Central A/C Compressor Won't Start Up(Stuck/Momentary Hum )

Ғылым және технология

How to fix a Central Air Conditioning A/C or split system A/C compressor that won't start up (stuck/momentary hum) to allow cooling. Usually you'll hear a momentary hum from the compressor when power is supplied. This video should supply all the information you need to get your A/C up and running. Enjoy!
Reasonably Priced Digital Multimeter used in this video:
• Great DMM(Digital Mult...
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Dual Run Capacitors:
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Hard Start Kits:
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DISCLAIMER: If you're not comfortable working with 120V/240VAC electrical wiring, or unaware of the dangers of working with 120V/240V wiring, then DO NOT attempt to work on your unit! Safety first! AC Mains Power has the potential to KILL or injure you. This channel will not be held liable for any bodily injuries, property damage, or deaths resulting from the use or misuse of information contained in this video. The viewer assumes all risks and liabilities if they decide to duplicate what's shown in this video. Certain methods shown in this video, may not be considered "Proper".
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Пікірлер: 331

  • @electronicsNmore
    @electronicsNmore4 жыл бұрын

    Be sure to watch my HIGHLY POPULAR Central A/C Full Troubleshooting video below. Thanks! kzread.info/dash/bejne/eK2olJl9ZZOYnMY.html

  • @cruzfamily7777

    @cruzfamily7777

    4 жыл бұрын

    My compressor is doing the same thing as in the video, a friend of mine is going to check it this afternoon!

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Good luck! Be sure to share my channel with many others. Thanks

  • @redesignedminds8513

    @redesignedminds8513

    2 жыл бұрын

    Can I download this video for my elearning module?

  • @Pickyricky69420
    @Pickyricky694203 жыл бұрын

    Yes!! Thanks buddy! This helped me diagnose and repair a 37 dollar start cap rather than call the repair guy. The cap was swollen and blown. Now my room is like a dream again.

  • @craveking
    @craveking2 жыл бұрын

    I was ready to throw in the towel and pay for a new compressor, or worse, a new condenser until I watched this video. I figured I had nothing to lose by simply replacing the capacitor. $12 later, the AC is working great.

  • @electronicsNmore

    @electronicsNmore

    2 жыл бұрын

    Glad the video saved you money! Be sure to look over my extensive video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others. Thanks kzread.infoplaylists

  • @Rhaokirvar
    @Rhaokirvar11 ай бұрын

    Very helpful explanation. My AC died in the middle of Texas summer and couldn't get someone to take a look for 3 days. Ordered a capacitor on Amazon same day, went out to lunch, and replaced it that afternoon. Works better than ever! Thank you for the walkthrough!

  • @martinmyers8329
    @martinmyers83292 жыл бұрын

    Excellent ! You have helped me understand the mechanics of diagnosis. So great you are prepared to share your wealth of experience

  • @1100suziq
    @1100suziq4 жыл бұрын

    Tried the capacitor. No joy. I always forget the contacts. This one was at the compressor. Thanks a million!

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Glad it helped

  • @craveking
    @craveking2 жыл бұрын

    Easily one of the most helpful videos I have ever seen. This guy is a real pro.

  • @Calvinism1517
    @Calvinism15172 жыл бұрын

    Thank you. You just helped me discover a dishonest hvac company telling me I have a bad compressor. This video and the Fluke DMM set to capacitance clearly shows the dual run cap is defective.

  • @xXTECHxKNIGHTXx
    @xXTECHxKNIGHTXx3 жыл бұрын

    AWESOME VIDEO! Our unit is behaving EXACTLY like this. Its a brand new unit, but, we just went through a deep freeze here in Texas last week and lost power for 4 days, and now today we are in the high 70s and wanted to kick the AC on the house to only get hot air out the vents. Went outside to inspect the unit and heard the same hum/buzz sound for a second and nothing out of the compressor. I've put in a ticket with our property managers but may just try checking the capacitor myself.

  • @Tamonduando
    @Tamonduando2 жыл бұрын

    This a really good video. Simple, step by step. Even a fool like me could follow them! Thank you!

  • @julianl7937
    @julianl7937 Жыл бұрын

    Wow you're the best! Swapped my run capacitor exactly shown in this video. It worked! The fix was 20 mins and cost was only $35! Now I have a discharger too. Saved me so much money, thank you so much!

  • @electronicsNmore

    @electronicsNmore

    Жыл бұрын

    Great to hear!

  • @mr.invisible1400

    @mr.invisible1400

    10 ай бұрын

    Where did you get discharge tool?

  • @julianl7937

    @julianl7937

    9 ай бұрын

    @@mr.invisible1400 I just got a cheap "capacitor discharging tool" on Amazon for 20 bux, it's the white squarish one

  • @thecrazybishop1664
    @thecrazybishop16645 жыл бұрын

    Another instructive video, thanks for uploading!

  • @johnfair62
    @johnfair624 жыл бұрын

    Thank you very much. 6/19/2020 and I am watching your video so I can repair my AC unit. Your AWESOME!!!!!

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    You're welcome! Please return the favor by looking over my extensive video playlists below for many other videos of interest to you, use supplied Amazon links to support my channel when making purchases(No added cost to you), and share links to my videos with many others on social networking sites. Thank you John! kzread.infoplaylists

  • @johnalbrets6504
    @johnalbrets65045 жыл бұрын

    Great presentation. Now I know what to ask if I ever hear the "compressor needs replacing" diagnosis.

  • @caru3257

    @caru3257

    5 жыл бұрын

    If I tell you it needs to be replaced and give you a price, you are likely to need one.

  • @juanl5905
    @juanl5905 Жыл бұрын

    Dude you just saved me thousands… Thank you bro please keep helping people

  • @electronicsNmore

    @electronicsNmore

    Жыл бұрын

    Glad to hear that! You can return the favor by sharing my channel with others. Thank you

  • @ranckie5055
    @ranckie50552 жыл бұрын

    Excellent video sir, not only do you do a really great job of camera placement as you test, but your explanations as you go through the video are clear and concise. I have watched many, many A/C videos and you are the first one, at least that I have seen, to explain what "Herm" means on top of the capacitor. While I know that it stands for "Hermetically Sealed Compressor", I'm sure there are many viewers that had no idea what it stands for. You are an asset to the A/C community. Great job.

  • @electronicsNmore

    @electronicsNmore

    2 жыл бұрын

    Glad you liked and appreciated my video! Be sure to rate thumbs up, consider subscribing if you like a wide range of helpful and informative videos, and look over my extensive video playlists below for many other videos of interest to you. Taking one minute to share a link to my channel with others on social networking sites would be greatly appreciated. Thank you kzread.infoplaylists

  • @bigblue3568
    @bigblue3568 Жыл бұрын

    EVERYONE that owns a HVAC unit just go ahead pull the cover off the side of the unit, take note of the size capacitor and just order one and keep it on hand. Its not if it will fail but when and it always fails at the worse time like on a weekend or super hot time of month where it could be a day or two before a tech can come out. Just order one... or two

  • @TheWilferch

    @TheWilferch

    Жыл бұрын

    Also....take note of the contactor. Keep a spare of this too. A spare contactor and capacitor will likely be the main 2 items that will go bad after some years.

  • @tectalabyss
    @tectalabyss5 жыл бұрын

    Hello Doug. Another very well made how to.! Thank you for sharing. I Liked,Shared and added to Playlists. All my best. Bobby

  • @BobbyW00
    @BobbyW005 жыл бұрын

    Good How-To video. Explained very well. I liked your capacitor discharger. I am going to make up a couple. Thanks.

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Thanks for watching Bob! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others.

  • @DanArr1
    @DanArr14 жыл бұрын

    Great video. Explained and demonstrated in an easy to follow method. Keep them coming.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Glad it was helpful!

  • @rickbailey7183
    @rickbailey71835 жыл бұрын

    As usual, another excellent video!

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Thanks Rick! Be sure to check out my extensive video playlists, rate thumbs up, and share.

  • @johnmcfarlane5783
    @johnmcfarlane5783 Жыл бұрын

    Thank you! #1 straightforward!

  • @bigjohn9549
    @bigjohn954911 ай бұрын

    Best A/C video yet

  • @PBS-nm1uu
    @PBS-nm1uu5 жыл бұрын

    just found your site great presentation thanks please keep them coming

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Great to hear! Be sure to check out my other A/C videos below. kzread.info/dash/bejne/eK2olJl9ZZOYnMY.html kzread.info/dash/bejne/qKej3Mlxh5XaldY.html kzread.info/dash/bejne/eaZ4qqtyZ6vNpbA.html Please share my channel with many others. Thank you!

  • @pronounceword
    @pronounceword4 жыл бұрын

    I like your video very much. It's really great. I'll keep an eye on your channel. I am your fan and I will support you.

  • @ja1908
    @ja19084 жыл бұрын

    Awesome vid thank you .good to know knowledge.i appreciate your honesty.it go a long way .GOD BLESS YOU

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Glad you enjoyed it Jesse! Be sure to rate thumbs up, watch my wide range of videos, and share links to my videos with others. Thank you

  • @beerbrewer737
    @beerbrewer7375 жыл бұрын

    Great video. Thanks for posting.

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Thank you! Be sure to watch my other popular A/C videos below and share. kzread.info/dash/bejne/eK2olJl9ZZOYnMY.html kzread.info/dash/bejne/qKej3Mlxh5XaldY.html kzread.info/dash/bejne/eaZ4qqtyZ6vNpbA.html

  • @DANIELROMERO-cv3tu
    @DANIELROMERO-cv3tu4 жыл бұрын

    Good Job, Nice to view a rt to the point video.Thank you very informative

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Thanks Dan! Be sure to look over my other videos and most importantly share.

  • @olivergomez6202
    @olivergomez62024 жыл бұрын

    TANKS sr I like the video . IM SPANISH and let me tell you those videos are very good. Tanks again.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Great to hear! Be sure to watch my other A/C repair video below and share. Thanks kzread.info/dash/bejne/eK2olJl9ZZOYnMY.html

  • @NoorRefrigerationsystem
    @NoorRefrigerationsystem4 жыл бұрын

    Thank you sir I love this channel ❤❤❤❤❤❤

  • @garthhowe297
    @garthhowe2975 жыл бұрын

    Excellent video... thanks!

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Glad you enjoyed the video! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You

  • @fire2044
    @fire20443 жыл бұрын

    U solved my issue! You're fantastic. Thank u, I'm subscribed ☺.

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Great to hear! You can support my channel by sharing links to my videos, using provided Amazon links for purchases at no cost to you, watching my video playlists, or by making a small PayPal donation. Have a great day! Glad to hear you subscribed.

  • @Edmorbus
    @Edmorbus5 жыл бұрын

    excellent video

  • @conservativejones3537
    @conservativejones35373 жыл бұрын

    Awesome info. Great job. My outside unit is doing exactly this. Now I am armed.

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Good luck!

  • @mac5238
    @mac52384 жыл бұрын

    Great job, thanks for the info.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Thanks Mary! Be sure to share my channel with many others, and look over my extensive video playlists below for many other videos of interest to you. kzread.infoplaylists

  • @Joan503
    @Joan5033 жыл бұрын

    Good job sir.

  • @iamman4002
    @iamman40023 жыл бұрын

    A honest professional

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Honest professionals get plenty of work. :-) Be sure to look over my video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others on social networking sites. Thank you kzread.infoplaylists

  • @Govjetz
    @Govjetz8 ай бұрын

    Thanks I've been trying to find a video that demonstrated exactly what my problem was, I'll let you know if it works

  • @gartheligon140
    @gartheligon1405 жыл бұрын

    Had same symptoms, fan spinning slow, compressor hum and switches off. Two separate caps, fan cap read 1.5 comp cap no reading, replaced caps and that's all I paid for. Did it myself. 😁

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Great to hear my video helped! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You

  • @acedrafter
    @acedrafter5 жыл бұрын

    my one cent feedback; install the cap upside down so the short wires will reach the terminals; also to prevent moisture collection on the top of cap can; informative video; thanks for sharing; love your show.

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    That can be done since the can is well sealed. As for the moisture, that's not a concern because the compartment is well sealed from the elements once the cover is back on. Thanks for watching!

  • @caru3257

    @caru3257

    5 жыл бұрын

    Some capacitors recommend to be installed up.

  • @srobeck77

    @srobeck77

    4 жыл бұрын

    If u install it upside down, theres a risk the capacitor cud can slide down and cause a short.

  • @TheWilferch

    @TheWilferch

    Жыл бұрын

    It's usually not advised. The capacitor works by having a fluid in it.....if it leaks "upright"......it may work a bit longer until you fix it. If it leaks cap-side down, it may fail very quickly once it leaks....no time to order a spare from Amazon !!😄

  • @peterta1003
    @peterta10032 жыл бұрын

    I like to watch it. Thank you

  • @ralphwitt9975
    @ralphwitt99755 жыл бұрын

    very informative thanks!!!!!!!!!!

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    You're welcome Ralph! Be sure to watch my other A/C videos, look over my extensive video playlists below for other videos of interest to you, and most importantly share my channel with many others. Thanks kzread.infoplaylists

  • @XPerienceJoe
    @XPerienceJoe2 жыл бұрын

    Really like your video. I have a question what's the difference in the coding CBB65 and CBB65B?

  • @rgsauger
    @rgsauger4 жыл бұрын

    great video!!!

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Glad you liked it!! Be sure to look over my extensive video playlists below for many other videos of interest to you, use supplied Amazon links to support my channel when making purchases(No added cost to you), and share links to my videos with many others on social networking sites. Thank you kzread.infoplaylists

  • @jp7489
    @jp74894 жыл бұрын

    Thanks👍 my unit stop working early this morning found out it was the capacitor went to my nearest HVAC store picked one up for $18 and change installed new one now the compressor started up😁

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Glad my video helped, and saved you money! Be sure to look over my extensive video playlists below for many other videos of interest to you, use supplied Amazon links to support my channel when making purchases(No added cost to you), and share my videos with many others. Stay safe! kzread.infoplaylists

  • @tntheatingandairllc
    @tntheatingandairllc5 жыл бұрын

    Great video very helpful keep up the good work

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Thanks Terry! I have many videos on my channel that cover a wide range of subjects, so be sure to look over my extensive video playlists below for other videos of interest to you, and most importantly share my channel with others. kzread.infoplaylists

  • @daniels2937
    @daniels29375 жыл бұрын

    Everything you said was my scenerio. I replaced the capacitor. Then the contactor but the compessor never turned over. Contacted a so called pro and they came out. Hooked up testers and told me they chowed infinity and that my compressor was shot. He said let me see if I have a hard start kit. Went to his truck but didnt have one. Gave me 3 quotes for different set ups and left with my 90 dollar. trip charge fee. I was disgusted so they had the business owner come out and he also machine tested the xc and says theres no smoke and mirrors here and restated I needed a new compressor or unit. I saw your video and got a hard start kit. Hooked it up but nothing. I took a rubber mallet to the top and sides and the hard start kit did the trick. It started quicker then ever. It has been running better then when we bought the house 8 years ago if that is possible. Doesnt short cycle and starts very quickly. Hell the lights in my house dont dim either. My question is, should I seek my 90 dollars back? I mean I know nothing about HVAC but I feel screwed.

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Glad my video helped. Be sure to share my channel with many others. Thanks!

  • @jcimco9360

    @jcimco9360

    4 жыл бұрын

    How did you know what hard start kit to buy?

  • @daniels2937

    @daniels2937

    4 жыл бұрын

    @@jcimco9360 Luckily one of the places I called to come give me an estimate left me one in their mailbox. They could not come right away and told me to try it. It worked. Supco SPP5

  • @srobeck77

    @srobeck77

    4 жыл бұрын

    You cant always assume the hvac guy is trying to screw you. Some people just suck at their job or got trained in wrong. (U might have to diagnose the hvac guy yourself is all I'm saying, lol).

  • @JeremyCrescendo

    @JeremyCrescendo

    4 жыл бұрын

    Those guys were part changers. Not technicians. I'm currently in trade school for HVAC. Some people just suck

  • @PreachTheGospel07
    @PreachTheGospel074 жыл бұрын

    Thanks for sharing.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    You're welcome! Be sure to look over my extensive video playlists below for many other videos of interest to you, use supplied Amazon links to support my channel when making purchases(No added cost to you), and share links to my videos with many others on social networking sites. Thank you kzread.infoplaylists

  • @syd7479
    @syd74794 жыл бұрын

    Thanks clear information

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Happy to help! Be sure to look over my extensive video playlists below for many other videos of interest to you, use supplied Amazon links to support my channel when making purchases(No added cost to you), and share links to my videos with many others on social networking sites. Thank you! kzread.infoplaylists

  • @igotyourback209
    @igotyourback2092 жыл бұрын

    Great info ty

  • @electronicsNmore

    @electronicsNmore

    2 жыл бұрын

    You're welcome!

  • @seanwilkins2364
    @seanwilkins2364 Жыл бұрын

    Thanks to you for this video. My unit was running fine midday and then stopped cooling. The compressor and fan were not running. The compressor would try to start but the fan would not. A check of the capacitor produced zero results. Also my capacitor top was bloated. A new capacitor was the fix. Unit even sounds better IMO.

  • @electronicsNmore

    @electronicsNmore

    Жыл бұрын

    Great to hear!

  • @jay-c6128
    @jay-c61284 жыл бұрын

    Bravisimo!👏

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Grazie per l'attenzione! Si prega di condividere.

  • @erics9213
    @erics92135 жыл бұрын

    May also want to check the condition of the contactor; could be pipped.

  • @johnrokosky
    @johnrokosky3 жыл бұрын

    Fix my problem, thank you.

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Great to hear John! Be sure to rate thumbs up, consider subscribing if you like a wide range of helpful and informative videos, and look over my extensive video playlists below for many other videos of interest to you. Taking one minute to share a link to my channel with others on social networking sites would be greatly appreciated. Thank you kzread.infoplaylists

  • @johnrokosky

    @johnrokosky

    3 жыл бұрын

    @@electronicsNmore I, most assuredly, gave it a thumbs up. I had a turbo 200 (Multi cap)on hand and used that. It worked!! Thank you again!

  • @weiwu1929
    @weiwu19292 жыл бұрын

    I am watching this because my ac stopped working well two days ago. Before I call an expensive pro, I want to see if there’s anything that I can do. My ac blows nature air in house so does the outside unit. The compressor doesn’t sounds like working based on my poor ears. Your video is so great and easy to understand. Thank you! Would you please explain why the capacitor needs to be discharged? What might happen if I don’t? I just want to understand so I might follow better. Thank your sir!

  • @ncao

    @ncao

    Жыл бұрын

    All capacitors hold electrical charged, it needs to discharge it. buy a spare one. any capacitors can go bad at any time.

  • @hornet224
    @hornet2242 жыл бұрын

    The same thing happened to me right after my 1-year new TRANE service check. Turns out the contractor took out my good capacitor and installed a weak rusty one that quit after a week. All because I did not buy the service contract. Bought a new capacitor, installed it, and it has been running fine since.

  • @electronicsNmore

    @electronicsNmore

    2 жыл бұрын

    You saved yourself a couple hundred bucks.

  • @vertihvost7675

    @vertihvost7675

    Жыл бұрын

    Hope he rots in hell that contractor who does horrible acts

  • @TheATLFIREMAN
    @TheATLFIREMAN3 жыл бұрын

    Damn good work

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Glad you enjoyed the video Chuck! Be sure to look over my extensive video playlists below for many other videos of interest to you, and most importantly take one minute to share a link to my channel with others on social networking sites. Thanks kzread.infoplaylists

  • @SgtBFGunner
    @SgtBFGunner4 жыл бұрын

    Smart. Only video I've seen where someone discharges the capacitor first! That thing will bite you.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Thanks for watching Sarge!

  • @jerrycannon6940

    @jerrycannon6940

    3 жыл бұрын

    "Word of Advice Tv " is good too. He's on youtube

  • @stacycha8825
    @stacycha88253 жыл бұрын

    Another great video! My wall unit ac stopped blowing cold air. It hums for 3 sec and stops. And it repeats it a few times. It cannit seem to start the compressor. Not sure if the compressor is locked or the capacitor is faulty. Any idea?

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Sounds like a faulty capacitor, or stuck compressor.

  • @Leahlarios
    @Leahlarios3 жыл бұрын

    Same thing just happened to mine this past weekend. Tech replaced capacitor and he said the compressor was still binding or stuck. What's the easiest way to determine if he in fact replaced it? The unit is a 4 year old Goodman. Thanks

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Thanks for watching!

  • @rbnjr
    @rbnjr2 жыл бұрын

    The quality of the original capacitor makes a huge difference in how long they last. If you change out the original cap with a quality part and test it im guessing you will not need a hard start kit. I have purchased extra caps since this type of thing is common and easy to change out the cap yourself. Be safe. ( regular routine maintenance of a/c unit performed)

  • @MarkSchuster-ym3iy
    @MarkSchuster-ym3iy3 жыл бұрын

    How do you determine the wires that go to the capacitor? I understand the cap is marked but I want to make sure the wires are where they belong .

  • @javivivero5119
    @javivivero51194 жыл бұрын

    Hi Nmore, great video and Thanks for take your time to make this. I would like to know if you can please help me with something? I have a westinghouse GP5RD-060K AC (5tons), this season the AC had a leaked of gas, now is fixed, but, started to fail just in the mornings, between 8 and 9 am, the compressor make a big noise and does not compress, when happen that, I turn off the compressor, wait few minutes, and turn on again the compressor and works fine all day, even in the night. Do you know what can cause this? Greartings from Mexicali, Mexico.!

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Check the capacitor.

  • @mrsemifixit
    @mrsemifixit5 жыл бұрын

    Could you explain why the capacitor is used for starting/running the compressor and for running the fan?

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    The start capacitor(if used) gives a fan motor the torque it needs to start spinning then stops; while the run capacitor remains in-circuit giving the motor extra torque when needed. If a run capacitor becomes faulty, then a motor may still be able to turn on, but the running amperage will be higher than normal causing the motor to run hot and have a short life expectancy.

  • @azimmey
    @azimmey4 жыл бұрын

    Dang good video! My heat pump just started acting up in heat mode. It actually started yesterday and blew the breaker. I reset it and could hear a slight hum and a weird flutter noise so I thought maybe the compressor went bad. I put it in AC mode and the compressor kicked in right away. I put it back in heat mode and the compressor did start up but the next AM it was humming again. I did replace the dual capacitor last spring but it made a loud POP when the unit came on and found out it was the contactor was bad also. I replaced the contactor and all last summer the AC ran great. So now I have to go get a real meter and check the capacitor and hope that is it. I did not replace the capacitor when it made that pop because the AC worked.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Does the reversing valve click when switched to heat? It's not the capacitor if it works fine for cooling. Tap into the heat pump wires with a DMM and check the AC input voltage. Normally 24-27VAC. Try tapping on the solenoid with the power off to the outside unit, and the thermostat set to heat. After doing that, turn on the outside unit.

  • @alexb8270
    @alexb82703 жыл бұрын

    Awesome!!!

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Glad you think so Alex! Be sure to rate thumbs up, consider subscribing if you like a wide range of helpful and informative videos, and look over my extensive video playlists below for many other videos of interest to you. Taking one minute to share a link to my channel with others on social networking sites would be greatly appreciated. Thanks kzread.infoplaylists

  • @craigwflys
    @craigwflys3 жыл бұрын

    Great video. A few days ago I decided to test my RV's AC (unit is like new). Like a fool I started it twice without waiting for the system to equalize (maybe only 2 minutes). First two attempts were successful. The third attempt something bad happened. Fan comes on normally compressor kicks on sounding about 50% slow and quiet (pulling a ton of amps) then after about 4 seconds the systems quits the attempt. About 12 seconds later the systems tries to start the compressor again with the same results. I don't have a meter to test the run capacitors level. It's a ton of money just to have a RV tech to come out and diagnose. Does this sound like I sort of killed the cap? Or did I damage the compressor?

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Try wacking the side of the compressor with a rubber mallet just as you power it up. It may be stuck.

  • @craigwflys

    @craigwflys

    3 жыл бұрын

    No I went on the roof of the trailer and it's starting up (it's vibrating) but it's just running like at half speed. Couldn't it be that the capacitor just isn't giving it of enough of a kick start fully to get it up and running? I'm praying I didn't damage the compressor otherwise as you know I'm looking at having to replace the entire unit.

  • @kwhitney22
    @kwhitney225 жыл бұрын

    You rock

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Glad you liked the video! Be sure to check out my other highly popular A/C videos and most importantly share my channel with others. Thank you kzread.info/dash/bejne/eK2olJl9ZZOYnMY.html kzread.info/dash/bejne/eaZ4qqtyZ6vNpbA.html kzread.info/dash/bejne/qKej3Mlxh5XaldY.html

  • @desifre3544
    @desifre35444 жыл бұрын

    hello very nice channel very useful thank you for good useful shares i have a question i want to work with the air conditioner compressor externally I connected (+) L directly to c /// I made parallel connection from (-) N to capacitor // R I made a connection from the other leg of the capacitor or fuse blows or the compressor runs for 2 seconds 5/6 seconds stops and rings again for 2 seconds and it gets very hot.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Should be very easy to do. Trace where the compressor wires go in your unit, then apply 240V.

  • @shanecook7280
    @shanecook7280 Жыл бұрын

    Oh yeh it almost started up once when I used the hard start it made a low noise wonder if I got to small of one . I may need to get a larger hard start .

  • @chrisszeles5850
    @chrisszeles58502 жыл бұрын

    @electronicsNmore - this is rad. at around 9:13 on this video, the other AC unit appears to be stopping and makes a loud knocking sound.... this is what's occuring on my home unit (Lennox) that is 1.75 years old. None of the others in the neighborhood make this sound. I am not sure what the issue is and I've been told by a local "builder warranty" co its a compressor, which they don't recommend replacement. Do you have any advice for me - replace/don't compressor or possibly something else. the unit runs great, but when it stops it makes a loud knock on turn down. I'd rather replace small, lesser expensive parts now, then wait till later. And FYI... the waranty co does not want to do work. Please help.

  • @waitwhat9689
    @waitwhat96893 жыл бұрын

    Great Video, what would you have charged a "customer" for that service? What would the cost to a homeowner?

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    75-100 plus the capacitor cost.

  • @FreedOrDieTrying
    @FreedOrDieTrying5 жыл бұрын

    Thanks much !! Great video

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    You're welcome Sam! Be sure to watch my other home and auto A/C repair videos and share. Thank you

  • @FreedOrDieTrying

    @FreedOrDieTrying

    5 жыл бұрын

    @@electronicsNmore man!! My case was a copycat of yours in this video..my A/C has given up last night, ive watch many videos but no help .. I literally followed every step of yours, and went straight to buy a new capacitor . Now I am enjoying my A/C while writing this reply. Thanks again man. BTW I subbed.👍👍👍

  • @jcimco9360

    @jcimco9360

    4 жыл бұрын

    @@FreedOrDieTrying did you also install a hard start?

  • @gg_6661
    @gg_66613 жыл бұрын

    Hello 👋 I see your videos and I have a problem on my a/c unit and was wondering if you can give me tips on what it can be … my a/c unit turns on and fan works but it’s not blowing cold air in the house and I noticed the suction pipe is not cold. Thank you for your time.

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Compressor is not running.

  • @gg_6661

    @gg_6661

    3 жыл бұрын

    @@electronicsNmore can it be the capacitor ?

  • @andylamm5571
    @andylamm55715 жыл бұрын

    This is a very well made video. You are very Intelligent about AC Units. I'm an Idiot 😂 when it comes to Electronics and Multimeters. And the things you said made sense but it was WAY above my head... let's just say, I wish you were my Friend! LOL... Because my Compressor isn't working and I've got a feeling I'm going to get one of THOSE dishonest people that's tells me I need a NEW $2,000 Unit.... JEEPERS. But great Video...

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    My better video: kzread.info/dash/bejne/eK2olJl9ZZOYnMY.html

  • @daniels2937

    @daniels2937

    5 жыл бұрын

    2000? quotes are more like 3500. Theres really nothing to it. Check the connections, change the capacitor and or contactor about 25 bucks. Make sure power is off first. Dont ask me how I know.

  • @marlonr1521
    @marlonr15213 жыл бұрын

    I found a 45/5 Farads in my a/c unit do you think that perhaps is too low and that's why the compressor doesn't start on? I does exactly the same ,like the one I. Your video

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Check all connections on the capacitor and compressor, and make sure the capacitor is close to the rated value.

  • @marlonr1521

    @marlonr1521

    3 жыл бұрын

    @@electronicsNmore thanks 😊 I followed the steps but also installed a new capacitor and it works 👍I love your tutorial videos

  • @World-Superbike
    @World-Superbike4 жыл бұрын

    Hey my friend, hopefully you could help. I don't believe that my compressor is running. Only ambient air through vents, so i left it running for a while. Because so hot in my house i wanted to leave the air handler in home running so i went outside and pulled the fuse for the condensor unit. Fan stopped but heard a humming from the unit?? Does the fuse generally only remove power to the fan unit and not the compressor also?? If so could compressor be stalled? Sound was like motor dropped a phase..

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Watch my other video. Thank you! kzread.info/dash/bejne/eK2olJl9ZZOYnMY.html

  • @Maureentv1
    @Maureentv1 Жыл бұрын

    What is helpful to hear the outside condenser before you fix it?!

  • @toploadtele
    @toploadtele3 жыл бұрын

    5-Stars! ★★★★★

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Thank you! Be sure to rate thumbs up, share the video link with others, and check out my other Central A/C repair video below. kzread.info/dash/bejne/eK2olJl9ZZOYnMY.html

  • @CJ-rj9tg
    @CJ-rj9tg4 жыл бұрын

    Well, thanks my friend. 20 years back I had this same issue...got the same unit still running. Of course I knew nothing about this field back then. The tech didn’t try anything else he just sold me a hard start kit. Never did he attempt to install a much cheaper new capacitor. He had a license to steal..I didn’t 🤷🏽‍♂️

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Many licenses to steal out there! Be sure to check out the very wide range of videos on my channel, and most importantly share my YT channel with others. Thanks CJ! kzread.infoc/playlists

  • @aurthorthing7403
    @aurthorthing74035 жыл бұрын

    Did you say 7 or 70 for the compressor side of the cap?

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    70uF

  • @powerofshah3
    @powerofshah35 жыл бұрын

    American made amrad capacitor..nice!

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Thanks for watching!

  • @lglturbo
    @lglturbo Жыл бұрын

    I have a 45/5 uF cap used on a 4 ton 30 year old carrier condenser. What hard start kit do I use for this?

  • @electronicsNmore

    @electronicsNmore

    Жыл бұрын

    Hard start kits are sold based on the tonnage

  • @lglturbo

    @lglturbo

    Жыл бұрын

    @@electronicsNmore I have a 4 ton carrier, so which hard start kit with the built-in relay should I get? Thx!! (love your vids!!)

  • @umaiyalcreation1923
    @umaiyalcreation19234 жыл бұрын

    wow superb ... s i got it

  • @FSM_Reviews
    @FSM_Reviews5 жыл бұрын

    My Carrier unit is doing the same. Got a replacement capacitor ordered. Hopefully can be fixed.

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Hopefully that's the problem. Thanks for watching!

  • @FSM_Reviews

    @FSM_Reviews

    5 жыл бұрын

    @@electronicsNmore I hope so too. It's the middle of summer where I live. Got no A/C right now. I have 4 fans scattered around the house.

  • @FSM_Reviews

    @FSM_Reviews

    5 жыл бұрын

    @@elegant6066 Got the replacement capacitor for the outdoor unit. AC is working again! Still love my fans, though. Kept me through some tough times.

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    @@FSM_Reviews Great to hear! Be sure to return the favor by sharing my channel with many others. Thank you

  • @miketgb179
    @miketgb179 Жыл бұрын

    When you found the red wire was restricting the height of the capacitor meaning you had to have cardboard as an insulator between the can and contactor you should as a diligent repair man have replaced the red wire with a longer one. After all you had both ends disconnected at some point. That also would have meant you could raise the capacitor up away from the contactor AND not have to reuse the burned contactor blade as there was a second blade but that was too close to the then very low capacitor.

  • @electronicsNmore

    @electronicsNmore

    Жыл бұрын

    Easy to do when you have one on hand. :-). I was helping a friend.

  • @johndough23
    @johndough234 жыл бұрын

    2:15 you said you were going to install a hard start kit. That was never referenced I assume you punted on adding that? I do have a question on this Hard Start thing however which I am sure you can answer...In your opinion does adding one of these degrade your existing capacitor? I installed one on my system and all is well except the unit is very noisy when coming on. You can clearly hear the click, 2-3 times louder than before. The lights in the house as well flicker. This was not the case pre-hard start. I was told these HS capacitors eliminate flicker not increase it. I am confused. What's your opinion on this, thanks.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    I found the problem with the A/C, so there was no need for the hard start kit. The kit when installed properly, will not cause any problems. Make sure the main lugs in your breaker panel are tight, if they are, then call up the power company. You have a bad connection between the house and utility pole. Lights should not flicker.

  • @johndough23

    @johndough23

    4 жыл бұрын

    Thanks

  • @CoVaTennis
    @CoVaTennis3 жыл бұрын

    any tips on if i hear a “clicking” sound at the condenser unit when setting the thermostat to cool and/or turning thermostat to off? I hear the click and the condenser/compressor stay off

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Make sure 240v is present at the contactor. If it is, the contact points may have damage from arcing or a dead bug inbetween them.

  • @CoVaTennis

    @CoVaTennis

    3 жыл бұрын

    @@electronicsNmore ok thanks for the tip. If it is 240v would you reco that I’d need to replace the contactor unit?

  • @shanecook7280
    @shanecook7280 Жыл бұрын

    Question what if I’m only getting 220 I think I was getting 221 on my t1 l1 off contact. I need to see what is going in tomorrow. I changed compactor the last one was bad . It was supposed to be 45 /5 I had 11 /5 I put a new one on nothing. Checked wires to compressor ohmes out compressor. Seemed fine is it locked up ? I was getting a very warm feeling on the suction line while trying to cool . I am baffled . I don’t have alot of experience I installed a lot and 1yr of service now working at apartment to practice my craft . If you can help . Let me know if it’s a low power issue I had electrical problems burn 🔥 up compressors before . They said this unit was running last summer . I can’t get it on .

  • @alexchong1979
    @alexchong19792 жыл бұрын

    If the fan star running very slow about few min ~ will it issue of capacitor?

  • @electronicsNmore

    @electronicsNmore

    2 жыл бұрын

    Bad cap or bad fan motor.

  • @azimmey
    @azimmey4 жыл бұрын

    My unit was making that same noise but now the unit blows the breaker any time I try and turn it on. I took off the c wire off the compressor and it stopped blowing the fuse and the fan runs. I banged on the a/c compressor and hooked everything back up and it immediately blew the breaker again. Guess the compressor locked up now. 17 year old trane xl that was kept clean and on the shady side of the house. nOT HAPPY. First video to replicate the exact sound it was making before the lockup. Thanks

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Sounds like the compressor is gone.

  • @rustyrepairs2565
    @rustyrepairs25655 жыл бұрын

    How does a capacitor go bad? I'm not savvy in electrical stuff so I must ask questions.

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Nothing lasts forever. Heat plays a role. The very thin dielectric material inside the capacitor between the thin aluminum layers can deteriorate causing a short, or the layers can start to separate causing the value to drop(even make the capacitor become "Open"). Thanks for watching!

  • @rustyrepairs2565

    @rustyrepairs2565

    5 жыл бұрын

    @@electronicsNmore thank you for the explanation. Love your channel!

  • @srobeck77

    @srobeck77

    4 жыл бұрын

    It's a normal wear item. Not if, just a matter of when. Like the hot surface ignitors in furnaces. Save yourself money and change them out yourself after no more than 10 years.

  • @Sal112350

    @Sal112350

    3 жыл бұрын

    @@srobeck77, I agree, whenever you find them out of spec, might as well change it, it help the compressor last longer.

  • @teh60
    @teh605 жыл бұрын

    The way that terminal looked on the contactor, I would have replaced that also. But it looks like you got it going, nice job.

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    No need to replace it. The only time I replace a contactor, is if the coil inside becomes open circuit or the contacts become damaged enough by arcing to stop full power from crossing over. Thanks for watching

  • @actechformallyyomama746

    @actechformallyyomama746

    5 жыл бұрын

    Their were 3 other male connections on that circuit of the contactor. Instead of cleaning the one and reusing it. Also the points of a contactor are made of silver. The silver is soldered to either brass or copper. If the points become pitted or burned the silver is getting thin. The thickness of the silver is based on the amp rating of the contactor. When the silver gets thin you could have contact with the brass or copper. This will arch and probably weld shut. The compressor would not shut off or voltage would be affected both of which could damage the compressor.

  • @matthewmccullough6234
    @matthewmccullough62345 жыл бұрын

    I would install the 521 Hard Start Kit for much better recycling on compressor

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    Yes, that was added later. :-)

  • @lissam8988
    @lissam89883 жыл бұрын

    We just got a brand new carrier system just a couple of weeks ago and it's already broken down and it hasn't even been that hot. 🙁 Does this strange starting sound and then like a throttle but the fan never works.

  • @electronicsNmore

    @electronicsNmore

    3 жыл бұрын

    Call the company back.

  • @tmst2199
    @tmst21994 жыл бұрын

    I cleaned the condenser coil on car's A/C and the high-side pressure dropped from 250 to 175 PSI at idle.

  • @billschmidt1182
    @billschmidt11824 жыл бұрын

    Found a mouse nest in my panel and the connector to the Starting Cap was hanging by a thread due to corosion.

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Sounds like an easy fix. :-)

  • @lilshik69
    @lilshik694 жыл бұрын

    Wait I'm confused how come on the new capacitor it showed no omes on the multimeter. It showed an open lead... wouldn't that mean it's bad??

  • @hernanpena9590

    @hernanpena9590

    4 жыл бұрын

    It is no the same capacitor

  • @lilshik69

    @lilshik69

    4 жыл бұрын

    What you mean..he's tested the new one and it showed nothing...the old one was the smaller one and the new was the taller

  • @jcimco9360
    @jcimco93604 жыл бұрын

    just getting started mine is intermittent. starts then goes out after about 1 min. goes on and stays. Sometimes it takes 2 cycles. How do you determine which Hard start kit to get?

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    Could be a few things, but a fault with the thermostat, contactor, or compressor/compressor thermal cut-off is possible.

  • @jcimco9360

    @jcimco9360

    4 жыл бұрын

    @@electronicsNmore could my capacitor be on the way out. havent checked that yet

  • @electronicsNmore

    @electronicsNmore

    4 жыл бұрын

    @@jcimco9360 I was under the impression you already did the tests......

  • @jcimco9360

    @jcimco9360

    4 жыл бұрын

    @@electronicsNmore I checked the capacitor and it is bad. I got a new one, checked good and installed. Sometimes it starts for a second or two and goes off after about a minute it comes back on and stays on. Would I benefit from a hard start kit? and how do I determine which one to get. My CAP is 45/5 370 vac

  • @lglturbo

    @lglturbo

    Жыл бұрын

    Did you ever determine or get feedback on what hard start kit to get? I have the same cap size as you.

  • @missygold9315
    @missygold93155 жыл бұрын

    Mine started making a zapping noise in the inside breaker box for about 2 months until 1 day it kept doing it all day and the AC wasn't cooling the house thank God I have a friend who is a AC man such as yourself because I am disabled and live on a very small budget well I finally was able to get a hold of him he came out and it was the part you just changed it was called 60+5 well the next day he came out and fixed and my AC is now working thank God but I have a question it makes that zapping noise still but only once n a while could you tell me what is causing that my Ac unit is 8 years old and I keep the inside coils clean and always keep changing the filter I go to a AC place and I buy this can of stuff that I just spray on the coils and scrub it no water required I'm sure you know what I'm talking about I do that twice a year besides the question I asked you above is there anything I'm suppose to be doing to keep the outside clean I'm disabled and my husband of 37 years left me and I don't have anyone to help me so I can't afford for it to break hope to hear from you soon and thanks so much for sharing your knowledge it truly means a lot especially to your subscribers such as myself who live on $725.00 a month O and he charged me only for the part which was 38 dollars I believe but he did say the same exact thing you said that someone else probably would have told me it was my compressor which I believe if that goes out wouldn't it be cheaper just to buy another unit ? Anyway thanks again for all you do

  • @electronicsNmore

    @electronicsNmore

    5 жыл бұрын

    The buzz noise is due to high current flowing through an older circuit breaker.

  • @missygold9315

    @missygold9315

    5 жыл бұрын

    @@electronicsNmore but my home and the AC are just 8 years old would you suggest changing that breaker and thank you so much for fast response your awesome

  • @missygold9315

    @missygold9315

    5 жыл бұрын

    @@electronicsNmore I'm just trying to stop anything else from breaking on me

  • @missygold9315

    @missygold9315

    5 жыл бұрын

    @@AWIERD1 thanks so much I will try that asap

  • @actechformallyyomama746

    @actechformallyyomama746

    5 жыл бұрын

    You should have your AC friend check the wires in the breaker box. Hearing sounds like that could be a loose connection. Breaker boxes should not make sounds.

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