DIY Fix AC Compressor Fan Not turning On, Just Humming
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- Опубликовано: 28 июл 2024
- Is your air conditioner not blowing cold air? In this video we show you an easy to follow DIY Fix for AC Compressor Fan Not turning On, Just Humming. Is your ac not cooling? ac not blowing air? Maybe your ac fan not turning on? If your ac fan is not running and you check outside the house and your ac compressor wont turn on, you look down into the grate and see the AC compressor fan is not spinning, that is why your ac is not blowing air. We'll help you resolve this issue of your ac compressor fan not turning on.
You may have an issue with the ac run capacitor, and we'll show you how tp perform the AC compressor motor run capacitor test, and save $200 by avoiding the AC Repair company, whose visits often mean big bucks shelled out by you for an expensive AC repair that you can do yourself for free with jut $20 for an ac fan capacitor and an AC compressor run capacitor. The entire testing and AC repair for this failure when your ac compressor wont turn on is only about 1/2 hour total.
a/c compressor not working
If your ac compressor wont turn on or you hear it humming but the ac compressor fan is not coming on the ac run capacitor might just be all you need. Once you get your new run capacitor installed, you'll be surprised how easy it is to solve your AC compressor fan not turning on.
Tools and parts used in this Ac repair video for changing your AC run capacitor:
✅ Klein Tools MM400 Digital Auto-Ranging Multimeter amzn.to/30snn8A
✅ Klein Tools IR5 Dual Laser 12:1 Infrared Thermometer amzn.to/2O94oNS
✅ GreatNeck Nut Driver Set, 7-Piece: amzn.to/2VGjaMI
✅ Titan Pro TOCF10 10 MFD 370V OVAL Capacitor amzn.to/2OaPdUy
✅ Titan Pro TOCFD353 Run Capacitor 35 MFD 370V OVAL Capacitor amzn.to/2LZnPWO
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✅ Klein Tools MM400 Digital Auto-Ranging Multimeter amzn.to/30snn8A
✅ Klein Tools IR5 Dual Laser 12:1 Infrared Thermometer amzn.to/2O94oNS
✅ GreatNeck Nut Driver Set, 7-Piece: amzn.to/2VGjaMI
✅ Titan Pro TOCF10 10 MFD 370V OVAL Capacitor amzn.to/2OaPdUy
✅ Titan Pro TOCFD353 Run Capacitor 35 MFD 370V OVAL Capacitor amzn.to/2LZnPWO
VERY GOOD, THANK YOU! MAY YH BLESS U. NOTE: YOUR 2SEREWS FLEW AWAY!
Such an easy fix! Thanks so much Jeff for sharing this video. Got the part in less than 24hrs and you saved us from paying a premium and a Vegas heatwave.
I have the same exact problem. You gave me enough confidence to want to do it myself. I’ll keep you posted. Thanks
Thank you Jeffostroff. This video gave me the confidence to dive into my non-cooling air conditioner. Had a dual start capacitor, but learned enough here to give it a shot.
Thanks, I'm glad you liked it! Charlie
Thank you! Half an hour to Ace Hardware and back I had my A/C up and running again. You saved me tons of $$$!!
Amen! Thank you for your time and clear explanation. Using your advice I was able to get mine back up and running.
Awesome, glad to help!
Simple and easy to understand! Thanks so much!
Glad you liked it!
Just got to say THANK YOU!! Yesterday evening downstairs AC went out. Call home warranty company they can't get here until Tuesday and I had to sleep upstairs. :-( Searched RUclips found your video and Every HVAC parts store was closed except one this morning that was closing soon. Got the capacitor, installed it following your guide and I have AC again!! As easy as you said. Thank you for a great video! Yes I did subscribe!
Your video helped me fix my problem Sir. Thank you so much.
I like the video. Funny, I have the exact same AC unit and multimeter, its like you made the video specifically for me. I'm going to check my capacitor right now to confirm that it is bad. I appreciate the help!
Glad it helped I bet you don't have the same rusty capacitor! LOL!
Great video and thanks for the detailed explanation. I will use this knowledge to try to fix my unit.
Glad it was helpful!
Thank you so much Jeff. I had the exact same symptoms and ordered a new capacitor from Amazon, replaced it and it fixed the problem, AC working well!
Awesome, glad to hear you got it back up and running!
Jeff, gotta say thanks for this video.
Your vid had two caps, start and run, and other videos only focus on the run cap. If your motors not starting, most lily the start cap, but some may have a single start run cap.
This got me up and going in the heat and some more time on my ac unit without the added cost!!!!
Thanks again!
Thank you for the video! I fixed my AC and it cost me $21, It's mother's day weekend and I'm sure it wouldn't be cheap to get and AC guy out here. Your video saved me money!
Glad it helped Sean!
We just used your video to help us repair our AC and when I say you're a lifesaver it's an understatement! From the bottom of my heart, THANK YOU 💛
Thanks so much for posting this!! It worked and saved me hundreds $$!!
Glad it helped! Thanks for watching Marc!
thank you for sharing your knowledge. I replaced both my capacitors for roughly $25, whereas the HVAC company quoted me $260 for the service call and the repair plus parts.
Glad it helped, yes the AC repair people charge an arm and a leg for a dirt cheap component
Thank you, very helpful
Absolutely wonderful thank you so much man save me some products and very easy to understand
Happy to help james
Bro - You just saved me a lot of money. $100 just to come out to check the system and assess the issue. Minimum charge $200. Cost me $19 and 10 mins of my time. Could have been cheaper but chose a capacitor with the best recommendations 👍
Thanks, I'm glad you liked it!
thank you so much! Service guy tried to tell me need a new system @6500. this part cost me $11. Amen 🙏. Made me look large in the wife's eyes. when I save that kinda money it pays extra frisky dividends for Papi Papi. lol
Glad I could help
Thank you!!! Simple and clear!
Great video. My AC quit today with exact symptoms shown. I removed the dual run capacitor (old Carrier from 2000) and it was buldging. Bought one at an electronics store for $11 and my AC is purring right along. I had an hvac repairman fix it 5 years ago and it was over $150. Lesson learned.
Thanks Jeff for all these great tips! You're the best man!
Glad you like them!
Please make sure you don't touch the run capacitors before discharging it with an insulated screwdriver. Don't want anyone to get hurt. Also you may have one 'dual run capacitor' which includes capacitors for both compressor and fan in one. Lastly, advise not to put screws loose on top of the unit. You will lose them as hey were about to fall in through the screen once the A/C fired up.
I really like the way you explain this process. My outside unit is humming trying to kick in but the fan is not running. I tried to spin it with a screwdriver. Nothing
I’m going to try replacing the capacitor. Wish me luck. A man charged me $450 back in 2009 when I became a new homeowner. What a ripped off it was!!! Knowledge is powerful. Thanks a lot
Did changing the capacitor fix the problem?
@@mccartneystuart It didn’t. I called an A/C man who recently replaced my dad’s unit. He told me it was the fan motor. The wires that ran inside the motor burnt out. I bought one online for $75 and replaced it myself. It was very easy.
@@tdatilma good to know and I appreciate the reply as I'm in the same situation although I spun the fan on mine with a screwdriver and it kicked the fan on so hopefully it's just the capacitor. Picked one up for $31 today and will put it in when I get home from work. Went to 4 HVAC supply stores and all were out of the one I needed and the 5th store had one. Not sure why they're difficult to find unless the supply chain shortage has hit the HVAC industry too. Thanks again.
Love it...our capacitor is a dual type and it is the original one that came with the unit in 1991. So is the condenser motor ! We have a new USA made motor and capacitor in reserve just in case.
Thanks! This is exactly what I had and was able to easily fix it.
Glad it helped Valery!
Nice work, thanks for sharing. Time to troubleshoot
Glad to help
Awesome. Thank you for sharing🙂
My pleasure 😊
Good on you for fixing your own condensing unit! I've had to do the same thing a couple of times, once at 4 am! I always keep spare caps and a spare contactor on hand for just such an occasion. BTW, that round unit is a dual run cap and is supposed to work with both the compressor and the fan motor - 35+5 means 35mfd for the compressor and 5mfd for the fan motor. The terminals are likely labeled common, fan, and herm (for the compressor). You really shouldn't need that 10 mfd cap.
Yes you are partially correct. I believe the reason we need this 10 UF cap is because a newer blower fan motor was installed a few years ago, and the sticker on that newer fan shows the circuit diagram including the 10 UF cap, so I assume 35 UF would be too much for that particular motor. It is likely that the original fan motor supplied by Rheem was originally fed by that larger dual run cap. That would also explain why there is no parking spot in there for the 10 UF cap, because the original cap was wired to both the compressor and the fan.
@@jeffostroff If you went to the supply store, you should of got the right capacitor for the unit. There is only one hole because you only need one capacitor. You should of got a 35/10. No need to have 2 in there if you get the right one.
@@DC-uu4yq Is what you're saying true despite the OP's comment regarding the fan previously being changed out and having different ratings?
@@5jjt Like I said he went to parts store and he should of got the right one, a 35/10. This is a duel capacitor and will run the fan and compressor. No need to have 2 different capacitors to do the job that one could do.
@@DC-uu4yq theres a cable that runs from the motor run and the dual where would that cable go if it doesnt need the second one?
Excellent video with lots very valuable and helpful information that's easy to comprehend.
Thanks so much! I just had this happen to our unit which has a dual cap. Top was bulging and was the culprit. Noticed chewed up wires too (mice). Cut out the bad stuff, redid all connections with new wire nuts, and installed a new cap for twenty-two bucks!
You're welcome!
Great video Jeff... I appreciate your videos; they are very helpful.
Almost bet this is my problem! Thanks Jeff!
have you been able to confirm and fix it:?
Thanks for a very informative video.
Glad it was helpful!
Didn’t know that it was this simple, going to make an attempt in a few
Agree with others on only needing the one cap. Also, can't believe you didn't have some steel strap and a couple of sheet metal screws to fasten them down to the frame.
That was the old AC and how it was setup. We got rid of it soon after
Either way works. Some techs believe two caps tend to work or be more robust than the single. Also, with the single cap, the brown with white stripe is not used and capped off.
You saved me a bunch of money today. Thank you!
Glad I could help! Colin!
Awesome video. Thank you
You are welcome Peter
My AC compressor stopped working after following this video bought the same multimeter and found that my capacitor was bad. Ordered a new one and installed it. Works great, amazing how easy it was to do. Thanks for posting this video, very helpful.
Glad it helped
Yes and no doubt saved a service call, install cap fee and the part being highly over priced. Likely $300 saved but HVAC techs have a fuel drinking truck, insurance, maintenance, stocked with HVAC parts and equipment to pay for.
Thanks Jeff!!!
Thank You! I am recently widowed, and tomorrow will attempt to do this repair. I appreciate all the great info!
You can do it! Let me know if it works out for you Patti!
How'd it go?
@@jeffostroff I went out to my AC unit, removed the fuses from the disconnect box. My neighbor had offered to help (he is not an electrician & I could see he was not comfortable at assisting in my project). I removed the screws from the cover with my 5/16 socket. The next step the video said to do was: to insure the run capacitor is discharged, place a screw driver with with an insulated handle along both sets of terminals. That’s when everything came to a halt. We could hear the buzzing, which he said meant there was still electricity running to it. I took a photo of the capacitor I needed to order & I put everything back together again. I searched for the answer to my question - if the fuse box is off, what is powering the buzzing sound. That was not addressed in any of the videos I watched. I searched & searched the web and finally came across a blog that said the fan needed to be turned off, because it was sending message to capacitor to turn on, so power was still going to it plus not good for AC motor because it could cause more damage. I went to thermostat which I am still learning to work & could not find how to shut it off! It just went from auto to manual. I came back to internet & searched again and learned that there should be a switch - like a light switch by the inside unit. I looked and looked by the furnace area (I just learned which was the furnace shortly after my husband was killed a year and a half ago) just as I was going to give up I found it! I switched it off, and sure enough the thermostat shut off completely and the outdoor unit’s buzzing had stopped! I was so excited - I felt a sense of accomplishment Lol! My part arrived last night $16.79 (Amazon Prime) as opposed to $60.00 for exact same part at HVAC store! So today, I hope to do this. I don’t think I’ll ask my neighbor for a hand, I’m sure I can do this. Though he probably saved me from getting electrocuted since I was going to continue even with the buzzing sound. My brother made me a little nervous but I’m praying all will go well.
Thanks again!
Thanks for this informative and clear video. Relied on it to replace worn out capacitor and fix our own A/C. Very helpful!
Glad to here it worked Chris!
Great content. One comment/clarification though. The start cap doesn’t provide a jolt to get the motor running. More precisely, its purpose is to create a phase difference between the start and run windings within the motor. It’s this phase difference that creates the torque necessary to get the rotor spinning. Without it, both the start and run windings would be in phase with each other, and the torque necessary to start the motor couldn’t be produced.
Just replace my motor, still having humming, I'll try capacitor and relay tomorrow, good info.
Let us know if it worked
Nice video. I think you should show how to "de-energize" the caps to be safe.
Great suggestion! Of course by time you measure 0 uF they are already lacking any energy.
jeffostroff how about you leave it to the professionals and stop showing people how to kill them self. Just because you turn the disconnect off doesn’t mean power isn’t still flowing through the unit. People like
You is what kill people.
@colleenallmyfriends I Agree 1000 percent. You still have to have common sense to tackle any job. I simply handled the capacitor as if it were a live wire. avoiding contact with the old unit. Maybe that was too much caution, but it worked for me.
Viewed this vid, saved a service call and $100's, thanks. Couldn't find a mailing address to send a thank you check.
Great video! Good job!
Thanks for the visit Rick
Awesome video. Thank you sir. In my case the fan starts, runs for a couple mins and than stops. Your thoughts? One thumbs up from this guy
There's so many things that can cause that, starting with the fan itself, or maybe the cap getting ready to go. this web site here has a listing of 15 possible things to try: inspectapedia.com/aircond/Air_Conditioner_Short_Cycling.php
Thanks for the quick reply and the link. Cheers
Awesome video! Now you’ll just need to find those missing screws.
We already bought a new $10,000 Dave Lennox Signature Collection X25 Series AC last month. The grass can keep the screws. Will be uploading a video on this hopefully in a week or so
Hahaha I was watching those screws rattle their way off next to the compressor. That stressed me out for some reason.
@@alextownley9556 same....i was waiting to hear the fan spit them out.
Thank you, good video.
Glad you liked it!
@@jeffostroff Nice Air Conditioning Repair Videos.
Really helpful
Glad you think so Mike!
This was very helpful, jeffostroff. Thanks! My ac fan unit just stopped blowing last night. After watching this, I think I'll give it a shot at trying to repair it myself. Hopefully, it's only the capacitors. I just have a basic multi-meter that doesn't appear to have a separate capacitor gauge. However, I'm thinking maybe I may be able to get by just measuring ohms. Do you think that'll suffice?
No, for capacitance you have to measure capacitance. Buy a cheap meter at Home Depot
Great,ok, will do, Jeff. Thanks again!
Thank you so much for this video. I had no prior experience working with well anything having to do with my AC unit. I followed your instructions and my AC unit is working.
I was quoted 2K dollars to fix my AC unit. I was able to get it back running for $30.
Great to hear Christina!
Friking thieves to charge that much
Your video is so helpful
Glad you think so!
I have this problem here my fan wont turn on thanks for the video stay safe out there.
I hope this video helps you!
So I replaced the capacitor and the fan is now working but I still cant get the house below 87, i hear the compressor humming but it seems the fan cuts on and off quickly (maybe 5 mon run time) not sure the next step to take.
Great Video!
glad to help john!
Thank you so much.with resen money expenses you save us
Nice!!!
Nice !
Thanks a lot 😁
You're welcome 😊
Thanks!
Thanks for the donation Eric! Glad you liked the video
Thank you very much for your video it was very helpful and easy to follow, my ac was doing the same thing ! I did remplace the capacitor and seems like my ac it’s doing the same thing! Any advice would be greatly appreciated, thank you.
Your fan is still not turning on? Does your unit have one capacitor or 2 capacitors? If there is only one cap, then it is a dual capacitor, one for the fan, one for the compressor. You need to confirm you wired it back up to the exact same way your photo of your wires shows. If it's a dual cap, on wire from the compressor goes to the C and another wire from compressor goes to the herm terminal. The fan wire is marked fan.
jeffostroff z
@@jeffostroff thank you for your replying back to me , its working now ! its only 1 cap, i did put back the wires the sama way ass the pics i took before disconnect everything, and still not running but i ask one of my friends that work in that field ! and he was able to come over and check the unit for me and the fan was the issue! we change it and VIOLA! work like new! thanks again i really appreciated your help. thanks
@@golddiggerxxxxx Figures the 2nd most expensive component is the one that fails well at least you have it fixed awesome news
@@jessicagreen318 z?
thanks jeffostroff! I am looking at overhauling my AC and it looks just like the one you have pictured. Thanks for your parts list pinned below. I also want to change out the "contactor". i opened mine up and its identical, but unfortunetly the part number has worn away. It "looks" like 9517 honeywell di242r but i could be mistaken. i cant find any part that matches this number. Can i use an atlernative, if so, what? thanks again!!
subscribed thank you
big help!
Glad it was helpful Jim!
Youre the man!
Thanks for this! We have a large bush in our backyard and the dead leaves got wrapped around the fan motor. I’m guessing it burnt up the capacitor.
Yes, that was it. Thank you!
Awesome!!!
Thank you! Cheers!
Thank you so much boss💪
Did the fix work for you?
@@jeffostroff yes sir I appreciate you 🙏
This was very helpful. We were able to fix the capacitor worked for about 15 minutes then it stopped working again. Any suggestions?
Check the capacitance with a meter if you have one, see if it still has the capacitance, maybe it blew. Maybe you need a hard start capacitor. Is the compressor still humming, but not turning on?
Hi, your video is very informative. For my unit, it turns on ok with cold air blowing out and the fan is running. But the fan stop turning after few seconds. What could be the problem. Mind is a Keeprite SSC-31-ID built in 1980's. Thank you
Well I would definitely check the values of the capacitors, and if you have any in line thermal fuse check that as well. But it just sounds to me like the motor for the fan is going luckily you can get the fan yourself for about $100 or so I'm not surprised this have really shot up recently I just haven't looked after COVID
One thing you missed in suggesting: Buy a spare set of capacitors ahead of time and store them in the air handler room. Cause the A/C will always fail Friday after 5pm and you won't get a tech till Monday. Also A Harbor Freight cheapo meter will no do. But with the saving in capacitor costs you can buy a meter that will do the job.
Yes, funny you mention this because when I bought my last capacitor a year ago I kept thinking I should buy 2 or 3 because they are cheap when you buy them from the supply house, but $150 when the AC company installs them.
Great video, I believe this is the problem to my AC. Don’t you need a HVAC license to buy AC parts and components? If not where can I go and buy these items in Katy, TX?
This video might be a little older but it’s priceless. Excellent troubleshooting explanation. Idk if anyone still monitors this but I was curious about a high efficiency 17-19 seer Luxair unit. Under 75 degrees ambient temp condenser
Fan motor blows after the compressor is done running. Multiple speed fan in condenser 3-5 ton. I thought the fan was supposed to run every single time the compressor ran. Maybe this is something new? Thanks to anyone that can help.
YEs I too thought the fan motor should stop when the compressor is off, unless it is remaining on to cool off the compressor
Some A/C units have a low ambient temp control in it that controls the condenser motor. It may not come on with the compressor if the pressures are low on the discharge side. It will come on as the pressure increases.
@@gibraltar321 Thank you. That makes sense. I notice there is no connection for the fan from the capacitor, it's off the main board of the condensor. However the compressor gets very loud sometimes after it's been running and the fan hasn't kicked on yet. It seems like it is out of range but IDK if that's an option for my unit. I'm still trying to find info on my Luxaire system to see how it all works.
@@jeffostroff MIne is weird. Sometimes the fan starts before compressor start up, sometimes together and sometimes a few minutes after compressor start up. All different ambient temps, nothing is consistent. I almost positive I have a clogged filter drier and that's screwing things up.
Good video
Thanks for the visit
You saved us like $350 with this video!
Thanks, I'm glad you liked the video!
Hey Jeff. Quick question: When you are testing a heat pump and turning it on an off, are you just leaving the furnace in a state of "call for heat" and then using the heat pump's 'fuse block' to start and stop the unit, or are you turning the furnace on and off each time? OR.... are you 'jumpering' some contacts on the heat pump to fire it up for testing?
I always wondered what goes on with this. I am in a situation right now where I need to figure this out so that I can bypass the comp, then the fan and even check out if the contactor is acting up due to some noises I'm hearing. It seems a little silly to run in and out of the house each time. My plan was to pull the fuses, call for heat and then plug the fuses in for testing and pull them back out between tests all while the furnace is running. Does this make sense?
Really great video. I have some questions. How long should these capacitors last, even if not in that much use? Also, with the ac off, should you be able to spin that propeller fairly easily, or does the motor pretty much keep it from spinning? The house I'm in has an AC that hasn't been used in about 8 years, so there is no telling what the problem is. Thanks.
The fan should spin ok. We don't know how long capacitors last it is different for everyone. These got replaced 3 times in 10 years.
@@jeffostroff - Thanks for the quick reply. Yea, even if the capacitors are bad, which I think is true, I was afraid those blades weren't right. I will have to remove anyhow to see if there is debris stuck underneath, but I will probably have to order a new motor. Could it sitting for so long without use cause it to be somehow sticky, and if so, could oil or WD40 loosen it up? Sorry for all the questions.
Can you tell me which wire goes to which in new capacitor? I got brown, blue, and yellow wire. (Old capacitor the words on top I am unable to see any)
I have no way of knowing, and each company is different with the colors. You should take a photo of the old before you unwire it, or draw out a diagram of where the wires are going before you start.
God bless you
Thanks so much Josh!
@jeffostroff Nice video, and thanks for sharing. I just want to point out that your run capacitor had 3 connectors because it was a 35/5 MFD dual run capacitor. This means there was one common connector, with the other two being for the fan and compressor (or Herm) respectively. When you were replacing the capacitor, you didn't need to buy a separate 10 MFD capacitor for the fan. In the past, someone had installed a separate fan capacitor because the main run capacitor's fan side had failed. You measured it as 3.3 MFD, whereas it should have been 5 MFD. The other technician only added a separate capacitor for the fan side but incorrectly used a 10 MFD instead of the required 5 MFD. This was only a makeshift arrangement. However, with your new 35/5 MFD dual-run capacitor, you didn't need to use a separate capacitor for the fan. You could simply connect one wire to the common terminal and the other wire to the fan terminal. You could save $6 while using the original values would likely have made your unit function better.
Good to know thanks! We also replaced this AC with a top of the line Dave Lennox Series, a much better and awesome AC!
I was able to get the fan to start spinning with a long plastic stick after repeated attempts.
I noticed the fan surface in the center of the shield was very warm though, which suggests to me, the problem is the fan motor?
Your thoughts?
Symptom was a buzzing every few minutes, but no spinning fan. I got it to spin with the plastic stick, but I don't think it got up to normal speed. We have 2 compressors and the other smaller ones fan seems to have higher rpm for sure.
And it's still buzzing periodically, but the fan is spinning.
If you had to push the fan to get it going, then your fan motor appears to be ready to go. I would start looking for the part locally and checking the prices to see who has it for the lowest price, and be ready to pounce. these things like to fail at 5:59 PM, before you can get to the parts warehouse at 6 PM closing, then you have a nice long hot night ahead of you.
My fan is doing the same thing ever figure out what it was
how much do contract usually takes to replace a capacitor. Simple job but how much do they usually charge? $150? in year 2022?
Thanks for the video. I replaced all three of those but the fan will only come on for a second. Any suggestions?
Hey 👋 so mine was doing the exact same thing. But why when I turned the unit off for about an hour..its up and working? Do you know why it did that? Thanks for your help! I hope you see this :)
Your compressor may be nearing end of life. You might consider a hard start kit, like we installed on ours in August to tie us over the last week before replacing our AC, we just had to wait for the new AC to be delivered, but compressor would not crank over, just needed to extra ummmmph! Our video shows 2 methods, the hard start kit is the second method. ruclips.net/video/3LG0t2lV0Gg/видео.html sometimes you can get over a year or more out of your AC with a hard start kit
Hello there,
I just subscribed.
My hvac is doing the samething and i think your video will solve the issue.
Question. Are capacitors standard size or unit for any hvac?
No each compressor has it's own size, typical sizes are 10 uF, 20uf, 35 uF
@@jeffostroff you know i checked the capacitor and its newly replaced (april 2021). The hvac fan is on and off. Sometimes it would make a humming noise. Not sure if thats something we should be concerned about. Btw, the hvac is from 1994 year old.
Unfortunately, our hvac made a strange noise and i think the water leaked and gave a bad smoke in the backyard. Not sure what to do.
I am having that very issue!
Hopefully this solves it for you
Depending on where you live, you may not be able to buy them from the local AC supply house. Where I’m at in Texas, they only sell to licensed contractors. Therefore, I get mine in advance from Amazon along with the contactor...
Gary, that is why I put th e links to amazon pinned in the comments above at the top, so people can go order them there too.
Any concerns with getting fake Chinese capacitors from Amazon? Just curious since I'm not so trusting when it comes to buying electrical components from Amazon.
I don't think it's been mentioned in the video, so I'll mention it here. Be very careful around capacitors, especially large ones like in the video. They can kill you if they still hold a charge, which is also very likely if you just ran the AC unit and decided to open it. Make sure to measure the capacitor with a multimeter and discharge it before handling it. Although a bad capacitor will most likely not hold a lot of charge, if you're wrong about your diagnosis and the capacitor is good and something else is wrong with the unit, a charged capacitor, especially one rated for 370/420V can really hurt you.
Very good point. You said ‘discharge it’ , How do you discharge it? Just wait till measurements go zero? Thanks!
@@genenegeda509 There are a few different ways to do it, professionally you would use a capacitor discharge tool, which will discharge the capacitor and give you an indication when it's safe, but for people at home, bridging the positive and negative terminals of the capacitor together for 5-10 seconds with something like a screw driver with an insulated handle or a high wattage medium value resistor should do the job.
Yeah from what I understand its a pretty bad idea he's touching the capacitors? But obviously he must know so what am I missing? He initially said he thought the stronger capacitor was good.
Glad to find your comment here. This was going to be my only critique of an otherwise helpful video given how nonchalant Jeff is in handling the capacitors, especially touching the terminals. That goes for the old ones AND the new ones. The new ones could hold a charge from factory testing or even from someone returning the unit. BE CAREFUL OUT THERE!
No one mentioned the screw almost going in the fan at the end. Control your hardware also
Question. I replaced the dual run cap only 6 months ago. It checks good. wire connection check good. The condenser fan will not kick on every once in a while. It's happened twice about 3 weeks apart. I know it's going to happen again, just don't know when. I'm thinking a winding in the fan motor may be bad and every so often the fan comes to rest on that winding which is the phase winding for the cap. Thoughts?
Check the contactor also, as bugs and leaves and dirt get in there and block the contacts, otherwise likely the fan is on its way out
How do I discharge the capacitor before I start tiuching with my hands? Thank you.
If you don't measure any voltage across it then you likely don't need to discharge it. But if you do discharge it, use a thick resistor that can handle a few watts. Many people just short the terminals with a screwdriver but I think thta poses a risk of explosion to the capacitor.
Is it a good idea to replace the capacitor on my 7 year old a/c before it fails?
I'm a fan of not touching it until it breaks. You can buy a spare and keep it on hand, they are only about $15.
Excellent video - I have a similar problem and I see the large capacitor (for compressor fan) but can't find the small one for the blower squirl cage? I think it has some kind of cover on the motor. maybe underneath? I think the unit is a Fridgidaire heat pump. Q7RE Series - Most of the time I have to jump through hoops for 15 mins before the squirl cage will finally start (with several false starts). Then I just leave the fan set to ON . The compressor seems to go on & off ok !! I did notice our elec bill last month was like double 😞. Guess I'll try tonight when it's a bit cooler outside (Florida). Damn 5lb mosquitoes will probably find me lol
Is it possible that the large capacitor runs both fans? It's labled C65R (45+7.5)uF+/-5% 370VAC 10000AFC? Sign of the motor cover says Warning - don't take the cover off !! I've been daring before but just thought I'd check. Thanks in advance for any feedback 😊
On mine, the large cap has 2 caps built into it, and it runs both the compressor and the fan
@@ProjectDreamCatcher Yes, his setup is not normal. A single capacitor will have two different capacitance values. He should have a single 35uF / 10uF capacitor. My guess is a repair was made and the HVAC tech didn't have the right capacitor in his truck, but had a separate one that would work for the fan. Therefore he has a weird setup where he has a 35 / 5 capacitor where he doesn't use the 5uF capacitor for his fan (note he doesn't connect anything to one of the connectors on the large capacitor), and then uses a 10uF capacitor for the fan. So you likely have the proper setup with a single capacitor for both.
The capacitor is there to store up and then provide a jolt of electricity to power the start-up of the fan motor and the compressor. If it sometimes doesn't work, or never works, it sounds like it is probably the capacitor.
Look at the two capacitance values on the capacitor and find a single capacitor that matches the two capacitance values and the voltage. Then take a picture of the 4 wires going into the top of the old capacitor (there should be connectors for fan, herm, and C (for common). Should have one wire to fan, one to herm, and two to C. Hook up the new capacitor the same way and it should be good. Turn off the power to the HVAC unit and turn off the system on your thermostat to be safe. Discharge any power in the capacitor by using a screwdriver with an insulated handle to bridge the connectors on the top of the capacitor.
FYI, your fan setting is for the air vent fans, not the cooling fan on the outdoor unit. Setting it to always on will not always run the outdoor fan.
This old pensioner loves you, Jeff!
Last week my ac unit was working fine then my contactor messed up and burned my transformer I change both of them but now my ac won't blow cool air, the outside fan turns without a problem but I notice that instead of blowing warm air it's blowing cold air and also notice that one of the copper tubing is VERY HOT any ideas of what it could be? THANKS
One copper tube is supposed to be hot, the other one should be cold. It sounds like maybe your fan is kicking on, but your compressor might not be since you get no cold inside the house. So check the compressor's capacitor, it is the larger of the 2 caps, or in case of a dual capacitor, you follow which wires go to the compressor, and that side of the cap is where you measure with a digital meter, the capacitance to make sure it is in the range like 40 uF, whatever the capacitor says it should be on the label. If you measure zero or less than 10 uF, then likely the cap is bad and needs to be replaced. If the cap measures correct uF, then it is likely the relay contacts where the power enters into the AC unit outside. Usually you have a dual pole contactor there, and one leg of power wires goes to the fan, the other leg goes to the compressor's cap to power on the compressor, very easy to. Check and make sure your contactor is clean by gently brushing out any dead insects and leaves which commonly clog inside the contacts and prevent them from closing. This solves most people's problems. If the contactor looks corroded or is old rusty and flaking, then that is your problem, because it cannot route power to the compressor and fan. Now we have seen cases where compressor gets power, but fan does not, because maybe one side rots away but the other side is good. Let me know what you find out.
Thank you Jeff, I replaced the fan as recommended by the $175 service call. I also replaced the capacitor. Fan still doesn’t spin. Compressor hums but no fan. I spin the fan but it does not work
What next?
Unplug the capacitor, and make sure it is the correct capacitance. Make sure you corrected the correct wires to the correct terminals on the cap. Usually they have a sticker somewhere on the compressor with a wiring diagram so you can confirm that the correct wires for the fan are going to this cap. You might also try adding a hard start capacitor, we have a video on that too..
#Salute that has worked for me in the past. Unfortunately for me my one of my 18 year old units may not be able to be fixed. I tried a spare capacitor from Grainger I had. Then I got a Titan brand one from Ace Hardware today and the unit turned on and spun like new for a few mins then the fan just slowed down and spun slowly with a loud hum. I have ordered a new one from Amazon coming tomorrow morning, hopefully it works. 3 capacitors in 2 days isn't good. Maybe they were bad like some parts are. I'm going to harbor freight to get a new multi meter to test them like you did tonight to see if I can get some information.
Our capacitor is always fine its the relay we have issues with the last three years. I think we made it past last year but the year prior the ants burned it out twice within two months. Obviously wé're working on the ants but if anyone else is having issues "fire ants" are getting immune to andro and can simply move around it. So Im trying to do this by myself and no one has used anything other tool than a screwdriver to discharge the electricity and my husband did it that way last time. So I havent touched it yet. If you can reply to let know how Im sure my heart will thank you saving me any shock or other damage since likely I'd be the one to blow up the capacitor. Thank you much!
I had leaves and corrosion on mine.
Mine was two seasons of hornet nets. Little buggars. They also made it difficult to keep the cottonwood hosed off. Finally took care of the hornets, now for replacing the capacitor.