Fans constantly running, SMC reset failed to solve it.

My fans currently run on high constantly. I tried the SMC reset (both unpluging the machine and reset button) and the fans are still going. Is there a fan calibration or something else is wrong? I had my Mac tech install more RAM and a week later this happened. Not sure if this is in relation with that.
According to iStat:
Temps
HD 83*
ST3500 88*
ST3500 88*
CPU A 259*
CPU B 259*
Ambient 70*
HD Bay 72*
HD Bay 70*
Fans
Exhaust 2777 RPM
CPU Fan 2813RPM
Power Supply 599RPM
HD/Expansion 2841RPM
Message was edited by: JTA411

That is what iStat was saying. I could have cooked a pizza if it was truly that hot. Fortunately the SMC just needed a reset. Not sure who writes those fix it help pages but disconnecting everything for 15 seconds didn't work. Perhaps they meant 15 minutes?

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My mid-2012 MacBook Pro has the fan constantly running. As soon as I turn it on. My MBP won't even be hot and the fan is running. How can I fix this?

My mid-2012 MacBook Pro has the fan constantly running. As soon as I turn it on. My MBP won't even be hot and the fan is running. How can I fix this?

If you are still under warranty and/or have AppleCare, call them. Let them deal w/it.
OOW try the following: http://support.apple.com/kb/HT1411 Apple Portables: Resetting the System Management Controller (SMC)

Fans CONSTANTLY running after installing Mavericks

So yeah - Fan constantly running after installing Mavericks.
NOT HARDWARE... tell me it is and ill lose my mind... I used to be an Apple Tech.
Erased and REINSTALLED Mountain Lion = RESOLVED
Reinstalled Mavericks = PERSISTS
REINSTALLED Mountain Lion = RESOLVED
--AWAITING OS FIX---
MACBOOK PRO 2009, 750GB HD, 8GB RAM

So yeah - Fan constantly running after installing Mavericks.
NOT HARDWARE... tell me it is and ill lose my mind... I used to be an Apple Tech.
Erased and REINSTALLED Mountain Lion = RESOLVED
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Cooling fans constantly run @ full speed after replacing the upper CPU??

After replacing the upper CPU on a Power Mac G5 (June 2004), Dual 1.8Ghz PowerPC, model M9454LL/A, all the cooling fans constantly run at full speed. All other operations are normal.
I've read, "...after replacing or switching CPU locations the Logic Board doesn't properly recognize the CPU's in their new location and a "Thermal Calibration" is needed". Could a "Thermal Calibration" possibly correct the constant full fan speed issue?
What software would be required?

Hi-
Could a "Thermal Calibration" possibly correct the constant full fan speed issue?
Yes.
What software would be required?
The Apple Service Diagnostic disc (ASD) of the proper version for your machine.
Call an authorized Apple service provider and arrange a calibration, as the disc is not readily available to individuals.

IMac fan keeps running despite resetting the SMC

My iMac fan keeps running loudly even when the computer isn't doing any thing, and I just started it up.
I have tried resetting the SMC and that didn't help.
I also recently had to insert a new hard drive instead of the old one that failed. I am thinking that either the SSD is just hotter than the old hard drive, or that the hard drive sensor is somehow inverted in the plug. Is there any way of testing the hard drive sensor to see if that is faulty, or to test the fan. When I look at the Activity Monitor the system is 87% idle...

Although you don't mention which imac you have since 2009 Apple has used hard drives with the temp sensor built in. When replacing one of these late model drives you have to use the same type hard drive or you get fans running all the time because the temp sensor isn't detected. You might want to try some third party software such as iStat Menus, SMC Fan Control or HDD a Fan Control. Google them for reviews.

IMac fan constantly running, I've tried everything!!

Hi,
I have a Mac (21.5-inch, Mid 2010)
Processor: 3.06 GHz Intel Core i3,
Memory: 4 GB 1333 MHz DDR3,
Graphics: ATI Radeon HD 4670 256 MB,
Running Yosemite 10.10.1
The fan is constantly running quite loud. I have never had this problem until recently and it seems to have started doing it for no apparent reason. I have changed any settings or done anything recently. In fact, the most recent change was upgrading to Yosemite.
I have tried doing a SMC reset (several times) which didn't change anything. I have tried lots of doing different ways of doing a Apple Hardware/Diagnostics Test and it told me that "The Apple Hardware Test is not compatible with this machine".
I have kept a close look at my Activity Monitor and nothing is spiking, average use is: System 2.75%, User 5.67%, Idle 90.4%
Using smcFanControl I know the fan is running at 29C and average 996rpm. I don't know if those stats are normal or not, but my fan is still making more noise than it ever has.
Please, can somebody help! I have been trying for weeks now with no success. I very worried that using my Mac is going to damage something and I desperately need it for work. Can anybody suggest anything outside of taking it to apple because that is my last resort which is going to cost me a lot of money
Thank you in advance for your help

The fans always run, that's normal. What's not normal is that you hear them as much as you do unless you use your imac in an EXTREMELY quiet environment. I think that 996rpm is actually lower than normal, you shouldn't hear that at all. Maybe you have a fan that's starting to fail and is making abnormal noise.
Running the Apple Hardware Test on your mac requires the original gray install discs that came with the computer when it was new, do you have those? AHT is on disc two, insert it and hold D at start up and AHT will start.

Fan constantly runs when the computer is in use, as soon as I turn it on, the fan starts up, help?

Does anyone know what might cause the fan on my mac to run constantly? As soon as I turn it on and the unit is clearly not warm yet, the fan is going.

If your iMac has an Intel processor, reset the SMC:
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
Apple says that should fix a fan that runs regardless of systems load. If that doesn't fix it, please post back.

Fan constantly running loud - iStat reporting 0 rpm

Hi guys,
hope somebody can help me, my iMac suddenly started to make a very loud noise, the fans are spinning at high RPM!
I already tried to reset the SMC, unplugged my Mac for a couple of hours, plugged it in while pressing the power button - unfortunately nothing helped. When starting while holding the power button, it gets even noisier, therefore i expect only one of the fans is running at full or near full speed constantly.
I now tried to install some hardware monitors to check on temperature/fan speed. iStat nano is reporting low temperatures, but the strange thing is that it gives 0 rpm for the CPU fan, even though its clearly running at high revs...
I don't have Apple care and my iMac 24" is now roughly two years old. Any help is highly appreciated!
thanks,
A

Try doing a SMC AND PRAM reset by:
1. Turn off your iMac and unplug everything from it for 30 seconds.
2. Plug in the power cord, keyboard and mouse only.
3. Press the power button and immediately hold down the Option, Command, P & R keys until you hear the second gong then release the keys. Your machine will start up normally, then check for the issues you are having.

IMac Fan constantly running OS X Yosemite Version 10.10.1 (14B25)

Does anyone have this problem my iMac is going to be about a 1 1/2 year old now and the fan is constantly running and never shuts off. This happened from day one took it back to Apple store when first notice the problem which was 1 week later. They told me it was nothing and all iMacs run the fan and do not get to much concern. He did something like unplugging the cord and pressing the power button 2 times holding down for 10 sec each time he said had to reset pram or something like that. It went away for a day and came back tried his procedure and works once or twice and back come on the fan all day. But when in sleep mode goes off. But when on you can feel the air out of back coming out. Is thee anyway to stop it someone told me maybe the motherboard was going or the ram was bad but the Apple tech was I think honest with me he said they have these issue's and there is really nothing to do with the fan noise.The computer is not hot at all to touch and he told me thats when I really have to worry then if it feels hot to touch then shut it down and wait till next day to turn back on. I do not know what to make out with this issue. Anyone know of a fix for this that I can do? There is nothing blocking the computer is wide open only have a cable modem on the side next to printer. I just want piece and quite again thats why I bought a Mac. My pc windows 7 never did this and my laptop never did this either never saw anything like this until I got my very first Mac. Little upset with Apple support they are useless and did not even offer me a new one when I went back a week later they were very rude to me I paid $1299.00 for nosey machine and no help.I am a very frustrated Mac user and thats why I do not own a Apple phone I like Android much better and cheaper than Apple products and from what I have read about the new phone software being so bad even with the updates that another reason I will never have a iPhone. So any help with my fan will be a great help sorry for venting on here.I do apologize for that but need to vent as my fan is driving me nuts. Thank you all

franick01 wrote:
Do you know of any free ones that I can keep that are good?
In a word no. I keep hoping for better low price offerings in the App store, but Marcel Bresink eschews the App Store and the relatively cheap temperature reporting apps I have found there do not report fan speed which in your case, and I suspect many, is critical. Be aware that due to manufacturing tolerances some fans are simply noisier than others.
For what it is worth the fan in my late 2012 Mac mini is currently spinning at around 4,700 RPM and I all I can here is a faint sound of moving air. I get more noise from the fan in my external HD/optical drive enclosure when burning a CD/DVD which of course generates a lot of heat.

Mac Pro 5,1 Fans full throttle, SMC reset does not help

Hello Community,
i have the following issue:
- Mac Pro 5,1
- Latest Firmware; no SMC update available
- Fans (of case, not graphics card) running full throttle as soon as OS X is active (installed or in a installation phase).
- During boot up, fans run at usual speed/silent.
- SMC reset (according to: Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support) does not help the issue, nor did resetting PRAM.
- Removing mainboard battery did not fix it.
- Resetting the battery using the onboard switch did not fix it.
- Detaching components and reattaching them (RAM etc.) did not fix it.
- Detaching device from Power for a prolongued period did not help.
- Apple Hardware Test AHT (off the original installer disk shipped with the device) tells everything is healthy.
- Having clean installed OS X (both:latest releas and also orignal version from original grey installer disks) did not help.
Then: installed MacsFanControl which allows for checking each of the sensors and each of the fans. using them one by one as a control for the fanspeed, which always succeeds: every sensor delivers meaurements, every fan reacts to adjustments of rotational speed.
BUT: As soon as you choose to let the SMC do the job of controlling the fans, fans switch back to full speed again.
All this after having installed VMWare ESX 5.5 on the machine and then having reverted to OS X 10.10.1/2.
Looks highly like SMC won't get properly reset or may some setting is written where SMC reset does not operate?
Any hint would highly be appreciated since i'm not sure whether i should trust this machine which is meant to act as a server.
Best
osxhag

Hello Community,
the above phenomenon turned out to be rooted in s.th. completely different & unrelated.
Obviously there is a system's preference for the 1st PCI-E slot for the RAID controller to be connected to.
You actually may well plug the controller into slot 2 and 3 as well, and the system will then still boot, even after having moved the controller to a different PCI-E slot (after having installed the OS!), but always the SMC will react like described above. Still not sure what the aforementioned symptoms actually indicated (jsut "irritated" SMC or SMC flat out inoperable) - time's too scarce to investiate this any deeper, sorry...
Best
osxhag

MacBook Fans Constantly Running

The fans on my MacBook pro are constantly running. This morning I turned it on and they started up within the first 5-1o minutes of using the machine.
Has anyone else had problems with this? I have two other co-workers who are doing the same amount of activity I'm doing and we have the same exact hardware set up, but they aren't having any problems.
Help!
Thanks!

Have you been monitering Activity Monitor as I suggested to see if an application is causing the problem?
I would also suggest using a utility such as TinkerTool System to erase system, user, and font caches in case the problem is caused by a corrupted cache file. Restart after clearing caches. Also use the utility to run the Unix maintenance scripts. See the following for more on maintenance:
Kappy's Personal Suggestions for OS X Maintenance
For disk repairs use Disk Utility. For situations DU cannot handle the best third-party utilities are: Disk Warrior; DW only fixes problems with the disk directory, but most disk problems are caused by directory corruption; Disk Warrior 4.x is now Intel Mac compatible. TechTool Pro provides additional repair options including file repair and recovery, system diagnostics, and disk defragmentation. TechTool Pro 4.5.1 or higher are Intel Mac compatible; Drive Genius is similar to TechTool Pro in terms of the various repair services provided. Versions 1.5.1 or later are Intel Mac compatible.
OS X performs certain maintenance functions that are scheduled to occur on a daily, weekly, or monthly period. The maintenance scripts run in the early AM only if the computer is turned on 24/7 (no sleep.) If this isn't the case, then an excellent solution is to download and install a shareware utility such as Macaroni, JAW PseudoAnacron, or Anacron that will automate the maintenance activity regardless of whether the computer is turned off or asleep. Dependence upon third-party utilities to run the periodic maintenance scripts had been significantly reduced in Tiger and Leopard.
OS X automatically defrags files less than 20 MBs in size, so unless you have a disk full of very large files there's little need for defragmenting the hard drive. As for virus protection there are few if any such animals affecting OS X. You can protect the computer easily using the freeware Open Source virus protection software ClamXAV. Personally I would avoid most commercial anti-virus software because of their potential for causing problems.
I would also recommend downloading the shareware utility TinkerTool System that you can use for periodic maintenance such as removing old logfiles and archives, clearing caches, etc.
For emergency repairs install the freeware utility Applejack. If you cannot start up in OS X, you may be able to start in single-user mode from which you can run Applejack to do a whole set of repair and maintenance routines from the commandline. Note that presently AppleJack is not compatible with Leopard.
When you install any new system software or updates be sure to repair the hard drive and permissions beforehand. I also recommend booting into safe mode before doing system software updates.
Get an external Firewire drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
1. Retrospect Desktop (Commercial - not yet universal binary)
2. Synchronize! Pro X (Commercial)
3. Synk (Backup, Standard, or Pro)
4. Deja Vu (Shareware)
5. PsynchX 2.1.1 and RsyncX 2.1 (Freeware)
6. Carbon Copy Cloner (Freeware - 3.0 is a Universal Binary)
7. SuperDuper! (Commercial)
8. Data Backup (Commercial)
The following utilities can also be used for backup, but cannot create bootable clones:
1. Backup (requires a .Mac account with Apple both to get the software and to use it.)
2. Toast
3. Impression
4. arRSync
Apple's Backup is a full backup tool capable of also backing up across multiple media such as CD/DVD. However, it cannot create bootable backups. It is primarily an "archiving" utility as are the other two.
Impression and Toast are disk image based backups, only. Particularly useful if you need to backup to CD/DVD across multiple media.
Visit The XLab FAQs and read the FAQs on maintenance, optimization, virus protection, and backup and restore.
Additional suggestions will be found in Mac Maintenance Quick Assist.
Referenced software can be found at www.versiontracker.com and www.macupdate.com.
It also can't hurt to do this:
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger and Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, and 4.1 for Leopard) and/or TechTool Pro (4.6.1 for Leopard) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.

Macbook Pro fans constantly running, Safari hangs up and/or crashes often.

My 2012 Macbook Pro (10.9.2, 2 GHz Intel Core i7, 4 GB Memory) has been acting up a lot lately. The fans are constantly running even if major apps (mail, safari, itunes, messages, etc.) are closed. Safari, in particular, has been hanging up and/or crashing recently for no real apparent reason. My battery has been draining out faster than usual. I've always tried to be very cognizant to the health of my computers and phones and try to limit the amount of apps and files I download, sites I visit, etc. I've already done Verify Disk and Verify Disk Permissions in Disk Utility, reset Safari numerous times, disabled all extensions, removed unnecessary apps, and altered settings in Energy Saver, all to no avail. I'm a grad student so I only use my laptop for Safari and Microsoft Word and put it to sleep when not in use as often as possible. Also, my battery was at 56% about 23 minutes ago and is now at 38%.
Below is a list of the processes using the most memory in Activity Monitor:
kernel_task                                   429.4 MB
Safari Web Content                      127.7 MB
com.apple.IconServicesAgent     122.8 MB
WindowServer                              65.6 MB
mds_stores                                   52.1 MB
Safari                                            43.6 MB
CVMComplier                               34.7MB
Memory Used     3.80 GB
Virtual Memory     4.00GB
App Memory          1.34 GB
File Cache          1.45 GB
Wired Memory     998.4 MB
Compressed          332K
Any insight would be greatly appreciated!
Thanks.

plane928,
have you tried resetting your MacBook Pro’s System Management Controller?

Fan Constantly running after Bios Update

Hello,
I have a Dv6 1245 and after updating my bios to F. 41 A. The fan is constantly running, its not loud or anything, but its constantly on and humming. What should I do?
Thank You

ricwimmer1,
Sometimes things are not interlated. When was the last time you completely cleans the chassis of dust.
Use this guidline to start: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02433041&cc=us&dlc=en&lc=en&product=1841799&tmp...
Upgrade/Service manual: http://h10032.www1.hp.com/ctg/Manual/c00311110.pdf
Be sure to remove the front cover (see Pg3), and clean the dust off the chassis.
I am a volunteer. I am not an HP employee.
To say THANK YOU, press the "thumbs up symbol" to render a KUDO. Please click Accept as Solution, if your problem is solved. You can render both Solution and KUDO.
The Law of Effect states that positive reinforcement increases the probability of a behavior being repeated. (B.F.Skinner). You toss me KUDO and/or Solution, and I perform better.
(2) HP DV7t i7 3160QM 2.3Ghz 8GB
HP m9200t E8400,Win7 Pro 32 bit. 4GB RAM, ASUS 550Ti 2GB, Rosewill 630W. 1T HD SATA 3Gb/s
Custom Asus P8P67, I7-2600k, 16GB RAM, WIN7 Pro 64bit, EVGA GTX660 2GB, 750W OCZ, 1T HD SATA 6Gb/s
Custom Asus P8Z77, I7-3770k, 16GB RAM, WIN7 Pro 64bit, EVGA GTX670 2GB, 750W OCZ, 1T HD SATA 6Gb/s
Both Customs use Rosewill Blackhawk case.
Printer -- HP OfficeJet Pro 8600 Plus

Mac Book Pro fan constantly running

For a couple of days the fan of my (15" late 2011) MacBook Pro has been constantly running and the Mac has become sluggish. The CPU temperature is 156 °F. It seems that the problem would be caused by "coreservicesd" process taking a huge percentage (57%) of the Mac RAM.
What is wrong? Restarting the Mac does not help. Thank you.
I am running OS X 10.9.3 with 8 Go. RAM and 500 Go. HD

When you have the problem, note the exact time: hour, minute, second.
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
☞ Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
Open LaunchPad. Click Utilities, then Console in the icon grid.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above. Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first. Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.

Why does the fan constantly run

my fan on my macbook pro is constantly running today? any answer as to why

Hi Julian,
MBPs run very warm. The fans run to cool the CPU etc. The warmer it gets on the outside, the harder it is to keep the inside cool. There can also be issues causing the MBP to run warmer than usual.

Fans constantly running, SMC reset failed to solve it.

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