Fans running at 0-1500 RPM

Hi,
I have a 3 month old macbook pro 15" 2.66GHz with 4GB of ram. Over the last ~2 weeks the fans were running very loudly at high RPMs and had a low rumbling sound at idle. A few days ago I noticed the right fan at 0 RPM, however after a few minutes it picked up to around 1100 RPM.
Currently both fans are running at low RPM, I tried running a hardware check with the apple cd but the computer overheated and shut down before it could finish. When restarted both fans were at 0 RPM as seen in this screenshot. http://img33.imageshack.us/img33/6116/picture1qyn.png
After a few minutes both fans started but couldn't reach idle speeds. http://img21.imageshack.us/img21/7403/picture2bos.png
I have tried smcFanControl but the fans will not go any faster.
Any ideas on what could be wrong?

It's under warranty so take it in for service. There's obviously something wrong.

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Fans running too fast-6K rpm

I noticed the fans running fast a couple days ago. There does not seem to be a reason of this—temps are low (I think): nothing is reading higher than 46°.
What might be causing this? What should I do about it? Is there a danger aside from burning out the fans?

There are a couple of other things to try:
Open Activity Monitor and see if you have an out of control process. Select "All Processes" at the top and CPU in the bottom bar. Look for something hogging the CPU. Sometimes a printer process will hang up and do this, but it could be almost anything.
Run the extended version of the Apple Hardware Test. It may be that a thermal sensor has failed or become unplugged, and if so, the fans are set to run all out by default.
Burning out the fans is the first danger. Burning out your computer because the fans aren't cooling it is the next danger.
Good luck!

ODD fan running full speed, 0 rpm read through smcfancontrol

Hello,
I have a 2011 iMac 21,5 inch. I replaced the harddrive and the known fan problem arose. The HDD temp couldn't be read.
I therefore installed a 7 pin cable instead that is able to read the HDD temp and the fan seems to be working fine.
The ODD fan on the other hand is running wild. It starts when I start the computer and doesn't stop till i completely switch it off. When i
look at smcFancontrol, and all the other programs, the stats show 000 rpm. Temperatures seem good and logical. I also tried
installing another ODD fan, reset the SMC and the PRAM.
When i look at the Apple Hardware Test (AHT) the following error occurs: 4MOT/4/40000002: ODD-0
Any suggestions on what the problem could be?
Thanks!
Kind regards,
Bas

I did a full check of the iMac. Checked every cable and connector. I found out that one of the pins in the connecter of the optical drive
was slightly pushed back. After seeing the pin to it's position and connecting all the components the iMac is now reading an ODD rpm again .
I am slightly skeptical about the pushed back pin being the problem because my idea is that the RPM is directly related to the different connecter
(temp. sensor ODD). If anyone could give me an answer to this, I welcome it, but for now the computer is running perfect. I am going to do a full
reinstall now to check if everything is running normal in original state (without smcFan control).
Thanks for your help thus far. Hope this discussion helps others as well.

Loud Fans Running Around 6,000 RPM

Hi, I have a MacBook Pro that i bought about 2 1/2 years ago. It has NEVER been dropped, but recently I have been having many problems. All of a sudden it won't stay latched shut and most importantly the fans hum so ridiculously loud that I can't even think straight. After about 5 minutes on the computer it starts going crazy. I just downloaded the iStatPro and it says that my right and left fans are operating between 4,000-6,000rpm. (6,000 when it's really loud, 4,000 at a soft hum) I'm really hesitant to take my computer apart looking for dust or anything but can anyone help me fix this?
Model Name: MacBook Pro 15"
Model Identifier: MacBookPro2,2
Processor Name: Intel Core 2 Duo
Processor Speed: 2.16 GHz
Number Of Processors: 1
Total Number Of Cores: 2

For the latch not working, check out the comments posted to this U-Tube video:
http://www.youtube.com/watch?v=suAPc7jp1I8
If your top hooks in the display part of the latch are OK, then it may just be a matter of getting the bottom part working again.
If the other solutions don't work, also run the extended version of the Apple Hardware test to see if perhaps a thermal sensor has stopped working.
Good luck!

Loud Fan with Fans Running Around 6,000 RPM

Hi, I have a MacBook Pro that i bought about 2 1/2 years ago. It has NEVER been dropped, but recently I have been having many problems. All of a sudden it won't stay latched shut and most importantly the fans hum so ridiculously loud that I can't even think straight. After about 5 minutes on the computer it starts going crazy. I just downloaded the iStatPro and it says that my right and left fans are operating between 4,000-6,000rpm. (6,000 when it's really loud, 4,000 at a soft hum) I'm really hesitant to take my computer apart looking for dust or anything but can anyone help me fix this?
Model Name: MacBook Pro 15"
Model Identifier: MacBookPro2,2
Processor Name: Intel Core 2 Duo
Processor Speed: 2.16 GHz
Number Of Processors: 1
Total Number Of Cores: 2

Note that you have posted in the wrong forum. This is the Mac Pro forum, not the MacBook Pro forum.
The problem you've described may be caused by a runaway process. Open the Activity Monitor in your Utilities folder, set the Processes drop down menu to All Processes. Click twice on the CPU column to display in descending order. Look for a process using a lot of CPU time and/or may be displayed in red. If you find one then select it and click on the Quit icon in the toolbar, then click on the Force Quit button. Note down the name of the process as you may need to track down why it wasn't working properly.

Fan runs too fast after SMC update

About a week ago I updated the SMC of my Macbook 7.1 (mid 2010).
I even leaved it sometime (days or weeks) on the list of software updates without installing, as it said I should not touch until it was done and it was to fix some compatibility with hardware that I don't have. So I did it at a time I would not do anything.
Since then, the fan began to work at full speed almost permanently, sometimes it slows down to normal operation (really normal, increase rotation when the device heats up, slow down to 2k rpm when it is cold).
I have formated the HD twice, because I tought that had done something wrong, but the problem persisted, so I used the hardware diagnostics and found two error numbers, one for the fast run:
4SNS/1/40000001:TN1D - - 110.00
And another for the extensive test:
4SNS/1/40000001:TN1D - - 1.000
I searched these numbers but the results are not good nor precise, peaple said it's related to thermal detector or the logic board permanently damaged.
My current SMC version (after the update) is 1.60f6
I don't know the old version of SMC.
I installed iStat PRO widget, from where I can see that all thermometers are operating normally (these must be the source of the control of the fan) and the fan running at 6,200 rpm.
I even tried to install Fan Control system pref component, but it can only increase the commanded speed of the fan at any time, never decrease.
I also tried to reset SMC as said in http://support.apple.com/kb/HT3964 , sugested in https://discussions.apple.com/thread/1306035
Is there a way to roll back to the old SMC version?
Or to install some program to overwrite the wrong control?
Thank you.

you need to bring it to an Apple store or AASP to have it properly diagnosed. Only Apple certified technicians have access to what those diagnostic codes mean.

Are my fans running too fast?

Hello,
recently I got my rMBP; the basic specs, I am really happy with it, no displays issues or any wierd sounds, but when my Mac gets a bit higher load (e.g. playing Trine 2, my MBP gets around 60 degrees celsius at CPU and 65 at GPU) the fans run at around 5000 rpm, while the left fan is alway faster by about 300 rotates. Hands down, the sound is ok, but I am worried about the speed, is it normal to get such high rates? At minimal load, it is about 1900 rpm so you can't hear it all.
Thanks for all your answers

I've seen fan speeds close to 6000rpm reported here, so I wouldn't worry. The computer is doing what it is supposed to do: increase the fan speeds as needed to keep it cool. Enjoy your new computer.

Macbook Pro 2011 Fan cannot run higher than 1000 rpm

My MBP fan is making loud noises like something is jamming it so it has to work harder than usual to spin. Right now it is running at about 900 rpm according to smcFanControl. My temperature is ~60ºC (not sure if this relevant).
I have tried taking off the back cover and cleaning the dust off the fan with compressed air. This significantly lowered my temperature from ~70 ºC to ~50 ºC.
If more information is needed, please specify what and instruct me how to find them.

You don't mention which MacBook Pro you have, but in any case, if you look at the instructions for opening the system to replace the HDD/SSD then you should be able to see the cooling fans. Take a look and make sure they don't have a large dust build-up, and possibly even use a can of compressed air to clean them out a bit. I know that I need to do that with my system a couple times a year due to dog hair & dust build-up, but my fans never get as bad as yours seem.
If you are still under Apple Care, you might want to make an appointment at a Genius Bar and have them take a look at the system. If it is a bad fan, and you are still under Apple Care, they will fix/replace it for free.

Fans running at top rpms

I have a Xserver G5, with 10.3 , as soon as i turn the unit on, the fans ramp up to max rpms and don't reduce. Any ideas on what is wrong??

It's normal for the fans to ramp to high speed initially at boot, but they should throttle back once the boot sequence gets underway.
I would start with an NVRAM reset.
If you're running the Xserve headless, there are instructions in the Xserve manual how to do this:
*+Follow these steps to initiate a command from the front panel.+*
1) With the power off, hold in the system identifier button while you press the on/standby button.
2) Continue holding in the system identifier button until the top row of blue lights blinks sequentially.
3) Release the system identifier button. The rightmost light in the bottom row turns on. Press the button to light the next light in the bottom row, moving from right to left. Press the button again to change lights.
The lights in the bottom row indicate (from right to left):
• Light 1 (far right): Startup from a system disc in the optical drive (on a system with an optical drive). This also ejects any disc already in the optical drive.
• Light 2: Start up from a network server (NetBoot)
• Light 3: Start up from the internal drive (leftmost drive if more than one)
• Light 4: Bypass the current startup disk and start up from any other available startup disk
• Light 5: Begin target disk mode (all drives, including the optical drive, will show up)
• Light 6: Restore the system’s default settings (reset NVRAM)
• Light 7: Enter Open Firmware (via the serial port if no monitor and keyboard are connected)
When the light for the action you want is on, hold in the system identifier button for at least 2 seconds, until all lights in the top row are on.
Release the button.
-Doug

IMAC G5 fans running at high RPM

Hello,
I have a 20" G5 iMac and just had the motherboard replaced under warranty. Since the replacement my fans will start to run at very high rpm's fr no reason. It will happen even when the computer is not being used and no applications are running. It is currently at:
CPU 122 degrees
CPU fan 2996 rpm
HD 124 degrees
HD fan 4178 rpm
System fan 3098 rpm
I have called applecare and they had me do several resets which seemed to help for about 1 hour and then the fans have ramped up and not gone down in the past hour. This last time I was watching TV and heard a noise from the computer and low and behold it was the fans. Nobody was working on the computer and all apps were closed. I bought this computer in September 2005 and have had 2 lcd's replaced and a logic board replaced. I am getting frustrated with this, my first, Apple computer. Does anyone have an idea of why the fans are running so high? I never had a problem like this with my old logic board.

Have you looked in Activity Monitor to see if any applications are causing the fans to run? Applications/Utilities/Activity Monitor.

Imac fan running at high RPMs

My IMAC fan was running just fine then yesterday the fan started running continuously at high RPMs. Computer otherwise runs fine. what can i do?:

Welcome to Apple Discussions!
Ignore it, unless you see 4 language screens saying you must restart, or the machine shut down on its own.
P.S. Odd you posted this to a forum that has nothing to do with your iMac or operating system. Was that glitch with the forums, or your mistaken navigation, or is your system the issue is happening on not the one shown with that operating system?

Macbook pro fans running at 6200 rpm,running slowly and 35deg C?

About i week ago i was noticing significant slowdown in the operation of my mac. Yesterday the slowdowns were so much so as to render it useless.(30+seconds to realize that i had scrolled). I had just downloaded SOPHOS...it found nothing. so i assumed installing it had done something. i proceeded with a clean instal. After a few trys i was able to reinstall and boot up. The computer is functioning but not at the level of a wiped mac. there is still lag as i write this sentence, and at almost every action i see the pinwheel. I did a reset of the SMC and there are no hogs of CPU in the Activity Monitor(All programs). I downloaded a wiget to allow me to see temperature and fanspeed. the highest temperature is 35 degrees C and that is of the CPU, yet my fans are still posting speeds of 6204 rpm.
To make matters worse i'm overseas and cant seem to find information on a genius bar near me.(Toulouse France)
I feel like ive tried everything.
-Highfan speeds
-Laggy functioning (akin to a 5 year old PC).
Macbook pro
2.4 Ghz Intel Core Duo
4Gb 1067 MHz DDr3
Ive only had this this a year and a couple months(warrently just ran out) im prepared to have to pay to fix but has anyone had similar issues? any estimation on what it would cost?
I find it incredibly coincidental this happened the day steve jobs died....
Thanks for any help or advice you can offer.

Backup your files before doing anything. May be a dying hard drive, would account for slowness. Software update fully.
Perform a hardware test
https://support.apple.com/kb/ht1509
that should tell you if it's a bad sensor or something
And yes, perform another SMC reset because your symptoms are typical
Fans
The computer's fans run at high speed although the computer is not experiencing heavy usage and is properly ventilated.
Follow these instructions again
https://support.apple.com/kb/HT3964
Next try a Safe Mode boot holding Shift key see if it continues.
Next create a new user and log into it, then log into it under Safe Mode
https://support.apple.com/kb/HT1455
If it's isolated to one user, then there's something bad in there
Do a Restoring OS X 10.5 10.6. 10.7 - simple overwrite OS method
https://discussions.apple.com/message/16276201#16276201
Check your Flash here and update
http://flashbuilder.eu/flash-player-version.html
Run a malware scan with the free ClamXav
Run ALL of OnyX's cleaning and maintenance aspects and reboot
http://www.titanium.free.fr/

Macbook fan running at high rpm when doing nothing

My macbook a1181's fan is always running at a high rpm and a can't figure out why. I already checked the activity monitor, made sure there was no documents waiting to be printed (i have had this problem in the past), and I removed and cleaned the fan and vents. Could os x 10.7.5 be part of the problem? I had absoutly no issues with 10.6.8.

Check your activity monitor. Sounds like you have a program running in the back ground your not aware of.
You might also try to reset the SMC and/or PRAM.

Just replaced my fans, running at 000 RPM

Hi guys,
I recently replaced the fans on my macbook pro because they were making horrible buzzing noises sometimes. I ocassionaly run games and movies on my laptop, and have not had much problem with overheating. However, after i got my new fans simple tasks were causing my mac to overheat and slow down my mac in general. I downloaded an application called SMCFancontrol to get my fans running, but no matter what i changed in the preferences, my fan speed stayed at 000 RPM, and simple tasks overheated my laptop. I guess my question is why is this happening and what are the easiest solutions to fix this?
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Thanks

You did not install the fans correctly or did not connect the cables correctly or the fans are not the right models for your computer.

Just replaced battery on MBP, and seems that fans run at higher rpm/louder

Hello all;
Tell me that I'm crazy, but I just replaced my MBP battery with a brand new OEM MBP battery and it seems that the fans are running at 4K rpm constantly now. With my just replace old battery, the fans would stay around 2K rpm.
Is this normal? Seems quite annoying. The older battery is ~1 yr old, and had very poor statistics on life and cycles. I accept the fact that I had to replace, but this fan noise is driving me CRAZY!!!

Hi TooManyApples: It may be an activity using too much of the CPU. Check by going to Applications > Utilities > Activity Monitor. Select CPU at the bottom of the page, sort by CPU column, and be sure to select "All Processes" from the drop down list at the top of the page.
Hope this helps
Stedman

Fans running at 0-1500 RPM

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