KITCHEN AC IS BLOWING HOT AIR
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- čas přidán 18. 09. 2019
- This was an overtime Saturday night service call on a kitchen ac that was not working. I found that the line 2 fuse was blown and there were a few issues that could have caused that, I got the unit running than I found that the indoor blower motor was going bad too. So I got them thru the weekend and we will submit a quote to repair.
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This is by far the best HVAC channel on CZcams!
Thanks so much bud! I dont know everything and there are many other techs out there better than I
I work in Ventura County and there is a huge shortage of technicians. Any company out here would die to get a hold of you. I own a very small company and technicians like you are very few and far between. Keep up the good work!
Chris you know why they say you are the best, its your attitude towards problems and your editing style is really good and through and easily understandable explanations of why you do things the way you do. Lately I have always been hearing in my head while I'm working away you saying "look at the bigger picture" lmaooo anyways thanks for all the hard work to bring us these videos
well there is no doubt, i have learned lot from him. he is the best
Yup his and hackfreehvac are the only 2 channels I consistently watch .. invaluable information
Man a chest mounted gopro would probably make your job easier by freeing up a hand. Keep the videos coming im loving them!
SGTGS I was thinking the same thing. A chest or head camera would be better.
Head cam would be better for us, we would automatically see whatever he's looking at as he's looking at it...
Yeah that would be nice for us but it would be a lot more editing and storage requirements on his end.. I'd rather have more videos than the better perspectives if it's a choice
@@jojomorgan8556 Not really, we are talking about replacing his tripod mounted camera with a chest or head mounted one. Same amount of video for Chris to edit, but his work would be much easier due to having both hands free while filming...
We would also get better viewing angles since we would be able to see things from Chris's perspective without Chris making a better door than he does a window (no Insult intended Chris)...
@@HappilyHomicidalHooligan you must think he leaves the camera on constantly like a head or chest mounted gopro usually is.... I don't think he does... it would be more recorded footage due to the cam being always on ....
Pro tip, with the size of fuses you pull you really should use the smaller end of the puller. Once used to it, it will allow you more firm dexterity with the fuse. The large side of the puller are for fuses 1 inch or larger diameter.
I'm an Hvac Engineer in the midwest and I just wanted to say your videos are so helpful. I've been a journeymen for only 2 years and there is still so much to learn. I don't work on Kitchen equipment but your general knowledge and tips are going to help me improve my trade and make my job way easier. Thank you uploading!
At 18:20 the belt is being sucked down into the sheave, replace the sheave and belt. The belt should never touch the bottom of the sheave, and that will ruin the mtr bearings. Almost forgot, memorize that sound, that is the sound a belt will make when it is riding too low in the sheave.
Thanks
You have a great work attitude
"If you want something done right.
...."
I am the same I would rather just do it instead of waiting for others
What burns me about this type of call is that the unit went down on Friday about noon - then they wait till late in the day on Saturday to call ??? That usually triggers my aggravation surcharge...
No doubt. Luckily our company has a hilarious emergency call rate that keeps most of these at bay. One such occasion is that I had to go get 2 security cameras back online, only to find out once onsite (1.5 hour drive one way) that they had been offline for over a month. I guess their daily checks aren't so daily.
We used to get this all the time when I was a telco RF tech. Landmobile customers would have something fail on Tuesday but call it in 4pm Friday as they were leaving for Pizza, demanding it be fixed by Monday morning.
I got paid overtime, but a 200 mile round trip against weekend traffic (all the shitty drivers come out to play on weekends) used to irritate me.
I get excited every time you upload, great video
Have to say that changing all 3 fuses is always a great idea I had someone who came to service our 3phase system change only the bad fuse and the compressor failed a week later... come to find out one of the "good" fuses was only passing half it's rated amperage and low-speed the compressor into a burnout (internal coils melted together from overheating)
Super excited for class to start next fall. I’m going to continue watching your videos until I start school, and during school try and help navigate through these systems with you! Thanks a lot!
Your approach to diagnosis is impeccable! Thank you for the great vids!!
Great stuff Stephens, I’ve been watching your channel for a while now and I totally appreciate your consistency and mythological approach to service, You mentioned a nearly 2 psi drop across the suction line drier which I was taught at 2 it’s time to change, I could also hear the bearings in that blower motor explaining the higher head pressure, GREAT WORK AS ALWAYS YOUR A ROCKSTAR!
I like how yall give back to the hvac community by uploading your hvac videos. It gives us techs something to go by and learn from. Thanks
You're the best instructor, I truly enjoyed watching your videos. Thank you!
I try to let run for a bit and re amp because sometimes it looks good, then after it runs and I've left guess what the problem was a motor that amped good at first because it was cool from being off ..Great vids
I've been following you now for bit. Looking to get into the field after 15yrs of industrial maintenance experience. Noticed you are really knowledgeable, thorough, and meticulous in your work and explanations of all your work. I appreciate all the knowledge and experience you share with us. Keep doing what you doing. Thanks!!
As an apprentice in the trade in Australia your videos are an awesome training resource. Yeah our voltages are different and we use Celsius but the fundamental idea is the same when it comes to things like fault finding techniques as shown in this video.Keep going with this awesome content, I for one will continue watching!
How does a rooftop unit get so banged up like that? It is as if they somehow took it to a demolition derby!! As someone who is fond of keeping older units running as long as possible, this one needs replacement!
Could be hail damage...and old age.
If you think this unit is bad, my cousin worked at a Burger King, and they got the AC units replaced because they were shot. When the units were lifted off the roof with a crane, they literally fell apart like a cartoon. Every panel popped off and the guts of the units rolled off the flat bed going everywhere. If that wasn't bad enough, the newly installed units didn't work.
Man I don't know what it is with RTUs but they do get beat to hell. I work at a movie theater built in 04 and the RTUs are already worn more than logic would imply. 3 story building, no trees or anything else around, very limited roof access to personnel, and yet they just look like someone took a baseball bat to em.
Banged up likely from careless service techs I’ve discovered removing & mis-handling panels ... They have been know to also cause roof damage / leaks by this improper handling by drop corners on roof to end up cutting the roof materials ... Customer ultimately calls a roofer when it was likely actually caused by the initial careless hvac tech 😩👀😤
Yes! Finally watched one of your videos right when it came out
Neat tip using the temp gun to measure temps at the terminal lugs on the disconnect. I will be adding that one to my bags of tricks. Yep, after watching many of your videos I have learned to never just flip a breaker on without making a few checks first. Another great tip on the fuses too. I didn't know about the bands becoming discolored when they overheat.
Glued to your vids for the past year. You have me considering a career shift from electrical to HVAC!
One thing to point out about the disconnect. Though it's not a distribution breaker, still; when operating the switch, especially after a protection failure make sure the arc shoot covers as well as the cabinet door are closed and latched before attempting to close the switch. Good on you for operating it left handed. If it were a flashy new system I'd suggest a NEMA4 vs 3R disconnect considering the location and duty. Thanks again for the awesome content! Cheers!
Every time I watch your videos I am struck by how well you teach. Info convey and delivery is not easy, depending on personality. I have had so many awful teachers in my life, seeing a good one is always striking to me.
Man I wish they had that measure quick setup when I was doing hvacr everyday That is a nice setup andhelps out a lot
Great diagnosis. I am surprised that the local utility does not bear some responsibility for the low voltage. I worked for a Utility company in Mass for many years and we would not have gotten away with it. Also the variable adjustment sheaves should be done away with. After balancing a unit it is best to put solid sheaves on a unit. Many of them fail and get loose on the threads. I have done many of these in the past. Good call on the disconnect. That also can be caused by low voltage causing heat. You have great video's and are very thorough.
Stumbled across your channel about a year ago and it was very refreshing to see a professional that takes pride and actually tries to find the cause of a problem and not just throw parts at it. One quick note: always check a disconnect (or any device) for volatage to ground as well. Not just phase to phase. If that disconnect had one stuck blade you wouldn't have known that checking for voltage phase to phase.
Great point, I will be going live on CZcams this evening 11/25/19 @ 5:PM (pacific time) to discuss my most recent uploads, and answer questions from email’s , CZcams comments, and the Live chat come on over and check it out if you can. czcams.com/users/HVACRVIDEOSlive
Learning a lot, thanks. That was an old unit. Change out coming soon.
This is why my guys always carry a can of contact cleaner! Any resistance or capacitance can raise temps!
100% agree the way you conduct the business.
This guys pretty damn sharp if ya ask me. Know his stuff well. Keep up the good work!😎
Love your videos amigo. Im coming up on 2 years in the streets and your "big picture" diagnostics are helping me a lot.
Greetings from SW Florida!
John Sharkey same! Southwest florida!! 👍🏽
@@angelomacareno5392 who are you with?
John Sharkey modern services at the moment. Been with them for over 5 years.they’ve allowed me to get my hands on refrigeration and I’ve watched Chris for about 2 years and they’ve helped me a lot!!
@@angelomacareno5392 Yep I like the big picture diagnostics. I know a few guys who used to be at Modern but are elsewhere now. Im with TWC.
Great job again like always
Even though HVAC is not my field, I always enjoy these videos. Partly because it's electrical/mechanical tech, and also because it's nice to watch someone work that actually cares about what they are doing. It's a rare trait nowadays.
Whoa! Hey man! I havent seen a video from you in a long time. Long time fan! Hope all is well! Crazy to see you on this channel for some reason. lol
@@mq1991 LOL ya, I seem to bump into my fans on various tech channels a lot. I guess it just means we all like the same stuff. For the past couple years, I've been having to work a lot more than I used to in order to keep up with the rising cost of living. So I haven't had much time for hobbies. CZcams has also gotten so strict with copyright stuff that I can't use random music and video clips that I enjoy to demonstrate equipment anymore. It's taken the fun out of making videos.
My favorite ac guy uploaded a new one :)
I'd have a hard time not writing up a quote for just about everything on that unit. I realize that customers usually don't care if a unit is dirty or if the covers are bent (they just want it to work) but as a bit of a perfectionist myself, I'd want to walk away from each unit in pristine condition, including clean, neat and tidy. I'm not an HVACR technician, my skills lie elsewhere, but I've seen similar attitude from customers. They don't usually understand the equipment, and aren't concerned with aesthetics...just "is it working?" Great channel!
Thanks. I always learn a lot from your videos
I will be going live on CZcams this evening 10/14/19 @ 5:PM (pacific time) to discuss my most recent uploads and answer questions from the LiveChat, CZcams comments, Emails, and Facebook comments come check it out if you can. czcams.com/video/tB11ZTSHhhE/video.html
Dang dude I learned something new !
Yeah, that disconnect is junk. It’s resistive and heating up. It’ll probably burn up another fuse next time that unit is heavily taxed. Great vids! Keep em coming..
Nothing a little bit of maintenance couldn’t clear up. Some emery cloth to remove old grease and corrosion, some penetrating oil to lubricate the pivot points and dried grease, and new grease on the knife blades. 5-10 minutes of work and it would be fine.
You are the BEST!
Yes! New content!
This series is, (hopefully,) lowering the time I am super-ignorant at commercial refrigeration.
great video
I had the same issue Chris. Blown fuse condenser fan motor was no good and the terminals in the disconnect were lose
amazing tech. wish you were local to me
Good video
12:20 an amp measuring on each one was nice to see
I cant wait to get out of residential and jump into a internship for a large commercial refrigeration company this year
when you checked the disconnect@7.35 .. check both sides of the fuse!! I have been caught out before where some idiot has wired the feed into the fused side of the disconect . (Here in the UK , and it was a MEM disconect where you cant open the cabinet without swinging the handle to off.) luckily my paranoia caught it with a meter before I stuck my fingers inside :)
You can also measure voltage drop across the disconnect to determine if it's causing a problem.
also, the suction pressure its always different from one stage to the other, in some carrier, most of them, there is a top evap coil and a bottom coil, one of them , mostly the bottom one has a lower suction due to poorer airflow. that unit wasn't low in freon or had any restriction. all electrical, check the downstairs breaker.
When I grow up in HVAC I want to be just like you. 1st year apprentice, unfortunately my school is not hands on.
I finished school in June 2019 -- they tried to make things as hands-on as time and curriculum would allow-- but while you're in school just absorb what you can. The hands-on is waiting for you in the field in huge amounts!
Scotch brite works wonders on corroded contacts in various apparatus. Served well many years using them on the contacts and blades in 14.4 and 27kv distribution breakers :) there’s also a paste we used I can’t remember what it was. Looked like Vaseline. Kept them clean until the next maintenance schedule.
Dielectric grease is the Vaseline looking paste. It's job is to prevent further oxidation / corrosion.
Your suggestion of scotchbrite is better than the idea of putting dielectric on the hot contacts.
Scotchbrite will remove the oxidation, lower contact surface resistance and the excessive heating seen as a result.
Dielectric is for use after the fix, not a fix in itself.
IncandescentWithRage exactly it’s for after the fix itself. We used that grease on the contact surfaces for distribution breakers plugging into 1200+amp bus bars.
The aluminum was a whole different story. Penetrox is nasty stuff 😂😂
I got hazed a lot by a guy that wouldn’t let it go after I was there for a year. Dumped a pint of penetrox in his toolbag. Never messed with me again 😂😂😂
IncandescentWithRage all the stuff we used was from DOW. I think the part number for the grease was 111 can’t remember.
The best! 👍
Definitely, always gotta cover your butt and not just "throw in a fuse and see if it blows again"! Doing something very different myself, I took out an entryway lighting circuit once by mistake. Luckily I had records of my whereabouts and the timeline of events, because a few weeks later a call came in from corporate about that location, saying that I had blown the main breaker and all personnel had to evacuate. That obviously didn't happen, but corporate had no idea. Only thing I can think of was that it was a holiday weekend (another FMF) and they wanted to head out early. They had started trickling out long before I had popped that one circuit, and the last of them actually kicked me out at about 3pm because "they were looking to close up early that day". Some places just see a target painted on your back lol. Love the videos!
NEVER just "Replace the Fuse/Reset the Breaker and just see what happens"! Fuses/Breakers blow because Electricity is going somewhere it shouldn't be in a hurry (Short/Ground Fault/Dead Short) and that is going to either damage equipment, start a fire, Hurt/Kill someone or some combination of All-of-the-Above!
Always use a Circuit Tester/Multi-Meter to find the problem before Reseting the Breaker/Replacing the Fuse...
I speak from Painful Personal experience, an "Electrician" reset a Breaker without finding out why it was tripping at a place I briefly worked and I got tossed 15 feet. I rested my hand on the case of a Deli Slicer as I turned it on (my way of making DAMN Sure my hand was nowhere near that blade) and it had a Dead Short in it...I got tossed 15 feet and ended up in the ER for observation, the breaker blew again, the slicer got even more damaged from the internal arc and the Idiot "Electrician" got fired for Negligence...
I suspect the main problem in blowing the fuse was a dirty or arcing knife in the disconnect switch. All three of those fuses were hot on top, and the insulation on the wires into the disconnect, especially the center one, looked like they had been really hot. Obviously there were other problems that may have contributed.
Electrolytic caps tolerances are generally -20 +100% = meaning if it's only 10% down I wouldn't worry about it. They're primarily there for power factor correction
Chris. With the service panels off you are not getting correct airflow (pull) through the condenser coils. The air will take the path of least resistance and that’s not through the coils. That accounts for your high head pressure issues. Before I start talking restrictions I’d run the unit under design conditions which is completely sealed up panels.
History ... Also, I limited (no longer in the biz now) my run time without the panels in high ambient temps.
In the old days of belt driven compressors (which I had my share of repairing and replacing with Hemetics), the motor's heat energy was not mixed in with the freon, so high temperatures and moisture levels were manageable and at worst resulted in frozen TXVs. Once we combined the high temps of compression + windings within the same shell, the reaction of H2O and CCL2F2 (R12) started to create HCL and there were a lot of early compressor failures due to the lack of proper understanding of dehydration and the acidification of oil. Those earlier guys I worked with used old refrigerator compressors as vacuum pumps or simply purged out the air. It was thought early on that the Hemetics were the failure point. But once compressor manufacturers starting analyzing compressors coming back for warranty replacement, they identified the acidification of oil issues, and the industry responded with better training methods of dehydration and 2 stage vacuum pumps, micron-meters, changing filter/dryers once opening the system, limited exposure time left open. When I taught HVAC I no longer referred to it as "evacuation" but instead used the word "dehydration" as that in fact is what we are doing. Anyway, long way of saying, minimum time of that compressor being exposed to high head temps saves oil life and seized compressors down the road. It's good to watch someone like you who understands what he's doing and not just swapping out parts. So many of the field techs who came in for my classes (usually sheetmetal HVAC guys) had no understanding of what they were doing from an analytical standpoint.
When you initially turned the unit on, it did squeal a second as if a belt or bearing had an issue and sure enuf you were lead back to re-check ... Great Job ...
Also, when you temp checked the center fuse I wonder if that high temp was ultimately being generated by the blower components ?
Noticed a wire in front that had the insulation rubbed off, probably shorting against the cover
A few years ago i did this kind of work,, mainly TRANE package heat pumps,,, a job i miss,, it was very enjoyable,,.. i experienced all sorts of problems on units much older than these,, some problems were caused by people, like reconnecting the phases the wrong way , causing the fan to turn the wrong way and delivering much less air.. Another problem that stuck in my mind,, having a kitchen exhaust fan blowing , geasy air onto the condenser coil , insulating it with grease , reducing its effectiveness in the summer....i could go on,,,R22 has gone now, ,, i am not too sure what has replaced it in new units,, probably R32 ,, certainly not R407C which had problems of it own..... Thankyou for the video very enjoyable...
Bro your the man
Thanks bud!
Hahaha at 1:30 I was like blown fuse, from bad compressor, 🤣😭 I have 7 of these units on my roof and they suck
I know anyone would have already mentioned it but ... as you test the disconnect switch to be really dead , you should test to ground , not to other phases. Because if one phase still remains powered and the other two would be disconnected you dont get a closed loop. Therefore (like you would be ground while touching) better test to ground.
I love ❤️ your video
I really enjoy these videos. I've been looking into getting into this field from auto mechanics, I already do a lot of reefer and its one of my favorite kinds of repairs/service, I enjoy finding and solving complex problems I just think automotive is kind of a BS field. would love to get into a union somewhere or something and do their whole apprentice>journeyman deal. i know atleast that the electricians union here is doing apprenticeship's and classes etc i need to link up w whatever union does this kind of work in my area
Hi there, I think you are doing a great job with your informative troubleshooting videos! I would just make one request. Would you mind avoiding tightening live electrical connections on your videos where possible? I find many people become complacent or loose focus while diagnosing live electrical and it is always better to take a few minutes to shut down the power upstream of a disconnect beforehand. I'm in Ontario and we are required to wear high voltage gloves while doing any sort of live work (including voltage testing). We still have fatalities due to electricution each year in most of our major cities, usually with the high voltage gloves found on or near the unit they were servicing. Keep up the good work!
thorough troubleshooting for sure, excellent vid man. I do have to ask though, did you expect nothing less than for those contactors to look new? lol
First😎 haha but for real tho I love your vids I'm an apprentice rn and watching your vids help me to learn and impress my boss keep up the good stuff!!
Pretty amazing how long some of those will keep trucking for. Even seen some older Carrier and Lennox units out by the coast keep going even after just about all the fins have rotted off the condenser. Just a bunch of bare copper tubes and rust.
The condenser door where you were testing was still open some, couldn't that drive the head pressure up since its not fully pulling through the condenser when you dont have the door on all the way?
Temperature rise and temperature drop across the coils is the only other thing I would have done. Good work my brethren!
Low suction could have been the bad motor bearings and pulley+belt, and don’t forget the return grills. Slightly high head could be the condition of the unit as you said.
Gotta look at the filters that unit needs to breathe and is the economizer open? Great vids thanks
good vid
Thanks!
My dad was the kind of guy who, when we blew a fuse at our old house, he replaced it and turned the breaker right back on without bothering to check why it blew, which happened to be because the power consumption of both an air compressor and the florescent lighting was too high for the fuse. Needless to say the second fuse blew instantly, and so on until we were out of fuses. it was only after we had to make a trip to the hardware store and buy new fuses that I finally stopped him, unplugged the compressor, and then let him replace the fuse. After that I made sure the lights were off before the compressor was plugged in. Surprise surprise, the fuse didn't blow. I think new fuses cost us 20$ or more, but the look on his face was priceless when I got the thing working by turning off a lightbulb.
I would like to see a Video about the fieldpice device. How to they work? Do they pinch the tubes or detect it thru the copper? What Do they measure? I'm not a hvac guy, just some random tech interested dude who like to see you diagnose some random machines :)
Always got to split those, if you think those have allot of problems you should see mine lol, they make those look new
Your vid is exactly one strong Bloody Mary long ... Which is perfect ... Lol ... Good one ...
I hope you are going ok with this Coronavirus going around
Dude i envy your intelligence. I work with a few different leads and youve shown me there is such a thing as qaulity of intelligence
even though i dont understand squat, keep them comin...*
Getting close to 50% of a new unit with all the work needed on that machine to get it back to mfg specs. Are you going to quote them a replacement? And it would be a surprise if your low suction was due to the issues with the blower motor bearings and a dirty fan.
Corrsion on the middle input terminal
i'd be thinking the fan motor reversing wires are rubbed through on a grill since they're stuffed through and all the vibration.
Always, always, always change all three fuses on a three phase system. You can be sure that AT LEAST two fuses have carried some degree of fault current where star (wye) or delta connected loads are concerned. In the absolute worst case, during a fault, the ‘sand’ in the HRC fuse can start fusing together to form a ‘tunnel’ of glassy sand but the element doesn’t break. Imagine you replace only the ‘failed’ fuse, but leave the ones with the forming glass ‘tunnels’. Next time the fuse is called to clear a fault, the element ruptures but the sand cannot fall in to quench the arc. Now the fun begins..........the arc can (and does) burn out of the fuse body and very quickly (within a couple of cycles) propagate into a full three phase arc flash within the disconnector. Imagine you were just flicking the equipment back on to test and a fault remained in the plant. Now you are facing an ‘arc in a box’.
Always replace all three fuses.
Always close the gear before energising.
Thanks Chris! I sent you an email on the same topic too 😉
Arc flash is no joke, at best it's a good way to make you feel like your eyes were sandblasted, at worst it can kill you.
Never seen one in person, but I have seen the videos. It's literally a constant explosion fueled by electricity.
Some rocket engines use this phenomena to heat propellant, they're called Arc-jets.
Mostly it's thought of as a low-thrust system for propelling satellites in the vacuum of space (too much power needed to create enough thrust to push something off the ground, but just putt-putting around in space is easy with a few 10s of kilowatts of solar power).
The best part is that you can use just about any liquid as propellant, provided it won't freeze or boil in the tanks and is somewhat chemically neutral. I think there's a company designing one that runs on Water, but you could use Ammonia or Hydrazine if you wanted a little more performance per kilogram of propellant.
Can you do a video with examples on how you quote repairs
Hi!
I'm wondering, why don't the condenser fan motors etc. get protected from overamping by a dedicated circuit breaker?
This is airflow issue %100 as soon as you will replace that motor superheated will go up cuz sub cool was ok I had same problem before
Ok so I've bin watching your channel for a week of bing ...I love machanical stuff and electrical and em at a hobby level of skill...shuld I go to school for this...the only thing is I don't want triangle roofs ...can you only work flat roof stuff by chance
We need all the help we can get in this trade I will discuss your question on my Livestream tonight , I will be going live on CZcams this evening 12/16/19 @ 5:PM (Pacific Time) to discuss my most recent uploads and answer questions from emails, the chat and Facebook come on over and check it out if you can. czcams.com/video/_20hGnjjK44/video.html
@@HVACRVIDEOS thank you I'll be there :)
If you're worried about the disconnect switch: Why didn't you measure voltage drop across the various terminals or check the current on each of the 3 legs of the incoming current for each phase? I know nothing about A/C, but electrical engineer in me is curious. ;)
Mentioned putting dielectric grease on it at 13:06 to make a better connection, though wouldn't that do the opposite? Used to think dielectric grease would improve the connection, though I've heard it can only help lubricate and protect connections from corrosion or arcing. Would be good to hear your experience with using dielectric grease on connections.
It's a temporary solution to the disconnect knives not making connection. I personally feel that the grease will attract sand and cause more problems in the long run
Is it a hybrid system where it is a heating unit as well like heating coils ?
Ahhh..back to the old weathermakers..the suspense is killing me..
I'm curious about the modern architecture and design decisions in your industry. I mean it is 2019 and the industry still sticks to mechanical contractors instead of SSRs or another semiconductor solution? Is it a matter of cost? It can't be a technical issue as we have megawatt semiconductor parts these days?
Hey Chris, any reason why you guys still use fuse breakers instead of thermo magnetic breakers? I think you've answered once on a live stream but I forgot !
I'm asking because they're getting rarer and rarer over here , and also , any reason why it's always in metal box instead of plastic ?
Cheers !
Unsure about the thermo magnetic breakers, but the metal box is used as a ground. It's supposed to short and blow the breaker indoor if something comes loose, rather than leave a power line dangling inside a disconnect box.
Do you carry a can of CRC QD on you to clean contacts?
Isnt it cheaper to just change to a new unit in this cases or no? Or does it depend on the amount of problems?
System of lugs is bad and bare wires tightened is not good. I prefer to use ferrules and crimp them and then tightened into the lugs.
Maybe you did, but did not mention it or show it.
You replaced the bad capacitor, but left the other one. Usually you replace multiple items when you replace one, like multiple fan motors, the fuses, or contactors. As you state, it would be cheaper to replace the cap now rather than on another service call.
I see there is an issue with getting fuses out, along with blades making good contact. I have been an HVACR tech for over 15yrs now. I have been a plumber for 10yrs. I have been in electrical and the manipulation of the electron as a hobby for my life. The biggest issue an electrician taught me with boxes like that one, rather it be a breaker or disconnect, is that there is no protection from the elements. I carry dialectical grease for all fuse and disconnect blades. The biggest issue is corrosion between points of contact. Even if the blades are not all the way in front of each other. They may be still fully engaged. Just to much corrosion.
Holy crap what size caps are the three fans, should be 5 or 7.5 highest of 10 after market
Despite the pitted contactors, they still have zero voltage drop across it, i know you're looking for preventative measures but they still fine to me
joel watts the points are what give contactor s the rating. When the points which are made of silver get pitted the contacts can arc closed or give a bad contact. Changing a contactor beats the shit out of changing a compressor.
Great video as always. Im the same with phone calls. As soon as a phone call is going to take longer than 5min worth of checking the blatantly obvious stuff you might as well just go and do it. Also is it part of the code for the disconnects to be mounted on the units? I just see so many disconnects go bad on both yours and other hvac chanels that makes me think they just get shaken to crap by the units especially as they get older.
TheColinputer by code here in Texas the disconnect or breaker must be within 15’ and in sight of the unit. It’s a safety issue.