Central A/C Compressor Won't Start Up(Stuck/Momentary Hum )
ฝัง
- เผยแพร่เมื่อ 29 ส.ค. 2024
- 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...
(Link to product & money saving coupon code is located in the video description area of the video link above)
Dual Run Capacitors:
amzn.to/2QjvksK
Hard Start Kits:
amzn.to/2wWfCeA
(Amazon Affiliate Links)
**Help me make more videos by visiting the link below. All donations, big or small, would be greatly appreciated. Thank you!
paypal.me/elect...
Bobby Tectalabyss. Thanks for your generous $6 donation!
**For GREAT deals(Usually cheaper than EBAY) on other electronics, drones, automotive tools, household items, phone accessories, locksmith tools, & much more, please visit the link below and SAVE IT AS A BOOKMARK on your computer or smartphone to Banggood for future purchases. (Your purchase supports my channel!)
Home Page: bit.ly/2wDbRdi
Flash Deals: bit.ly/2eBLkVI
*Try these money saving coupon codes: affiliate6 or aff7off or f8aaf1 or 781622 or 5719ed or elec* or ask if other codes are available!
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".
Thanks For Watching!
**If you enjoy watching my videos, then be sure to SUBSCRIBE, POST LINKS to my videos on other websites & blogs, rate "THUMBS UP", and check out my video playlists. Doing so helps to ensure that many more videos will be uploaded to my YT channel in the future. (Views are absolutely essential to ensure this channel remains in an active state)**
Be sure to watch my HIGHLY POPULAR Central A/C Full Troubleshooting video below. Thanks!
th-cam.com/video/Fyt27D502lc/w-d-xo.html
My compressor is doing the same thing as in the video, a friend of mine is going to check it this afternoon!
Good luck! Be sure to share my channel with many others. Thanks
Can I download this video for my elearning module?
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!
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.
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
th-cam.com/users/electronicsnmoreplaylists
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
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.
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.
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!
Great to hear!
Where did you get discharge tool?
@@mr.invisible1400 I just got a cheap "capacitor discharging tool" on Amazon for 20 bux, it's the white squarish one
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.
Easily one of the most helpful videos I have ever seen. This guy is a real pro.
Tried the capacitor. No joy. I always forget the contacts. This one was at the compressor. Thanks a million!
Glad it helped
Excellent ! You have helped me understand the mechanics of diagnosis. So great you are prepared to share your wealth of experience
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.
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
th-cam.com/users/electronicsnmoreplaylists
Great presentation. Now I know what to ask if I ever hear the "compressor needs replacing" diagnosis.
If I tell you it needs to be replaced and give you a price, you are likely to need one.
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.
Glad my video helped. Be sure to share my channel with many others. Thanks!
How did you know what hard start kit to buy?
@@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
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).
Those guys were part changers. Not technicians. I'm currently in trade school for HVAC. Some people just suck
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.
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!
Some capacitors recommend to be installed up.
If u install it upside down, theres a risk the capacitor cud can slide down and cause a short.
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 !!😄
Dude you just saved me thousands… Thank you bro please keep helping people
Glad to hear that! You can return the favor by sharing my channel with others. Thank you
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. 😁
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
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.
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.
You saved yourself a couple hundred bucks.
Hope he rots in hell that contractor who does horrible acts
Thank you very much. 6/19/2020 and I am watching your video so I can repair my AC unit. Your AWESOME!!!!!
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!
th-cam.com/users/electronicsnmoreplaylists
This a really good video. Simple, step by step. Even a fool like me could follow them! Thank you!
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)
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!
All capacitors hold electrical charged, it needs to discharge it.
buy a spare one. any capacitors can go bad at any time.
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😁
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!
th-cam.com/users/electronicsnmoreplaylists
Smart. Only video I've seen where someone discharges the capacitor first! That thing will bite you.
Thanks for watching Sarge!
"Word of Advice Tv " is good too. He's on youtube
Thanks I've been trying to find a video that demonstrated exactly what my problem was, I'll let you know if it works
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.
Great to hear!
Good How-To video. Explained very well. I liked your capacitor discharger. I am going to make up a couple. Thanks.
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.
TANKS sr I like the video . IM SPANISH and let me tell you those videos are very good. Tanks again.
Great to hear! Be sure to watch my other A/C repair video below and share. Thanks
th-cam.com/video/Fyt27D502lc/w-d-xo.html
Best A/C video yet
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.
Easy to do when you have one on hand. :-). I was helping a friend.
Another instructive video, thanks for uploading!
Awesome info. Great job. My outside unit is doing exactly this. Now I am armed.
Good luck!
A honest professional
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
th-cam.com/users/electronicsnmoreplaylists
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 🤷🏽♂️
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!
th-cam.com/users/electronicsnmorec/playlists
Awesome vid thank you .good to know knowledge.i appreciate your honesty.it go a long way .GOD BLESS YOU
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
Thank you! #1 straightforward!
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.
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.
Great video. Explained and demonstrated in an easy to follow method. Keep them coming.
Glad it was helpful!
Hello Doug. Another very well made how to.! Thank you for sharing. I Liked,Shared and added to Playlists.
All my best.
Bobby
Really like your video. I have a question what's the difference in the coding CBB65 and CBB65B?
The way that terminal looked on the contactor, I would have replaced that also. But it looks like you got it going, nice job.
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
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.
As usual, another excellent video!
Thanks Rick! Be sure to check out my extensive video playlists, rate thumbs up, and share.
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.
Here’s a tip if u can’t read the ratings on the capacitor the 2 spade terminal is fan 3 is herm and 4 is common
just found your site great presentation thanks please keep them coming
Great to hear! Be sure to check out my other A/C videos below.
th-cam.com/video/Fyt27D502lc/w-d-xo.html
th-cam.com/video/vsozg8W2tes/w-d-xo.html
th-cam.com/video/GrDHI97HguM/w-d-xo.html
Please share my channel with many others. Thank you!
30+ years veteran HVAC tech here. As good as this advice is..... Please call a professional.
LOL. Totally expected comment from an HVAC Tech.
Hell the only concern is that the electricity is cut off. After that I say watch these videos, learn something, then fix it yourself. Feels good saves a boatload. What have you got to lose?
I could see it from both sides here. 220 volts can be dangerous or hooking up the wires incorrectly by some homeowner who over estimated their ability to fix something.
@@srobeck77 Just because someone is a homeowner doesn’t mean a person isn’t knowledgeable. Hell there are boat loads of stupid so-called techs out there.
@@greenidguy9292 9.9 times of 10, home owners are more dangerous than a professional. So yur like .1% right I guess?
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
Sounds like the compressor is gone.
May also want to check the condition of the contactor; could be pipped.
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 .
Good Job, Nice to view a rt to the point video.Thank you very informative
Thanks Dan! Be sure to look over my other videos and most importantly share.
I have same symptom. Compressor tries to kick on with a hum for few sec but won't. Cooling fan runs. New condenser about 8 years old. When I hook up manifold gauges both read almost same temp without system running. Which I believe means only vapor is in the system signaling very low refrigerant. So I am thinking my prob is low refrigerant but how can I charge it if I can't get the compressor to kick on? How do I bypass the low pressure switch? If that isn't recommended do I just need to draw down and pull vacuum on system and recharge as if new? Thank you. I am in Texas and now not good time for a to go down.
Great video. Thanks for posting.
Thank you! Be sure to watch my other popular A/C videos below and share.
th-cam.com/video/Fyt27D502lc/w-d-xo.html
th-cam.com/video/vsozg8W2tes/w-d-xo.html
th-cam.com/video/GrDHI97HguM/w-d-xo.html
I like to watch it. Thank you
What is helpful to hear the outside condenser before you fix it?!
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...
My better video:
th-cam.com/video/Fyt27D502lc/w-d-xo.html
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.
U solved my issue! You're fantastic. Thank u, I'm subscribed ☺.
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.
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 .
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
Thanks for watching!
Excellent video... thanks!
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
With the damage to that terminal I would have been tempted to examine the contactor contacts for heat damage ,Just because it runs does not mean that they are a 100%, the problem could repeat later.
The female blade connector was loose and corroded due to years of high humidity. The contactor was fine.
excellent video
Great Video, what would you have charged a "customer" for that service? What would the cost to a homeowner?
75-100 plus the capacitor cost.
Before assuming the capacitor is discharge I recommend using a multimeter and properly check the capacitor
If you short the terminals before touching them, then there's no need to do that.
@electronicsNmore I guess we both have a point I appreciate your wonderful video. Here's my question if you assume the resistor discharge the capacitor and you short the terminals on the capacitor what worst you think could happen?
Measured the compressor - good, measured the capacitor - good, have a hard start kit installed. And nothing! My compressor seems to be stuck. I hear it trying to come on. Is it just seized up??? And if it were seized up wouldn't I get bad reading across the common and start, run etc...
Thank you sir
I love this channel
❤❤❤❤❤❤
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.!
Check the capacitor.
Fix my problem, thank you.
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
th-cam.com/users/electronicsnmoreplaylists
@@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!
Good job sir.
Great job, thanks for the info.
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.
th-cam.com/users/electronicsnmoreplaylists
When the wires are short like that you can mount the cap upside down and that solves the short wire problem and keeps the cap away from the contactor.
Yes, but I have seen a bulging run cap leak in the past, so I don't like doing that.
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 !!😄
American made amrad capacitor..nice!
Thanks for watching!
Hope you checked the outdoor coil. Dirty condenser coils cause heat not to escape from the refrigerant.. thus the compressor overheats and over years overheats capacitor. Also cheaper equipment use cheaper parts and thus creates equipment breakdons.
Generally, dirty coils wont trip the compressor unless it's very extreme (like a plastic garbage bag over it or a thick coating of white cotton seed blanket).
@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.
I would install the 521 Hard Start Kit for much better recycling on compressor
Yes, that was added later. :-)
Great video very helpful keep up the good work
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.
th-cam.com/users/electronicsnmoreplaylists
This is exactly what my a/c unit is doing. When I measure across the output of the contractor to the wire on the cap coming from the compressor I get 240 Vac. Then when I hear the hum, which occurs every minute and a half, the 240 Vac drops to 0 Vac and returns back to 240 Vac. Thought I had a bad compressor.
I don't think you're measuring correctly. Just make sure the switched side of the contactor has 240V across the terminals when activated. You either have a faulty capacity or stuck compressor.
The capacitor or other control thingy is always the problem most of the time so why don't they simply replace them yearly? They are in outside unit exposed to weather and after bad storms they gets corroded
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?
Try wacking the side of the compressor with a rubber mallet just as you power it up. It may be stuck.
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.
Unfortunately when the capacitor fails it can affect the compressor too. Some shitty compressors dont include thermal and overload protection and prolonged seized state can damage the winding.
Of course well engineered unit should just end up tripping thermal or current breakers over and over with no further damage.
I've never seen a Central A/C compressor that didn't have built-in overload protection. Thanks for watching!
Not all motors- compressors come with internal protection. Those that don’t need external protection. Residential compressors do come with internal protection. Unless it is an 06D semihermatic. Very rare on residential. These will have external protection.
Great info ty
You're welcome!
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?
Sounds like a faulty capacitor, or stuck compressor.
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 .
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.
Compressor is not running.
@@electronicsNmore can it be the capacitor ?
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.
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.
Thanks
My Carrier unit is doing the same. Got a replacement capacitor ordered. Hopefully can be fixed.
Hopefully that's the problem. Thanks for watching!
@@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.
@@elegant6066 Got the replacement capacitor for the outdoor unit. AC is working again! Still love my fans, though. Kept me through some tough times.
@@FSM_Reviews Great to hear! Be sure to return the favor by sharing my channel with many others. Thank you
How does a capacitor go bad? I'm not savvy in electrical stuff so I must ask questions.
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!
@@electronicsNmore thank you for the explanation. Love your channel!
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.
@@srobeck77, I agree, whenever you find them out of spec, might as well change it, it help the compressor last longer.
Thanks for sharing.
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
th-cam.com/users/electronicsnmoreplaylists
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.
Call the company back.
very informative thanks!!!!!!!!!!
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
th-cam.com/users/electronicsnmoreplaylists
If...(after you kill the power from ALL the potential sources...incl 24VAC power)......can you safely measure the capacitor health (like you did to measure uF).....while the capacitor is installed and wired up? Just askin for any gotchas.......
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
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.
@@electronicsNmore ok thanks for the tip. If it is 240v would you reco that I’d need to replace the contactor unit?
Could you explain why the capacitor is used for starting/running the compressor and for running the fan?
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.
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
The buzz noise is due to high current flowing through an older circuit breaker.
@@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
@@electronicsNmore I'm just trying to stop anything else from breaking on me
@@AWIERD1 thanks so much I will try that asap
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.
great video!!!
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
th-cam.com/users/electronicsnmoreplaylists
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.
Should be very easy to do. Trace where the compressor wires go in your unit, then apply 240V.
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..
Watch my other video. Thank you!
th-cam.com/video/Fyt27D502lc/w-d-xo.html
Thanks clear information
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!
th-cam.com/users/electronicsnmoreplaylists
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
Check all connections on the capacitor and compressor, and make sure the capacitor is close to the rated value.
@@electronicsNmore thanks 😊 I followed the steps but also installed a new capacitor and it works 👍I love your tutorial videos
My AC stopped blowing cold air, and I suspected the capacitors because this has happened before. But this time, I replaced them and now the compressor will turn on and I get cold air, but only for one cycle. As soon as the thermostat shuts off the AC then the next time it goes to cycle on, the compressor refuses to start and I get warm air again. Anyone know what could cause this?
If the fan star running very slow about few min ~ will it issue of capacitor?
Bad cap or bad fan motor.