Fan buzzing at idle speed (2000 rpm)

I have a new (2 months old now) 13" MBP. Since new, it has a buzzing noise coming from the fan, which is most annoying at idle speed. I know it is the fan as it ramps up and down with the fan speed. It sounds like the rotating part is lightly ticking on something. If I angle the base, it goes away. I've had the back off to upgrade the RAM, and I carefully inspected the area, but can't see anything the fan would be touching on. Any suggestions as to how to fix this?

MY MBP 15 " ( Nov 2008) has recently had a couple occasions when suddenly the computer starts buzzing.Softly and then gets loud,like a couple of angry hornets.
I shut down the laptop and when I reboot, the noise is gone.
I also seem to think the noise occurs ONLY after I have ported the laptop
I usually carry it in well padded cases but I leave it in sleep mode. I do not always get the buzzing. I have now heard it three times in two months.
Heard it again tonight . I had carried the laptop around my apartment (it is usually stationary connected to my big monitor). Was working with the laptop on my lap. A couple of hours into my working the buzz came.
is it possible there is some internal part which moves when I carry the MPB? But the fact it immediately goes away when I shut down (does NOT go away with restart) would argue against that idea.
Have any of you had this type of experience.
?

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My fans don't go above 2000 rpm when my computer wakes up from sleep

Only when I shut down my computer, and turn it back on do they work. Is there any hope this will get fixed?

What do you do when it behaves correctly immediately after an SMC reset but then the issue persists and the fans fail to increase speed after he wakes the computer up from sleep?
To test, I would back the drive up and install a fresh system to eliminate a software issue.
Dave M.
MacOSG Founder/Ambassador  An Apple User Group  iTunes: MacOSG Podcast
Macsimum News Associate Editor  Creator of 'Mac611 - Mobile Mac Support'

Does fans in macbook pro 13 schoudl still run 2000 rpm?

Hi i have problem with my macbook pro 13' when it gets high temperature around 95 c fans are still runing at 2000 rpm schoudl they do that or rise

You don't want to use a fan control app because they override the sensors in your MBP.
At 90ºC, I would think that the fans should be running at a far greater speed than 2000rpms. Mine can rev up to around 3000-4000rpms when the machine is really being overtaxed.
I would still recommend taking your machine into an Apple Store or an AASP and having it checked out. If your fans aren't working correctly you could be headed for a thermal shutdown.
Clinton

Fan Buzz

I have an early 2008 MacBook Pro and over the last few months I have started hearing a buzzing noise. It sounds like a bee or a mosquito buzzing and is coming from behind the upper right part of the keyboard. I'm quite sure it is the fan because it gets a bit louder when the fan speed increases. The speed of both fans seem to be correct though as they hover consistently at 2000 rpm and increase appropriately if the machine gets hot.
If there is any background noise going on in the house I can't hear it, but when I'm working quietly (most of the time) I can hear it buzzing away. If I put my ear up to the machine on the left side all I hear is a gentle sound of air movement, so the right fan is definitely sounding different from the left.
Even though it really isn't all that loud, it is quite annoying, and I'm certain it wasn't there when I first bought the machine.
I've heard some say that their MBPs are so quite they didn't even realize that the fans idle at 2000 rpm all the time. So here's the question. Is ANY amount of fan buzzing abnormal, and therefore something that should be fixed under warranty?

Is ANY amount of fan buzzing abnormal, and therefore something that should be fixed under warranty?
Yes and yes. Visit an Apple Store (if convenient, and if so, make an appointment first) or call AppleCare.

Fan running at high speed (iMac 2011)

I'm using an iMac mid-2011 model, 21.5". For the past few weeks, I'm facing an issue where the fan runs at high speed (>3900 rpm). This generally happens when I use the mac for more than an hour with simple tasks like browsing, checking mails, working on word / powerpoint, etc. If I play a game or watch a video, it happens faster in 15 - 30 mins.
I've tried SMS reset several times but it did not help.
I also ran the apple hardware test (extended testing) and got the following error:
4SNS / 1 / 40000000 : TS2p - 121.250
Could anyone help me understand what this error means?
Thanks.

There is a sensor error. That is most likely why you are experiencing the problem. Take it in for service.

Idle Fan speed 4400 RPM after fan replacement

Several months ago the left side fan on my MBP died as the result of a worn bearing. The computer is covered under Apple Care so I sent it in to have the fan replaced. Ever since the fan was replaced the idle speed on both fans is in excess of 4K rpm even when the CPU shows minimal activity. SMC fan control is set to 2K rpm. iStat Nano widget displays temperature at 120 Degrees Fahrenheit and fan speed at 4500K. I took my MBP back to my local Apple authorized service center and told them what was occurring since having the fan replaced. From Hardin Apple service center in Arlington my MBP was shipped to Houston Texas where Apple Service Technicians replaced the Logic board. I have since reset the PMU by removing the battery and holding down the power button for 5 seconds. I have also run the Apple Hardware Diagnostic test using the install disc which showed no hardware malfunctions.
With the CPU 95% idle the fans should not be running anywhere near 4K. Despite two trips to Apple Service my MPB still has a fan probably which is not only annoying because of the increased noise but it is affecting my battery life as well. If anyone has any ideas as to how to fix this problem which I have not already attempted please post them. I am hesitant to send my MBP back for more service at this time due to their failure to fix the problem the first time or check the results. They were aware of the problem when I sent it in for service and when they returned it to me the same problem persisted. This type of service does not inspire customer confidence.

I'd be inclined to try an "archive and install" of the OS, Jason, and leave off any third party "add ons" like SMC fan control for the moment.
Alternatively if you have an external HD then you could try installing a "clean" copy of the OS on this and using it as the boot drive, to see if this overcomes the problem
There are OS software elements to the process of fanspeed control and if these are corrupted then the fans are likely to run at "failsafe" speed.
Another possibility may be that a temp sensor hasn't been properly re-connected, again resulting in "failsafe" sped operation.
Rod

Fan buzzing noise at 6000 rpm.. Sound worst when tilted on any axis...

My macbook been overheated since the Snow Leopard upgrade but what really anoy me the most is that the fan make a buzzing sound over 6000 rpm and when I pick up the MBA is tilt in any axis it make a noise like a fly is right next to your ear and it also feel like the fan is loose or somthing. Is that fan sound normal for those who got a macbook pro. Try tilting the laptop a little and does it make a weird sound? I keep thinking is a defective fan or something is loose that relate to the fan.
Does this happen with your guys macbook air? Is this normale of should I bring it in and see if I can get my fan replace.
I can barely hear it at 2000 rpm but at 6000 is really anoying to work with the computer for me...

I would get it check out. It might be the blase hitting or a motor bearing.
Dave M.
MacOSG Founder/Ambassador  An Apple User Group  iTunes: MacOSG Podcast
Macsimum News Associate Editor  Creator of 'Mac611 - Mobile Mac Support'

Macbook pro 13" june 2009 fan rpm remains at 2000 rpm when temp is 85c

Hi,
I've just bought a new macbook pro 13 inch and updated software vis software update.
I've noticed that the fan rpm went to 2700 rpm on every boot but
after a few minutes it goes down to 2000 no matter the temperature is
I'm using iStatPro to see the temp and fan
I've tried open youtube videos to raise the temperature to 71 but the fan remains the same at 2000
Please advise.
Thank you

Thank you for the info
I've just tried resetting the SMC but no luck.
since this is my first mac computer so I'm not sure if this is normal or not
after an investigation with different scenarios of work load I found that
room temp : 27c
cold boot : cpu 45c
: fan 2000 / 2700 rpm
warm boot : cpu 58c
: fan 2000 / 2700 rpm
running parallels
with windows 7
and visual studio : cpu 75c
: fan 2000 rpm
The fan did kick in to 3500 rpm once the temp is 85c
I'm not sure if this is normal or not since my Dell M1330 xps
which running vista and visual studio shows only
cpu: 58c
fan: 3000rpm
Thank you
I'm not thinking about using SMC fan control to set the default to 3000 rpm
and use it only when I work on Windows but not sure if the program will damage
my new baby or not
Thank you

GT70-2OC-408US Fan goes to max speed when idle

Just as the title says. The main fan goes to maximum speed when the computer is left idle overnight. Putting the computer in to sleep mode or restarting the machine solves the issue but that is quite annoying. This happened on both the stock install of windows 7 home edition and after I did a full wipe and re-install of windows 7 ultimate. I have looked at the bios update section and there are 2 bios updates for windows 7 but I do not know which one to use and there isn't much documentation with on it. Any help would be appreciated.
Thanks in advance

Hi I have a similar problem, the fan goes full speed from time to time when idle or when using youtube, facebook, etc. And the FAN will never slowdown again until i turn off the laptop or put it to sleep. What I have noticed is that the integrated video card runs hotter that the 770m discrete card not sure if that's the one triggering the fan at full speed.
I found a post about a fan controller for a msi gt70 2od laptop and it works, it truly modifies the fan speed, but not sure how good that is, because if the fan is being activated because of the card getting hotter and the fan is set to 10 or 20% it may not be enough to cool it down and keep the temperature at safe levels at least while leaving the laptop on all night long unattended.
hxxp://forum.notebookreview.com/msi/718530-official-msi-gt70-2od-owners-lounge.html (Dave Pearson's GT70 2OD FAN CONTROL v1.2, and photos of this can be seen)
BTW the fan started to work at full speed after I installed windows 7 ultimate 64 bits and continue to work this way even when I went back to Windows Home Premium 64 bits. Also a 8GB ram module was added to this laptop.
If you were able to solve this issue please post the solution here, so everybody is aware on how to solve this issue.

Fans stuck at 2000 rpm

i received leopard earlier today and installed it, and since then the fans are stuck at 2000 rpm (+/- 5 rpm).
during normal use this is okay, cpu temperatures stay at about 52 C/125 F. but if i start any more processor intensive application (vmware fusion, civ IV, etc.) the temperature rises up sharply but the fans stay stuck at 2000 rpm. when the cpu temperatures reach 80 C/176 F i kill the app because i can't afford to burn my processors.
on 10.4.9 the fans would be running at 6000 rpm at those temperatures...
does anybody know what's going on? i'm feeling a bit panicked and don't dare properly use my mac...

wow! you are a lot braver than i am. i didn't dare let the temperatures go over 80C.
but following your example i decided to test too, and at about 82C the fans started ramping up (though slowly!) allowing the temps to reach over 87C before lowering them again to 80C at about 500 rpm.
it just seems freakily high to me, i hope the apple engineers know what they're doing.
anyway, thanks for testing this for me and solving my problem, i'm more at peace now.

Macbook Pro Fans Running At Full Speed When Macbook is Very Cooool

Ok, So now i'm pretty sick of the fan noise.
I've done PRAM reset, Power Management Reset to no luck.
So i decided to do some experiments.
As soon as the computer starts, Fans spool up to 6,000 and stay there. CPU Temp 42 Degrees Celsius.
Now My CPU temp does pretty well staying there. In Activity Monitor, No Processes of what so ever. Computer idles at 99% and only 1% being used by system.
So i decided to put the computer in the fridge. As soon as the temps went down 5 Degrees, to like 30 to 35 Degree Celsius, Fans idled at 2000 and as soon as the CPU temp is 40 Degrees, Fans spooled up and kept going all the way back to 6,000.
See as the temp drops on the computer, the fans do slow back down as the CPU temp drops from 40 to 35.
I called apple and the apple tech i talked to said that it seems the fan specs might be set out of whack. Meaning, the temps as which the monitor spools up the fans is set to low. He said it should be around 50 to 60 even 70 Degrees Celsius's before fans should spool up. He said the problem isn't the monitoring system since it does appear to be slowing down and speeding up the fans between 30 to 40 Degrees but it's spooling the fans up and to low of a temp than needed. He told me to take it to a Mac Genius sometime soon.
so before i do that, any apple geniuses what to take a stab on whats wrong and why it's doing this?

My fan runs continually, BUT, with several monitors watching core AND fan exhaust temps I have noticed something strange. The core indicates 28C while the exhaust jumps from 42C DOWN to -128C and then the fan races. While this is keeping the book cool as a cucumber it is driving my wife and now me up the wall. NO I don't have any hung processes. NO the CPU is not caught in a cycle requiring massive computing power. Regardless of the temp the fan runs at the 6200RPM max. Zapping PRAM and resetting the System Management will soon be followed by gravity resetting through my 2nd story apartment window. One way or another this needs to stop!

Macbook May 2010 edition exhaust fan runs at full speed

Bought a new Macbook around February 2011. Yesterday all of a sudden while watching Netflix, the exhaust fan started running at full speed (Approximately 6200 RPM). I thought the machine was overheating. So I immediately shut it down and let it cool. But I noticed the machine was barely warm.
When I started it up again, it started making the same noise with the exhaust fan running at full speed. I installed SMCFanControl and I see that the CPU is barely warm - 35-37C and yet the fan is running at full speed. I looked at the CPU/HDD usage and there is barely ANY usage (~90% idle). Nothing out of the ordinary. So it definitely doesn't seem to be a heating issue.
In order to troubleshoot this I have done the following:
1. Installed latest upgrade - Snow Leopard 10.6.7
2. Reset SMC
3. Reset the PRAM
4. Tried booting from the install DVD. There as well it exhibits the same issue.
Neither of these steps have helped me with my situation. I would really hate to go to the apple store as its always crowded and would end up wasting time. Are there any other steps I could try?
Update: I tried running the Apple Hardware Test from the DVD. This is the error code that I got: 4SNS/1/40000001: TN1D- -1.000
Can someone please tell me what this means?

I don't know what that code means for sure, but it sounds like one of the temperature sensors may have died, so the fans just run at full to cool.
I would take it to the apple store.

G500 fan running at full speed for no apparent reason

I have G500 that worked perfectly for a year now. My operating system is Windows 7 Professional. Yesterday the fan started working full speed while the laptop was idle, I wasn't using it and the software that was running in the background were the usual programs I have been running for the last year. First step was to check the temperature of course, which is normal. Then I checked if anything weird is running in the background and creating high cpu usage, but that was not the case either. What I noticed though was that fanspeed is not recognising the fans or counting their speed. Is it a problem on the hardware? It is really annoying. The speed also fluctuates very often, reminds me of how it should work while gaming and definately not when idle.
Thanks

Hi Zoe,
Welcome to Lenovo Community!
As per the query we understood that you are facing fan issue in your G500 laptop.
Please try to boot the system to safe mode and check for the issue.
Also perform a clean boot and check for the issue, if still the issue persists try to update the BIOS and check for the issue.
Click here for the BIOS update.
Hope this helps. Do post back if issue persists!
Best regards,
Ashwin.S
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HELP- mac mini fan just sped up to 5500 RPM

mac mini fan just sped up to 5500 RPM
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The first thing I would try is to perform an SMC reset on the system:
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Thank you for the reply! I can't seem to find a black and white sticker. There is a sticker which is black with light grey text. Is it one of these two numbers? label P/N 0B07208CT1 label P/N 0B95210 I am not using any fan control software. Also, my BIOS version is the latest available from Lenovos support site. (when I update the BIOS last time, the fan was running at very high RPMs for a while during the install. So it seems it would be possible for it to run faster)

Fan buzzing at idle speed (2000 rpm)

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