AC Fan Outside Not Working - How To Check It
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- Опубликовано: 7 сен 2024
- Is your AC fan not working or spinning? It's possible that it is simply not getting power or that the capacitor is dead but the condenser fan motor itself is good. In this video I show you how you can check your AC fan motor to see if it is good or bad.
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Thank you for the informative video, I tested the fan and my fan was good, come to find out I had a bad capacitor. Thank you once again👍
I have a question for you why is my Central air A/C keeps turning on and off every few secs on ones having that problems only me thankyou
You are the best. A/c stopped working in the middle of the summer. Had a estimate to fix it $700.00. Luckily found your RUclips. Bought a capacitor for 8 bucks and now I’m chillin again. Thanks.
I'm the HVAC technician and I can say this buddy is good enough in teaching. I always like to check your vedios. Big up.
Yeeaaa ima go ahead and call major BS here
You know what's wonderful about people is when they share their knowledge. I appreciate you for sharing your knowledge with us. We fixed our AC! YAY!
You just saved me about $500. The ohms were good but the motor is 17 years old and I'm told it has seized up. Capacitor was just replaced. Amazon and RUclips to the rescue!
How did you deduce that the fan motor had seized up? Does it not spin freely by hand? I'm curious because I think I'm in the same situation you are. After 18 years, my condenser fan stopped working. All these guides say to check the ohms, and if the readings are correct, then the fan is fine. My ohms were perfect. the fan spins freely. I took the fan motor apart to check for damage/corrosion, and it looks almost new. However, it will not come on. The compressor comes on, then shuts down due to the fan not spinning. I have all correct voltage at all connections. New capacitor. So, it has to be a bad motor, right??? lol! I appreciate these videos, and I know the content creators try to keep their tutorials as basic as possible - but I haven't heard "If the fan's ohm readings are correct, then the fan is most likely good. However, it is possible that other issues with the motor could prevent it from working." I'm just going to order a new motor, and return it if it doesn't work. I'd really like to hear how your repair goes! Good luck!
@@KittyNoNo our AC guy mentioned that the fan motor may become noisy i.e like a bad bearing. I didn't notice anything specifically, since we have 2 units outside and can't really hear them inside. I figured there aren't many other things that could be bad, and the capacitor was replaced the day before. I didn't take the motor apart to look for corrosion, but it seemed like a reasonable cause of failure. I didn't want to pay his fee to come back out and check it/replace the motor (which worked when he left the day before), so I found this video.
Mild panic, the new motor came in, and it had 2 additional wires connected in a loop, which changed the black wire to blue. In between looked like a lighting ballast. White ceramic. No where to put it, and definitely would get in the way of the fan. We zip tied it to the grate. Hope it works out! We plugged everything in, confirmed voltage. The compressor started but not the fan. We pushed the blade with a stick a little and it took off. We have cold air! We hope the repairs hold up. Thanks again!
@@robertfulton4829 Thank you very much for taking the time to reply. I see that you've installed the new motor, and that it solved your problem. Good to hear! Hopefully, push -starting the fan was a one-time thing and it will start automatically going forward LOL
I''m looking forward to cold air too! Thanks again!
@@KittyNoNo Well now we have a new issue. Cool air, but the temps arent dropping. I will have to investigate more today.
You are too good! Can't thank you enough for putting this info out there. Our fan quit working a while back. Your videos pointed me through the troubleshooting effort: capacitor tested ok and was not physically deformed. Then found quite a few dead ants in the contactor. Cleaned it out and the fan turned on as it should. Fast forward a few weeks and the fan has quit again. Will be testing it as you have shown here. Very much appreciated!
No offense, but for a young guy, you really have your stuff together. I really appreciate how you put emphasis on safety precautions. I took my grandson to a trade school open house, and as we walked out of the electrician display of graduates, there was a separate display of one particular individual. I asked what was the reason for his distinction. We were told that on the second week of his first job he had electrocuted
himself by not following one of the basic rules that were taught at the class. You never know if your emphasis on safety and what is routine practice for you, could reach the right ears and save a life.
@Blank Man No offense that I first assumed because of his age he wouldn't be as cautious and safe as he is. An assumption that I apologize for having is what I meant.
@Blank Man The young man who electrocuted himself was relatively young and in his 30's, probably like you. Maybe subconsciously that was
In the back of my mind. Who knows.
Our A/C unit has making buzzing sound all the sudden I replaced entire A/C system and unit 2years ago.
It was about $6000.😢 I am so upset because #1 insist so freaking hot and #2 only 2years?? I am having issues with brand new A/c unit 🤬I called the company 3times they don't even call me back.
Thanks for SAFETY FIRST cautions, so very important in everything we do, especially when we are around electricity !! A big thank you for the detailed video on how to check the fan motor Ohms resistance. At first I changed out the Start Capacitor and motor started, but would not keep running. Then I followed your instructions for checking the motor and decided it should be replaced because of the Ohms resistance measurements and what I felt were bad bearings (way to much end play). New motor in and running great.
Really appreciate all your videos. Very consice.
My mother's unit was frooze up, so I helped her get it running again. But the tech she had apparently called came over. He simply added more refrigerate and left. Only to wake-up to a frozen unit again. Now the blower motor is not even kicking on. Hopefully it does not need replaced.
God Bless & God Speed Brother.👍🏻
Jay, thanks to your videos I was able to diagnose my ac problems and fix them myself. Much appreciated.
I subbed to your channel last year when I became a homeowner, this video fixed my A/C this morning after it broke down last night and I was still able to go to work. My capacitor wasn't shorting to ground, but it was almost too hot to touch when I removed it. I was able to push start the fan last night and set the temp down to 65 so it would run all night and we got some sleep before the repair.
Thanks for your video, my capacitor was bulging on top so I replaced it and now my air conditioner is working. Thanks again.
That's what we like to hear! Thank you for commenting!
Great advice. Thanks very much. You're an awesome teacher.
Thanks for this video. I just had to replace both motors inside and out on my unit. I'm no electrician but I want to tinker with the old motors to learn a thing or two. Before I open the casing and dissect them like a frog, I'm going to take the opportunity to learn how to test them.
This video very helpful I just following his diagnosis step and tracking by multimeter A/C out box one of fuse was gone so replaced new one and A/C working great. Save lot of money and times. Thanks again an appreciated this video.!!! ;)
Such a precise and easy to understand explanation. Thank you bro.
Brilliant information- resistance reading
Hey Jay I would like to say thank you for your video. The knowledge that I get from you is the bomb. The simple repairs I can do myself just because of you. Keep putting the videos out and may you be blessed
Thank you. I love those AC units you have there in the US. I wish we had them here in the UK
Thanks! Through your videos I have been able to isolate the fan non operation as the issue. Next up for me is to use what I learned here to check the resistance with my meter to verify that it is the fan motor that is in fact bad before spending perhaps hundreds on a new motor. The only other thing that I am unable to check is the r-22 pressure as I do not have the proper gauges for that.
I like how simply explain the things! thank you
I try to keep it non-technical ;) Thanks for watching and commenting!
Thank you for your time and explaining the process. Your are a great teacher.
U refreshed my HVAC memory. My condensor fan not running. I replaced both capacitors. Still not running, but I hear humming sound.
Its crazy how much more im learning doing both install and service, I get to learn both sides and I have a better understanding of the whole system. Your vides have helped me out a lot, keep it up!
Thank you! Glad to hear the videos are helpful. Good luck in your career!
Good work young man thanks for the info keep up these helpful videos they are a treasure to people on a budget and cant afford a service call.
Thanks
Very clear step by step directions. Thanks for the help!
Hi, Sir, you are a great mentor. I have some questions: If the fan motor stops running but the compressor is still running, what will happen? In this situation, why is the circuit breaker tripped? and how does the compressor's thermal protection mechanism protect the compressor? Thank you.
It's great that you get right to the point with all of your videos. Subscribed 👍
hi
thanks a lot for what U`ve done
my motor is good but it runs for a seond only and goes off immediately
I`ve changed capacitors contactor but no change
indoor unit works normal but not cold
what could cost that?
indoor or outdoor unit ?
Thanks much, you gave me trust in me , to do it myself, and finally realised it was a wire that was cut between to capacitor! Ac is back my boy!
thanks for all your feedback....keep up the great work and videos...
This guy is good, thanks you are my new Teacher
Great video. My ac stopped yesterday. Replaced the capacitor today. The fan didn't start, but I nudged it and it started, and cooled for quite some time, then stopped. The motor was very hot to the touch. Is that a good indicator that the motor is bad? I'm hoping I didn't burn up the compressor with it running without the fan. Thank you for your help and all the great info
I really appreciate you making these videos. You have helped me a lot! Thank you
This guy is good. Reminds of Linus of the computer world...
What's Linus RUclips channel ?
Great video, clear and simple, good job, thanks. If the fan motor goes on and off when the compressor is running, is this also a sign of bad fan motor? or there might be other issues? Thanks
Simple and to the point.
If you checked continuity between the individual wires and you didn't hear the beep, that would also indicate bad motor?
Yes. If there is no continuity, then the winding is open and the motor needs to be replaced. Although once in a while my meter plays tricks on me.. (perhaps it was weak batteries) I check for continuity and it doesn't beep. But then I check resistance and there is resistance..
I have an A/C system that is about 8 years old and the outside unit stopped coming on this past Sunday. I watched all of your videos, thank you BTW, but I can't seem to find the problem. I like to at least try to fix things myself but I don't know if I just wasted a day of no AC in the heat here in AZ. I tested my Compressor, I have continuity for all 3 plug ins, none of them are shorted out. My fan motor read 54.6, 35.8 and 90.3, so that looks good. My capacitor is a 45/5 Dual and read 47 and 5. I'm not sure what else I can do to check what's going on. I can press the little plastic button and the whole system turns on, but it does seem to be running a little slow. Oh, I also have 240 volts going to the unit. What else could be wrong ? Thanks for the help
Hi Earl! Sorry to hear that the AC quitting on you. Have you checked voltages in and out of the contactor? So 240v goes into one side and 240v should come out the other side when the little plunger gets pulled in. Also, you mentioned that you pressed on it and it came on. Does that mean the contactor plunger does not pull in on it's own? Does the coil get 24v when there is a call for cooling? If the contactor is not pulling in on its own, then I would start by figuring that out first. I have a video on 10 reasons why a contactor may not pull in if you need it.
Hrlo, Mr. Advice
Could you please kindly advice me about this..
thank you 🙏👍
I Just replaced capacitor but the fan not spinning .
( i didnt check the fan before replaced, ouch)
Inside the house ac is on but not cool.
could you please tell me what to expect and
to look at, ?
Does it's needs freon?
Connector or motor fan needs to fix, replaced?
How much about price range of a motor fan?
Thank you.🙏🙏🙏
Thanks for the video! My compressor turns on but my outside fan doesn't until I give it a push. Is that a symptom of something specific or should I just go ahead and check the ohmage of the fan motor? Thanks again!
I changed out the capacitor after reading online that several others had my exact symptoms. Turns out that was the issue and my AC is fixed! I paid $14 for a new capacitor and $11.63 for shipping compared to $115/hr just to get the problem diagnosed by a professional. Thank you World of Advice TV for the great content, you saved me some serious cheddar!
Excellent video, helped us fix our AC today!!
Replacing my capacitor fixed my problem. Still tested good. Just had a very very slight bulge on bottom.
Your video is always so good! Thank you...I have a spare fan motor from an old working condenser. I know it runs but the ohms are not adding up as supposed to: 31/82/95. Dose it mean it is going to die soon or something else? Thanks again.
Can a contractor cause a compressor to run and fan motor to not work ? I know it sounds like a capacitor but capacitor is fine and motor was replaced recently
Probably want to mention draining the capacitor before grabbing onto any wires.
That scared the crap out of me when he was poking around that capacitor.
How big of a charge will it hold without power ?
@@TWINDFL
Enough to blow a hole in your hand.
So if resistance between wires is common 58 other two wires 38-20 they add up however how much is to much or to less or does it matter as long as they add up
Excellent video. Checking mine tomorrow.
Thanks for your help. Did the resistance test on my fan and it showed it was bad.
Thank yoi for sharing video. I have a question when i check my ac fan motor with multimeter: the brown and black is 52.7, the purple and black or purple and brown are OL. Does it mean my fan motor is bad or just the purple wire goes bad? Thank you
Hey man, that looks super easy! Think I need to do some diagnostics on my unit. I'll look to you for guidance.
Thank. This lead me to the problem. It wasn’t fan.
I tested my motor according to your instructions, I got readings of 25.8, 24.2 and 49.7, how do I know of this is enough? Everything I have read said ohms should be between 80 to 120, this is on a lennox ml14xp1 4 ton unit
I am so happy to have found your channel. I'm working my way through your informative videos.
Heat Pump system.
Luke Warm air blowing inside.
Condenser fan not spinning.
Replaced Capacitor (still nothing... OG not the bad)
The Contactor is buzzing HARD. But no really hearing the compressor. I'm going to test it tomorrow. But in the meantime...
I'm thinking it may be the Contactor or Fan Motor but... based on your video all my fan ratings equal out.
My fan motor had a SIGNIFICANTLY lower Ohm rating than your video.
Purple to Black = 39.3
Brown to Black = 50.8
Purple to Brown = 89.9
Everything seems to equal up. But the 89.9 number is really low based on your video.
Does this seem right?
Thanks
Thanks for the guide, but quick question. My A/C is out - condenser comes on but fan does not. I've already changed the capacitor, which led me to check the fan motor with this video. However, my ohms are adding up. I got 38, 52, and 88. What's my next move?
Thank you for this helpful video and all of your other great videos. In my situation, the fan was not spinning and I used a stick to get it started. That worked temporarily. Then it stopped working and I discovered the main 240 volt fuses outside the house were blown. I replaced the capacitor and the contactor and coil. I replaced the fuses and they instantly blew. I checked the motor today and got resistances of 24.7, 57.8, and 76.4. They are a lot lower than you got in the video, but they roughly add up, so I'm thinking the fan motor is probably good (the motor is a 208/230 1/4 hp unit). The AC unit is a PH13NR048 manufactured in 2011. Any ideas on the next step? Is it time to call in a repair tech?
Thank,your videos are very precise and informative. I verified that my compressor is working and I've installed a new capacitor. I then checked the three wire"s you've shown on my condenser fan and get an OL reading from all of the wires. Does this mean that the fan is bad?
Hi Jay. My fan does not turn on by itself, but when the compressor is running and I start the fan spinning with a screwdriver it will keep spinning by the motors power. Is this pretty much a slam-dunk capacitor diagnosis? If not, what could be the issue? There is no abnormal heat nor sound coming from the fan motor when it is running
Replaced motor and capacitor after 25 yrs. Motor started to spin good ... 3 min later, fan is not spinning again. Suggestions?
Yes could not get to the point. This unit unfortunately is in direct sunlight most of the day, so I expect the parts on the unit to not last as long as they should. So oddly enough it eventually got to the 71 degrees a while ago. Do you think that maybe it could be that the compressor is starting to act up. The unit is 9 years old. The suction line is cool and sweats as you show in your video.
Great video my air compression runs but fan don't run is it safe to run just had installed August 3
So my AC unit has one of those Turbo 200X universal caps and a hard start kit. I'm not sure what the original cap was but the one that's in there tests at 10mfd and 175mfd. It's not bulging so I think the cap is ok. The fan doesn't spin freely and doesn't spin up with help but the fan leads tested at 27, 27 and 55 ohms. My guess is the fan motor is bad since it's really stiff to turn but I'm not sure how else I could confirm that.
Hey Michael! Even though the motor resistance readings are good, the motor still may be bad just like you said. The electrical windings may be fine but the motor bearing is not. If it is hard to turn I would replace the motor and capacitor. (the new motor should list in the specs which size capacitor it requires)
@@WordofAdviceTV Hey thanks a lot for taking the time to reply. The feedback and direction is really appreciated. 👍
Just wanted to follow up and let you know it was immediately apparent that my old motor was bad when the new one arrived because of how freely the new shaft spins. Got it installed and everything is good to go now. Thanks again for the videos!
@@Michael_303 Glad I could help! Thank you for the update, stay cool! :)
Your really helping, but theres one question, how to identify the common leads wire in condensor fan motor
There should be a little wiring diagram on the specs label on the motor itself. Usually it shows which wire is common there. Otherwise you can look on the condenser wiring diagram and see what color wire it is there. I also have a "how to wire a condenser fan motor" video if you need it.
I placed my fluke meter set on OHMS with the beeping sound for continuity it went from .OL to beeping on a new condensor fan motor. Are saying it's bad ? On regular OHMS reading it gave me the exact numbers that I needed a total of 118.6 OHMS.
Thanks for your great videos! If the resistances are good, what other reasons can a fan motor go bad?
A motor can fail electrically or mechanically. A meter won't help with a mechanical problem. A seized motor for example, where the bearing is shot. If you spin it by hand and it spins hard instead of freely, then the motor is bad. You can try oiling it, that might free it up. Usually the motor would get replaced though.
@@WordofAdviceTV Great! Thank you for the best advise as always.
God bless your family and business at high life forever...
Verified power going to unit. Replaced bad capacitor with a good capacitor, but fan still doesn't turn on. Ohm tested the three wires which come from the fan and the resistances all add up perfectly. Can the fan motor motor still be bad despite that?
Hi how are u ? I or already change capacitor and contactor , The motor and compressor still doesn’t work。when you put the contactor down is work. Can you tell me what happened ? Thank you
If we have an electric furnace and an AC(also works as a heat pump), how do we test if the heat pump is generating heat, while both the heat pump and the furnace can generate heat?
You are awesome and wonderful explanations and details. I do have a question thought. I have already replaced my motor fan and capacitor, but my fan is still not working. One of my fuse from inside the house, the 24v. keeps shorting. Can you tell what the problem might be. Thanks a lot. Keep up the good work!!
Hi jay For my AC it was short cycling and now the fan is completely off, checked both caps they are good , found that when I press the contractor both compressor and fan starts working so should it be the contactor might be bad.?
What's up Jay? I have a Trane split system heat pump and it isn't cooling like it should. I feel confident that it's the fan because it doesn't always come on when the compressor does and seems to cut off early and seize up but the resistance numbers added up exactly (41, 70 and 111) and I just changed the capacitor. Is it possible that the problem is still the fan motor or should I look elsewhere?
great educational video as always
I am not getting any continuity/resistance at an fan wire combination. Also, no continuity with any fan wire to ground. I have confirmed i am getting 240v to the contactor (brand new) and my capacitor specs out at the rated farad rating and not bulging at the top(replaced last summer). The fan spins freely so it’s not seized but it also won’t start when tapped with a screwdriver. I also noticed that the sealed bearing on the fan seems to be either leaking/lubed prior. As a last note, the fan motor gets hot but doesn’t spin when ac is turned on. I am really thinking the condenser fan is shot but wanted to see that if given these symptoms, has that been your experience as well..?
good video, another possibility is an in-line fuse.
Ah yes. Thank you for pointing that out!
a/c fan should turn on when heater is running?
Your videos are easy to understand! Really gave me a clear understanding how the system works and to troubleshoot. Having said that, I'm stump with the issue I'm having. The 24V sets the plunger down, but fan and compressor does not come on/no sound. There is 240V feeding into the two legs of the one-pole contactor. Disconnected the 240V from the breaker, with the plunger down, I get continuity between the in and out connectors on the plunger leg side. With 240v back on and the plunger down, do not get voltage at the output contactor terminals. If I jump the input terminal to the output terminal bypassing the plunger leg side, the compressor and fan comes on. I replaced the contactor and same symptoms. Am I missing the oblivious?
what ended up being the issue?
sounds like bad contactor. replace it.
Awesome bro..thanks for sharong your ecperience
RUclips University, saving me hundereds of dollars yet again.
Could you please make a video of the top five water heater problems I’m still confused about that topic
How long are those fan motors supposed to last? I had the motor replaced several years ago and the capacitor more recently. I also did a complete clean out of the condenser coils and the thing worked great until we had a bad rain storm, the only the compressor would run but not the condenser fan. I dont have all those fancy electronic testers like you so i just tapped various components with a stick and prayed to the appropriate entities but my problem didnt improve. I also wonder if that relay could be at fault . I used the stick on that along with some prayer and it also turned on the compressor with no fan. This problem began last august of 23. I still pray over it from time to time but to no avail. Im getting nervous with summer looming closer
What if my fan starts running only if I give it a push with a screwdriver? It does stay on once I help it. It turns real easy and it doesn't look like it's "stuck". Could that mean my capacitor is bad? (It does look like it's bulging, it's also 15 years old so I just ordered a new one, but was curious if the "fan needs help to start" is one of the symptoms of a bad capacitor).
What would cause a fan motor to overheat? I've replaced the capacitor with exact relpacement then when powering on, the old fan was noisy, probably the root cause of the capacitor going out on the fan side. Then I installed a new fan motor (exact replacement Fasco D934). AC would run for about 4 minutes before the fan shut off. Compressor was still running. The fan motor was extremely hot. Could I have a bad motor? Wiring problem? I'm running out of ideas. I really like your video's. Thank you, Mike of Chicago
Well presented thank you.
From Kenya Africa
Awesome video. Thank you sir. So in my case the fan starts and than about 2-3 after just stops. Yogurt thoughts or anyone else . Cheers
Awesome repair checking
Ordered a replacement capacitor to match the existing. 70/7.5 MFD 370V Round
Should my existing fan still not run (825 rpm ROT Cap 7.50/370 1.40A) can I replace it with a 6 month old motor from another unit? (1075 rpm ROT 5/370 1.8A) ?
If so, can I still use the 70/7.5 capacitor that I just ordered, or must I downsize? What size should it be?
The idea was to save money by using a motor I have versus spending $200 for a replacement 825 rpm unit.
So grateful for your videos and your advice.
Well.. Generally that is frowned upon in the HVAC field. You will increase the RPM by 250. Keep in mind that the fan blade is designed for 825 RPM. Which means the noise that the unit makes will likely increase. (sometimes dramatically from all the extra vibration) It would also affect the efficiency and operating pressures of the unit. The refrigerant side of things may be thrown off a bit which can result in the unit not keeping up on hotter days.
That being said... Yes, it can be done and people do replace motors with higher RPM replacements. Maybe you will get lucky and yours will work just fine. Or it may start to occasionally overheat and stop. Also, you could probably just get a different 5 MFD capacitor for the fan motor and use the 70 for the compressor. But with capacitors, going from a 5 to a 7.5 is a big difference and not recommended. I hope that helps! To summarize, I would not recommend it but it can be done and it probably will work. We do that in the field sometimes but only temporarily until we can get the right size.
A million thanks for your complete and rapid response. I should have stated that I have the complete 1075 rpm motor, fan blade and grill and that I live in the desert of Southern California. 120 degrees here this week. My unit's brown wire was connected to FAN, Blue to HERM and Yellow to C. HOPEFULLY, the dual capacitor I have on order will solve my issue. Just in case... to utilize a separate 5 MFD and the 70 for just the compressor, I would be truly grateful for your wiring directions, should you find the time to reply. Might you have a recommended replacement and source for the existing GE Commercial Motors by Regal Beloit 5KCP39LF 825 RPM motor? With sincere thanks and deepest appreciation.
Oh boy, 120 degrees sounds mighty hot! Well if it comes with the fan blade, then that does improve the odds! It would be worth a try I suppose. But I agree with you! Hopefully the capacitor will fix it for you! That would be best.
The wiring for a separate 5 MFD capacitor is pretty easy. If the new motor has 2 brown capacitor wires, then those 2 wires would simply both go to the new capacitor instead of the dual capacitor. If there is only one wire from the fan that hooks up to the dual capacitor, then you would put that wire on one side of the separate 5 uF capacitor and then for the other side you would put in a jumper wire going to the common on the dual cap. I hope that makes sense..
Unfortunately I am having troubles trying to look up the motor that you mentioned.. 5KCP39LF is that the part number on the motor itself? I think being that it is a commercial motor it will be harder to find the OEM since they mostly only sell to contractors. The most important part is that the RPM, HP, and voltage line up. The length of the shaft sometimes too. If the screw holes don't line up, you can always drill new ones.
SUCCESS ! You are a GENIUS. A million thanks for sharing such valuable information with us all on RUclips. The new capacitor arrived, and as you predicted, condenser fan started right up ! My worry for fan replacement was for naught. But it feels great to be able to enhance my knowledge. Thank you, kind Sir, for sharing your skills with me. I remain truly grateful ! P.S. I bought a voltage pen to hopefully prevent any shocks. Again, I thank you.
What would cause a fan motor to stop running? I turn the thermostat to cool and the system initializes but to get the fan spinning I have to spin the fan and then it will start. After several minutes the fan stops and the compressor stays running. It's a new fan motor. I have also replaced the start / run capacitor and the contactor, and then the fan motor, in that order.
Hm.. That's a tough one. I can't tell you what's up with it without checking it out.. From what you described, it sounds like either you have a bad fan motor right out of the box or perhaps you are low on refrigerant. It could be a voltage/wiring problem too. Hard to say without seeing it.
Did you ever figure out your issue? My unit is doing the same thing. Compressor turns on but fan won't start until I give it a push
Thanks for your videos! I've watched pretty much all of them to do with HVAC. My heat pump unit has started tripping the in-house circuit breaker instantly every time it starts up. If I disconnect the fan leads from the defrost control board so that the fan is out of the circuit, the compressor starts up just fine and the breaker doesn't trip.
I tested the capacitor and it is good. I ohmed out the motor and it appears fine. I swapped in a replacement motor anyway and the same short circuit occurs. Does this mean the short is happening in the defrost board? The defrost board controls the main contactor for the compressor and a relay for the fan, but I don't see any damage to the board. It's a Trane CNT02940 defrost board, which I think is supposed drive the fan at 2 speeds. Should I be seeing 240V across the fan motor contacts when the compressor is running, because it looks more like 9 to 12 V.
Jay, thanks for your informative videos. I have an old Trane system which is still working pretty well, but the condensor fan is shutting off intermittently. I checked the resistances between the wires as you advise in this video and the sum of the 2 equal the 3rd indicating the motor is good. Is it shutting off due to internal heat protection? Would a new one do the same thing? The condensor unit is in the direct sun in the afternoon, so it gets pretty hot there when the outside temperature gets to 90 degrees or above.
you ever figure this out?
Im noticed both my fan and condenser arent kicking on. And the capacitor ive had to replace 3 times this month. Luckily its cheap. Fan motor is at .6 when it shoukd be at .5. Is that enough to kill the capacitor?
Capacitor is good. Checked resistance of fan wires - 2 lower numbers did add together to the higher number which was right around 100. Fan continues to overheat and shut off after 7-10 minutes. Could a fan with proper resistance still be failing? Or should I look elsewhere?
Good questions. Did anyone provide an answer? I also need an answer.
Good evening sir I have allied ten ton ac my fans not working compresor working blower is all 3 contacspunching in I my low side pressure 130 and my high pressure is 225 i don’t have 24 volts in my fans relays from my board jumping 24 volts and are you know what could be wrong
I’m replacing a condensing fan motor and the only difference is the FLA. My original motor has an FLA of .77 and the new motor has .63 FLA. Can I use this new motor?
Yes. If that is the only difference, you're good to go. 👍
If the fan is locked up, should you be able to freely move it
The fan in my outside unit Is not working. I tested the single capacitor sand it reads 45mf., so it is good. There is no capacitor for the fan. Rheem brand. I can assume it is the fan motor?
A trick : watch series on flixzone. Been using them for watching lots of of movies lately.
@Calvin Oliver yup, been using Flixzone} for months myself :)
Im kinda confused so if the meter reads Ol that means no continuity and its good so basically you be getting OL only ?
My fan is buzzing and starts with a push...is that a starter or cap problem ? or just within the fan motor itself ? Thank you.
Hey Jay! I swapped my capacitor out since my readings were 28/3 on a 35/3 capacitor. I also checked the fan wires and got 159 , 122 & 37 between the wires. The fan still won’t start until I give it a push a few times. Do you think the condenser fan motor can still be bad even though readings add up? Should the fan wire lower readings be more even?
Thank you for the great explanation video. I have a situation - neither the compressor nor the fan is coming on, and no noises. I changed the capacitor to a brand new one; checked the voltage before and after the contactor. When I check the voltage on the two contactor leads, it's zero; but from either lead to the ground is 120V. Is this normal (i.e. no 240V on BOTH contactor leads but 120 on each to the ground). Could this be the reason my AC is not working? The blower fan inside inside the furnace is working; the thermostat is Ok (checked it by bypassing it with a jumper as per your other videos). It's a Carrier CA13 unit. Thank you
Turns out the issue was a failed service disconnect switch. I replaced the switch and the a/c is now working.