Fan keeps running continually

I have a 8 core mac pro and my fans kick on right away and keeps running loudly. i installed smc fan control to see the temp. the temp. reading is 79deg.

deluxd wrote:
...the temp. reading is 79deg.
Is that 79ºF or 79ºC? And which Mac Pro do you have?

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I have a new Macbook Air and for the last few days the fan had run continuously, this is the first time it has ever run, and now it won't stop, the fan starts up as soon as I turn it on. The computer is not hot.Any ideas on how I can fix this please ?

I have a new Macbook Air, 6 months old, and for the last few days the fan had run continuously, this is the first time it has ever run, and now it won't stop, the fan starts up as soon as I turn it on and the computer seems to running more slowy.The computer is not hot but I am worried it may burn out,.Any ideas on how I can fix this please ?

Hello dwb,
Here is the screen shot, just the top half, there are another 10 pages, but I guess this should enough for you to have an idea of waht is going on, bit small I am afraid. No, I don't have any apps setup to run when I open my computer, the kernel, varies between 290 and 305 per cent ish.
Would that PRAM thing help ? I think it may be the computer itself, well something inside, as this the first time that the fan has ever started running since I have this computer, even when I have 3 or 4 apps running.
Thank you again for your advice,
Regard,
Beauty of Bath

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.

HT1349 When I start my I Mac desktop the fan keeps running loudly. Can't get it to turn off.

When I start my I Mac desktop the fan keeps running loudly. How do I get it to stop?

Hello there, Jacquefromaz.
The following Knowledge Base article reviews the steps to perform a reset of the System Management Controller (SMC):
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ht3964
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Mac mini fan keeps running!

Today I turn on my mac mini (late 2011) and its fan keeps running... How can I solve it?

Try resetting the SMC
Intel-based Macs: Resetting the System Management Controller (SMC)

Powerbook fan keeps running

Hi,
My Tibook's fan keeps running - battery life is at 40 minutes because of this. I am running OSX 10.4.8. I tried quitting all apps but no use.
Any ideas?
Tnx
Guy

Hit the power button while unplugged at least at one time use to be part of SMC Reset procedure - it gets rewritten every year or so it seems.
Or you could say there was/is a different procedure for each model year.
Some found the culprit was their 3rdd party RAM.

T410 - 252226G slow start, fan keeps running, BIOS config hangs

Windows 7 Prof FP1, 80 GB SSD. 4GB Ram
Some strange unusuall behaviour:
1. It takes up to 45 seconds before the ThinkPad Screen is shown when starting (latest 1.45 bios version)
2. When T410 is closed down using W7 system power off; the fan keeps running until the battery is empty. When de/attaching the charger in this stage the T410 beeps like it's still running
3. When choosing 'config' option in BIOS the T410 hangs
Any clue?

I would do a BIOS reset. If your T410 has no supervisor password, then remove the BIOS battery, leave it out for a couple of minutes and then plug it again.
When the T410 boots, go to the BIOS, press F9 to load the default values, save and re-start.
Hope this helps...
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A31/i1600/G40/R50p/R61i/S30/SL510/2*T22/4*T4x/11*T6x/6*T4x0x/6*T5x0/3*W5x0/W700/3*X2x/4*X3x/3*X4x/5*X6x/3*X6xT/10*X2xx/2*X200T/4*X30x/Z60m/3*Z61x
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I have an MAC OSX 10.6.7 and when I turn it on the fan keeps running. I shut down/turn on and it's the same. Any suggestions? Thanks.

I have an MAC OSX 10.6.7 and when I turn it on the fan keeps running. I shut down/turn on and it's the same. Any suggestions? Thanks.

jean156,
I am a little confused, you are posting in an iMac forum however your profile only indicates you have a MacPro. While I agree a SMC reset may help please carefully read the link The hatter provided because different Mac's have a different processes for resetting the SMC.
In the mean time you may want to update your profile (Your Stuff in upper right and click Profile) and also please post in the correct forum to avoid confusion.

Fan keeps running. Maybe from RAM upgrade?

I recently installed 4G of ram into my computer as the old ram was bad. I didn't notice anything for about 1 1/2 months but all of the sudden my fan keeps running. From what my istat pro says, it ranges from 3000 rpms to over 6000rpms! As you can imagine, this is very annoying. My performance isn't affected but the fan is annoying. I have 4G of 667 MHz DDR2 SDRam. I'm worried about over heating. Could somebody please help me with my fan problem?!

Thanks, I love being able to answer questions and help people

How do I keep my Compaq Presario V6000 fan from running continuously?

I have this old Presario V6000 with a single core processor, 3GB ram, and 160GB HD with integrated graphics. I don't do any gaming or deal with large file manipulation, or any of the other processes that overtax the graphics or the cpu. The fan still runs all the time, and it's not real quiet. Just peeping through the vent holes with a flashlight and looking at the fan, I don't see that much dust or anything that could be hindering air flow. The unit does not get exceedingly hot to the touch. There in no option in Bios that allows toggling of the fan function. It's just loud and annoying.
My question is this: is there a thermostatic fan controller on this thing that could be malfunctioning and not not allowing the fan to turn off below a certain temperature? Is it part off the fan itself?
Short of tearing the laptop down to the mb and doing a thorough cleaning, is my only other option to blow out what I can from the outside of the case. I don't mind taking it apart, it's just time consuming and I could inadvertently mess something else up. Should I replace the fan (and thermostat) while I'm in there? Maybe a better performing fan? Or do I just need to accept that it's an old dog and this is the way old dogs act ?
Thanks for any input. Jim

Hi,
All you should need to do after replacing the HDD is the following.
Start the notebook and open the CD/DVD drive. Insert the first Recovery Disc. Hold down the power button until the notebook shuts down. Press the power button to start the notebook which should now boot from the Recovery Disc and start the recovery process.
Regards,
DP-K
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HT201640 My Mac Becomes very hot easily and fan keeps running even without running any apps

Hi all,
My MacBook Pro Mid 2012 Retina recently get hot easily and the fan just keeps running even with low work load.
For example, right now, I just have Safari opened. (only one webpage opened, which is this) and my keeps running. the laptop gets hot.
If w/o the adapter connected, it can only last 1.5 hrs.
wehen clicked on the battery symbol on the menu bar, under the "Apps Using Significant Energy'" it says Safari.
Even sometimes, I have no apps open, the fan will still be running. and there is no apps using significant energy...........
what is wrong with my mac? I tried System Management Reset couple times, it does not help....
and all my apps/OS are updated! I dont have too many apps (only 30) installed on my mac.
Thanks for any comments/ideas.

Back up all data before proceeding.
Quit Safari if it’s running. Then select
           ▹ Force Quit…
from the menu bar. A small window will open with a list of running applications. Safari may appear in that list, even though you quit it. If so, select it and press return. Close the window.
Step 1
Hold down the option key and select
          Go ▹ Library
from the Finder menu bar. Delete the following items from the Library folder (some may not exist):
          Caches/com.apple.Safari
          Caches/com.apple.Safari.SearchHelper
          Caches/com.apple.SafariServices
          Caches/com.apple.WebKit.PluginProcess
          Caches/com.apple.WebProcess
          Caches/Metadata/Safari
          Preferences/com.apple.WebKit.PluginHost.plist
          Preferences/com.apple.WebKit.PluginProcess.plist
          Saved Application State/com.apple.Safari.savedState
Leave the Library folder open. Try Safari again. If the problem is solved, stop here. Close the Library folder. If you still have a problem, continue.
Step 2
Move the following items from the open Library folder to the Desktop (again, some may not exist):
          Cookies/Cookies.binarycookies
          Internet Plug-Ins
          Preferences/ByHost/com.apple.Safari.*.plist
          Preferences/com.apple.Safari.Extensions.plist
          Preferences/com.apple.Safari.LSSharedFileList.plist
          Preferences/com.apple.Safari.plist
          Preferences/com.apple.WebFoundation.plist
          PubSub/Database
          Safari
          SyncedPreferences/com.apple.Safari.plist
Here, "*" stands for a long string of letters, numbers, and dashes.
Note 1: You are not moving the Safari application. You’re moving a folder named “Safari.”
Note 2: This step will remove your Safari extensions, if any, and their settings. If you choose to reinstall them, do so one at a time, testing each time to make sure you haven’t restored the problem.
Try again. Your settings and bookmarks will be lost. The default set of bookmarks will be restored. Delete them all.
If Safari is now working normally (apart from the lost settings), look inside the “Safari” folder on the Desktop for a file named “Bookmarks.plist”. Select
          File ▹ Import Bookmarks...
from the Safari menu bar. Import from that file. Recreate the rest of your Safari settings. You can then delete the items you moved to the Desktop.
If the issue is still not resolved, quit Safari again and put all the items you moved to the Desktop back where they were, overwriting the newer ones that may have been created in their place. You don’t need to replace the files you deleted in Step 1. Stop here and post again.
If you don’t like the results of the last step, you can undo it completely by quitting Safari and restoring the items you moved or deleted in that step from your backup, overwriting any that were created in their place.

How can I stop the fan from running continuously on my iMac? I have tried resetting the SMC and this did not work.

I have a 27 in. iMac OS X, Version 10.7.5, Intel Core i5 and have a problem with the very loud and annoying fan running continuously. The fan starts up immediately upon powering up and stays on all the time. I have researched this on the internet and have tried resetting the SMC unsuccessfully. Should I try fan control software?

To reset the SMC means to reset the power management settings for your Mac. To do this, follow these simple steps.
1) Shutdown your Mac by going to the Apple Logo in the upper left hand corner of the screen and selecting "Shut Down" from the drop down menu.
2) Turn your machine back on while continuing to hold down the power button.
3) After the initial boot chime, your power indicator light should flash three times.
4) Your screen will remain black and you will hear the boot chime again. At this point, you may release the power button and allow your Mac to boot up normally.
All the best with getting your Mac Mini to run smoothly.

My imac desktop 9.1 the fan keeps running..i have turned off and also pulled power plug but it still runs

the fan on my imac9.1 keeps running..i shut it down and pulled the plug..did not help

The fan minimum speeds are about 1200 rpm, so if the Mac is powered on and not sleeping, they're running.
An iMac's exhaust fans will not run if its power cord is disconnected. If that's what you meant to write, you're hearing something else.

My fan keeps running and never stop

my laptop is dell studio 1458
the system is the latest archlinx x64, and now i am using kde 4.6
the problem is that the fan of my laptop keeps running all the time and never stop.
Is there any solution to this problem?
Thx...

The warning is there so that people realize they need to be aware of the possible outcome if they don't properly check their fans during the setting up of the software.
The guide even suggests to keep a constant watch on the CPU's temperature during testing, and suggests how you can immediately spin up the fans to max in case of a too high temperature:
Second warning: Some of the steps outlined below describe how to tweak fan speeds. Before doing this be sure you have a low cpu load and are comfortable playing around. If at any time during tweaking you notice the CPU temperature start to rise dramatically, do a echo "255" > /sys/class/hwmon/hwmon0/device/pwm1 to spin up the fan all the way until things cool down. Basically, you should know what you're doing before fooling with the configuration file.
Alternatively, there's a fan control deamon called dellfand. A related topic can be found here:
https://bbs.archlinux.org/viewtopic.php?id=54865
Essentially, all these tools do the same. The temperature is polled and the fan speed is adjusted.
As far as I know, there is no alternative way / graphical tool to do this for you.
*edit*
considering this is a dell studio, have you checked the system's bios to see if the automated fan control is enabled?
Last edited by stefanwilkens (2011-04-29 13:03:18)

IMac fan keeps running

Since starting my iMAC last night, the fan keeps runnings on high. I have tried restarting several times, ran a diagnostics which found no faults, and checked the CPU usage which is around 10%. Any ideas what else I can try?

Your post somehow found its way to a low-traffic forum for Apple desktop models other than iMacs made before 2006. I have asked the Hosts to move you to a more active and appropriate forum for your product.
Please add your iMac variant and what version of the Mac OS you are running to get faster help.

Fan keeps running continually

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