty sure they have start, run, and common just the same. At least the scrolls. Not sure about the giant, car engine sized ones though.

How about running a water hose over the top of the compressor like I normally do and waiting for the old meter to start beeping

How much time are you suggesting it might take for thermal overload to cool off? One hour? One day? What is a good conservative estimate of the LONGEST it should take?

I watch your videos all the time. Just curious, Y you named your business kalos

@tonymckay9031

4 жыл бұрын

facebook.com/kalosflorida/videos/10153954830587136/

If you have thermal overload a lot of times is caused by those damn thick blankets on older units especially the shitty Trane/A.S ones and the B.O.P compressors which are the purest junk there is!! I (ALWAYS) remove the shitty blankets on ones older than 10yr that is experiencing any issues... I know what is coming and try to save the homeowner time and calls for the future. "CONTINUITY TESTS" for continuity to ground going leg to leg comes first, then continuity to each other to rule out broken winding or overload, then ohm each leg and add up. Use a water hose on compressor if thermal overload or no "continuity" to "common" is found, leave meter on so you know right when continuity comes back... That is the quickest way to cool one down... Had one tonight due to the thermostat failing to send "O" signal to RV causing heat mode in 88* weather ambient, kicked the compressor into overload with blanket. 20yr old unit so i removed blanket, and before hose could be got it cooled down, started back up to find issue, tied the o and y terminals together for temp fix until homeowner could get thermostat due to him being "broke" as he claimed. Temp fix can go a long way!

I have a question Bryan. A few weeks ago I had a Lennox heat pump with a Copeland scroll that was immediately tripping the breaker. I unplugged the compressor at the compressor and sanded up a spot on the copper and checked each winding to ground but got no continuity to ground on any of the 3 pins. I then left the compressor unplugged put the top back on and flip the breaker and the condenser fan came on and the breaker didn't trip. I went ahead and replaced it anyway and used acid away because my qwik acid test immediately changed color. My question is can you have a compressor that's shorted to ground but not be able to see it with your meter. I wanted a definitive beep for continuity so I could feel confident about my diagnosis but I just wasn't getting it

@HVACS

4 жыл бұрын

Yes that can happen. The voltage used by a meter is very low and sometimes it won’t show the short.

@josiahpierson3636

4 жыл бұрын

Ok Brian good open conversation for this topic special case. So in his case how would you go about confirming that short other than him resetting the breaker everytime and seeing it trip. Because the low voltage induced by the battery in the meter when he tests for short to ground what other method would allow you to see the short?

@josiahpierson3636

4 жыл бұрын

@Eric M ok yeah that's what I figured the breaker could be weak from constant tripping or lra and tripping. A GOOD megohmeter then could show the short

Fresh out of a trade school program. Will tattoos effect the ability of me to get a technician position in a company

Just don't ohm out the compressor terminals if you've got your face right in front of them and there's refrigerant/pressure in there. It could blow out the terminals right in your face. Never seen it.. but I've heard it happens

@mbburry4759

4 жыл бұрын

What the heck are you talking about? Are you saying there have been cases of that entire plug just randomly blasting out of the compressor

How do u keep ur van quiet

I know that you are trying to keep the video as short as possible but by cutting out the delay between you comments doesn't allow time to digest what you just said. You give a lot of good info but the presentation is too fast, almost like you are in a hurry to get it out and be done. I suggest you approach it in a manner that not everyone is at your level of knowledge. You are very knowledgeable but being a good teacher requires you to be able to make things understandable to those you are trying to teach. However, I do learn a lot from your videos. I just have to watch them a couple times for what I've missed the first time through.

@excellentday

4 жыл бұрын

Also, the pause and rewind buttons work great too.

@leekazan556

4 жыл бұрын

Everyone learns differently. Watch it again if it is too fast and you will get more out of it the second time. Otherwise, he is helping all of us become better HVAC techs.

@hotrodriguez549

4 жыл бұрын

There is a rewind feature.

@earthling94

4 жыл бұрын

I found that the playback speed at .75x really helps me absorb some of the things I need to hear.

@shockingguy

4 жыл бұрын

You do know you could slow the speed of the replay down a little bit with those three little buttons on top of the video or just go back and do it again and again like I do all the time until I get when I’m trying to here in a matter what I’m listening to

AC guy checked mine wrong and said mine was shorted. 125 bucks for the wrong diagnosis. They wanted 2 1/2 times the cost to install a new one. Luckily I called a retired AC friend and he said you have to pull the wires Off. Turned out the hard start relay was shorted. Removed it and it fired right up. Never figured out why it had a hard start on it.

How do you isolate the compressor?

@truthsmiles

4 жыл бұрын

I'm not 100% on this, but I think he means to bypass the contactor and connect it directly to the service power. If the breaker trips, the amperage is too high and the compressor is bad.

@davejohnsonnola2758

4 жыл бұрын

If breaker is tripping, take the compressor out of the equation for testing by "isolating it". Disconnect at the terminals of the compressor, tape off the leads, (if typical residential a/c condenser, replace top so that condenser fan can run). Replace disconnect. Reset breaker. If breaker does not trip and the only component you have disconnected is the compressor, need to look harder at the compressor as your problem.

yesterday, i had a unit with a burnt off terminal. today i had a unit that was out on thermal. both fairly common problems. i have a semi-hermatic on a walk in cooler, that is just about gone. its got high consumption but still might run. how do i tell if its good enough to use?

Can we rebuild hermetic ac compressor...if yes .Can I have your contacts please

"Heat in the windings" shows picture of scroll. SMH.

@ninamcclure2193

3 жыл бұрын

Windings are right under scroll.

@BasketballAve

2 жыл бұрын

Those are scroll plates not windings. Windings are coils of wire coated in varnish

Keep a couple of ice bags in side your cooler not for beer but to cool off compressor no hose needed plus works faster just put them in top.

Where is Bert?

One thing I always stress to the apprentices i teach is that a megger IS NOT a diagnostic tool…

What if the compresser doesnt pump down is it bad

@TheNolesfan94

4 жыл бұрын

JUSTIN BRAVO could be bad valves leaking by, or if the system is over charged and isn’t able to pump down into the liquid receiver

Brian looks like 4’5”😜 😂😂 So if we can not use the supco Megaometer for the simple reason ! Why not address this issue to Supco!?

Don’t discredit your Mom, the glasses are great. I think she knows about glasses more than you know about compressors 😉

Hvac school. What if you have 2 open windings on 1ph 175v conpressor (residential fridge) lg compressor. I know if it overheats 1 winding opens. But you have 2 windings with no resistance /continuity.! Diagnosed bad compressor. I thought common sense. Turns out the new compressor comes in with also 2 open windings! Wth!

Lol the glasses comment ..lol....

My senior tech has always said insulation testers were no good, he doesnt use them, and hes been in the field for 40 years!

@joehead1294

4 жыл бұрын

Beer can cold on the suction line, right?

I thought the Supco megaohmeter was designed like any other megaohmeter? Terminal to compressor body (copper) not terminal to terminal.

@HVACS

4 жыл бұрын

It is, it’s just commonly misused by newbies who don’t know how to use it

@phoenixlegion33

4 жыл бұрын

Great videos bro. I didn't take offense as a Supco distributor but it is a decent inexpensive megaohmmeter, lol! I try to sell the tools they need and won't even buy this one. Then they look at me with those lost eyes when I asked if they checked their suspect compressor to ground with their megaohmmeter.

And dont forget to try hard start kit on older compressors u can squeeze 10 more yrs out of some

You can ohm a winding. It will read infinity 0

@joehead1294

4 жыл бұрын

Infinity and zero are two different values. Zero is no resistance and infinity goes on forever.

Had a overtime call thermal open condenser fan seized come back next day customer can't wait ok go out get 4 bags ice i'll start doing the motor .

I woder how many non-HVAC subscribers have caught their tech being full of crap and showed them the relevant video here?

You are not in control of your vehicle when you take both hands off the steering wheel to gesture.

Why this guy doing domestic HVAC instead of commercial HVAC, refrigeration or industrial refrigeration...

I have seen quite of your videos and I have to ask you is there anyone on your crew past or present who did a good job ,you have endless criticism of your employees.

Been using the supco for over 9 years has always matched my meter..don't agree brother

@tonydibiaso35

4 жыл бұрын

Even matches my fluke megger...have to compared them side by side...I have for years..always the same...weird right..

Learn how to use a MEGGAR! I mean a real one, not a cheap, battery powered one. Use a self powered hand crank meggar, like AEMC 1250. Learn how to interpret the readings, and use it as a part of your preventive maintenance program, to evaluate the condition of the oil/refrigerant atmosphere that the motor windings are being exposed to.

Part of the reason talking on a cellphone while driving is so dangerous is because our brains are physically incapable of giving 100% of our attention to more than one task. This means when you are driving and talking on the phone, you are splitting your attention between at least two activities-driving and talking.

@forrestfuller6359

3 жыл бұрын

Really Gerald really? You're one of those guys.

Your mommy bought you those glasses? Ahhhhhh

You should just drive

You talk tooooo fassst

@HVACS

4 жыл бұрын

You listen too slow... I wasn’t gonna say anything

Stop talking with your hands!!!

I hate to be rude maybe you sound like he was just babbling I couldn’t hardly pick up on anything you’re trying to explain