The Main Reason Why Start Capacitors Fail in HVAC Units! This Cap Blows Out!
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- Опубліковано 3 лип 2024
- In this HVAC Training Video, I show a Start Capacitor actually Failing by Blowing Out. I discuss how the start capacitor works and how it is different than a run capacitor. I discuss the main reason why these start capacitors fail. They fail from overheating, high voltage, and from the potential relay sticking in the closed position. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
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Craig, as an HVAC-R instructor, I just wanted to give huge Kudos for everything you do. You have the heart of a teacher and you are an outstanding technician. Thank you.
As a vegas hvac 1st year student that also plays bass, hopefully our paths soon cross
and so many "techs" especially with the companies that advertise locally will tell you it will cost $1,200.00 to fix. All I can say is when you have HVAC problems and some company is trying to charge you $$$$ for a fix, get a 2nd opinion. I bought a new system, made calls and found a licensed HVAC guy who did it for $1,300 less then the big companies wanted to install the indoor and outdoor unit. I helped him when it came to hanging the indoor unit and he did all the rest. They have to charge $$$ to pay for all those commercials they run which are never ending where I live.
@trvman1 you can't knock em for trying to make money but I agree with the second opinion... our skills are very valuable and we deserve to make a good living
I have no idea why this was in my recommended videos. But I enjoyed watching it and learn something new.
It's in your recommended because youtube algo is fucked right now.. just click "don't show this in my recommended" and this idiot will go away.
Larry and Leroy are probably right. However, getting "out of your lane" is a healthy exercise for the brain.
This is a great example for why root-cause analysis is so important.
Simple..the government stuck their noses in the HVAC business and it was determined that the capacitor manufacturer's could no longer fill them with oils for cooling the capacitors. The result is the capacitors cannot take the heat, resulting in failure due to overheating.
that is what makes a great tech, fix the problem, not the symptom
@@randallgreen6746 Removing toxic PCB-based oil? Oh, the horror!
What I love about this instructor is not only the information given, but how tight he keeps his lesson. Then to put it together with video editing, two camera shoots, and excellent sound, just a job well done sir. Thank you.
Holy Crap!!! Due to the 4-day, 90+ degree weather in NJ, my A/C stopped working yesterday....we called for repair and the technician showed up around 9 PM last night. Guess what he found? THE CAPACITOR BLEW! I'm gratified to get a repair so quickly...incidentally, the total cost for parts and emergency labor call was about $330.00. However, I'm a little creeped out that this happened yesterday and UA-cam pushes this video to me today....big brother is watching.
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Excellent video. Hvac tech 20+ yrs and have never got to see start cap fail. Ty
Our "Old Faithful" start capacitor! Thanks for the great demonstration.
Glad it was helpful!
Craig you’re the excellent instructor of my life I showed, much appreciated for sharing your knowledge with us.
I've seen the after effect but never seen it in action. Love the slow camera reaction on this. Great job. Sub for life
I would not want to be next to it when it blew while taking voltage readings. Man, talking about getting the crap scared out of yourself.
Damn!
One of the best videos I've seen on AC in a very long time
This is the best explanation with an example with a failed relay. Thank you!
That was an awesome video. Really liked the way you staged the failure of the Start Capacitor. Great slo mo shots as well. Thanks !
Yes craig we can't get enough the more u know the more it helps the newbies thanks again 👍👍
Glad the videos helped Esmar!
Thank you so much for the time and effort putting in toward this demonstration.
I love videos about planned component failures and their effects. Please do more!
Most usefull video on the internet!
Our A/C guy was just changing the capacitor... When it failed a second time, he said it was time to change the unit!
Turns out the emf relay was busted!
Thanks!
Great knowledge..... I had this problem with one of the units and I nearly gave up until this video shows up.....
Thanks a lot guys.....
Wow. I just learned something about ac that’s probably only learned at school. Thanks for sharing.
Excellent video, I just had the A.C. capacitor replaced, the unit is only a year old, the tech. replaced the capacitor, but now I will check the relay as shown on this video. Thanks for sharing 👍
Fantastic demonstration
Love it when you expand away from the basics
Thanks Jeff!
Greatly appreciated all the efforts you do for the community and money saving for homeowners and even A/C technician, thanks graig muchas gracias amigo
All of your training videos are Excellent! I really loved this one 💯💯💯💯💯
Thanks a lot Brandon!
I’ve watched several vids on how this process works. This resonates better than all of them. Thank you.
Glad it was helpful!
Well explained. I was a hvac serviceman for 38 years. I changed a few of them!
How long do those kits usually last?
Love your videos! Very clear and easy to follow presentation. You have a gift of beating a great teacher!
Very well explained and demonstrated. Thank you for this. As a homeowner, you want as much information on the equipment in the house as possible.
Glad it was helpful!
That information is worth a million bucks!! Excellent presentation. Thanks for sharing.
Poorly made Electrical Relays ..Too. .
Good job on the presentation!
I just had one blow today with an enormous blast.
I'll examine the relay tomorrow!
This was a phenomenal video.
Your are my hero. So smart and easy to understand. Love your videos especially the ones explaining subcooling and superheat measuring. They have saved me a ton of money. Thank you and keep up the great videos.
I appreciate that!
Great video, very informative! The day was not a waste, I learned something new. Thank you for sharing your knowledge.
Glad you enjoyed it!
You have a natural teaching capability. I enjoy learning anything and this lesson was a easy to understand and capture the information given. No gasps missing. Great job.
Thank you so much!
Very,very professional. SINCERELY.
I've seen many 'Welded' contacts on '20/40 pressure switches' for water pumps. Now i know what to look for in my AC that went bang. Great instructional vid 👍
I can smell this video. Excellent instruction, actually helped me with a different electronic.
Awesome video. I love learning new stuff. Caps have always kind of mystified me but you helped me a ton here.
This guy is amazing! Awesome instructor. Guys new should watch this guy. You will learn the right way to do things! Keep up the good work.
I appreciate that!
I am almost sure that's what just happened to my unit...the thing that blew is on the inside of the unit near the ground below the blades...yours is conveniently on the side easy to repair...Thank you for you video
I'm an electrical engineer. That was very good description of this failure. It's hard to get that stuff across sometimes to the trades people but, you did it. Thanks!
As a Trades person it hard to get stuff across to engineer's...CHEERS
This was very helpful. As in right now I’m going to trade school to become a hvac technician. And one of the things my professor said was. When you check a component that failed not just replaced the part that failed but also try to find out why it failed. In this video you showed what made the capacitor failed not just the capacitor is bad because the MFD are lower. Great video
Elctro plat oil oit comeing over over oiy systom bacal th.......$
The unit at my old house was so close to the den window that when a capacitor failed years ago I hit the floor because it sounded like a shotgun blast when it blew. A week later the replacement capacitor blew as well. I now have A/C PTSD.
Lmfaooooo
Boom! :-) Totally. I think you'd have to be either wealthy or numb to not have the jitters.
Get yourself a capacitor shrink.
absolutamente good demostracion !! Thank You good Techs
I use your book and videos for classroom trading. This is one of the best yet. Thanks.
Thanks a lot Jerry and if you need anything, email me at questions@acservicetech.com thanks for the note!
What book do you use?
thanks a bunch on the advice very helpful and something to remember as well when trouble shooting thanks
Thanks. Excellent video and explanation on causality of the problem.
Glad you liked it!
Thanks. Finally I understand the small circle on the top of the start capacitor.
Glad it helped
Between this guy and hvac school these are the two best hvac channels out here on youtube
Great explanation, Thank you
Amazing, I learned more today about HVAC Capacitor in 5 minutes than my entire life...
I was glad to see your video in my recommendation. Your explanations were great. I wished I had seen this few weeks ago to help me trouble shoots my ac problem.
Glad you enjoyed it!
Wow. I now finally understand this system. Thanks. Good teacher.
Glad it was helpful!
Why research & development is so so critical for an excellent product - Awesome analysis
That was a great video. The only thing i would add is the resistor is there to prevent carbon build up on the contacts from arcing when it makes and breaks.
👏🏿👏🏿👏🏿beautiful demonstration
Great video Craig, I also found your book and other resources very informative! It was nice talking with you at the HVAC symposium a few weeks back 🍻 from Florida!
Jeremy, Thank you very much and great to talk with you! It was amazing being there!
@@acservicetechchannel it sure was! I hope you and your family are well, and take care!
Someday this will save me money. . . thank you!
I liked how you described "amperage crossing" from Run cap to Potential relay! This morning I taught two courses on our Kickstart product line (which comes w a bleed resistor, btw). Bc of the amperage crossing, I stress the need to test the existing Run Cap while the system is RUNNING. I'd be happy to discuss more of these topics, HSK's just happens to be the most exciting...lol.
Would the compressor be able to start with a good hard start kit installed on a unit with a failed run capacitor, and what would be the effect on the compressor?
great video ..... i just pass my school and got my Universal EPA .... but i am still learning from you ... thanks for great video...
Congratulations on passing your school and obtaining your Universal EPA certification! That's a significant achievement, and I'm thrilled to hear that my videos continue to be a valuable learning resource for you!!
Excellent video!
Outstanding training presentation and demonstration.
Thank you very much!
I learned a lot from this video. Thanks
Exelente explicacion amigo.
Wonderful information. Clear and concise. Thank you.
Glad it was helpful!
Great video. Thanks for posting.
Thanks for watching!
Great video. I believe that the reason why the relay fails over time is the same reason 12v relays fail on vehicles. corrosion at the connectors (in the wiring circuit) causes the voltage to drop. Since Power = volts x amps, when the voltage goes down; the amps go up across the contacts and burns them up. Same thing happens on relays, solenoids and starters on cars. Poor quality relays today may also contribute to the failure. In other words the Electrical Engineers don't design for the extra amps due to the extra corrosion resistance.
You're truly a great teacher and very knowledgeable thanks
I appreciate that!
My fan start cap went bad, but I think it just dried out after 10 years, it didn't leak/rupture. I cleaned the start circuit's enclosed relay contacts and removed the dead wasps that were jammed between the exposed motor contactor contacts. Back in business, and now I do a periodic check for wasp nests. I'm glad I didn't spend $500 to get this fixed. The capacitor was around $8, shipped to my house.
Great information and superb presentation. Thank you.
Glad it was helpful!
Craig is a great instructor teacher And technician
Once the start cap goes, you should also monitor for high start and run current draw when the new cap is installed. Some shorted windings could lower the start winding resistance to the point that higher starting currents will continue to eat capacitors and will eventually take out the system circuit breakers, too. Plus, burned windings change the inductive reactance of the coil which will make this machine run inefficiently and hot (motor winding resistances are so low (1-10 ohms) that a multimeter cannot supply enough current to give accurate resistance readings, so run-start current is a safer test).
Well done!!!
Thank you.
I had no idea.
Happy to help
Great vid man. Dig the informative style.
Great demonstration Another awesome video, thank you.
Glad you enjoyed it
I really like this illustration. Also, keep in mind to use multimeter to test the Start Relay before it burns. Proper position of relay is crucial because terminals stay in right position if not affected by gravity.
1- Terminal 1 & 2 should have continuity and NO resistance reading. Any resistance reading means the Terminals 1&2 are making poor contact. This justifies a preventive replacement. But, if necessary, it is better to get more evidence.
2- Resistance reading on High Resistance Coil, between 2 & 5, should be very close to 5K Ohms, anything higher means the coils is failing. It should be replaced.
3- Any brown round/oval stain close to terminal 5 is a visual sign of coil overheating and should be replaced.
On your point #2, is that reading when the relay is disconnected from everything?
Always disconnect wires when checking a load for ohms.
Wow - sure am glad I clicked on this video! Not sure relay is a DIY project for me though. I was just going to swap the capacitor out.
dang, good one Craig thank you again for sharing that.
Jimmy, Thanks!
Best video ever to watch things blow ....lol, My well pump had a blown Capacitor , took your advice to also replace relay wile doing repair . Thanks for vid
Glad it helped!
Really enlightening. Thank you
Glad you enjoyed it!
Fantastic explanation
Glad you liked it
This is a great one! Thanks Craig! 👍🏽🥸
Thanks a lot Chuck!
Thanks again for another great video! 👍🏾
Glad you enjoyed it!
Thanks for the knowledge.
So nice of you
Outstanding demo and information.
Thank you kindly!
Thank You for the valuable information!!!!
Glad it was helpful!
Excellent video and clear explanation! Thank you very much
Glad it was helpful!
Excellent Information, thanks!
Glad it was helpful!
Thanks Craig very good education
Thanks again
Glad you enjoyed it
Good demo
thanks so much for sharing your knowledge
Glad it was helpful!
I've changed a few of those on some Frigidaire A\C window units for family and friends with breaking ac during summertime. I also changed ALOT of circuit boardd for about 65$. It seams that they design window units so that condensation will perfectly fall and accumulate the bay
Thank very nice information
Excellent video, so well and clearly explained and demonstrated.
Glad it was helpful!
This is gold to me
Very through and to the point. Thank you.
Glad it was helpful!
That capacitor didn't fail, it lived a great life!
Ha ha, yup good little guy!
after divorcing it's multi-prong needy relay wife :))
Capacitive juices...lmao
Glad you found the "capacity" to post on the matter.
@@throttlebottle5906 #BeenThereDoneThat
Nice format of the video. It was very interesting.👍🏼👍🏼👍🏼👍🏼👍🏼 I've learned something new. Because it's not a really common issue, it was not clear in my mind.
Got ya, thanks for letting me know and thanks for your support!
Thank you!
wow...what a great video instructor/educator