Brand new iMac 3.4GHz fan runs all the time - how do I stop it?

Hi, just opened my shiny new imac but the fan runs all the time and very loud! Has anyone any ideas how to fix this or should I return the imac to apple?
I've also noticed that none of my external drive icon show up on the desktop - nor does the imac hardrive icon appear - any ideas?
Thank you in anticipaction.

Try an SMC reset, you may need to do it at least 2x.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

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Laptop fan runs all the time, broker runtime cpu usage after Windows 10 final upgrade

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hockeycanuckjc wrote:
Have all Windows Updates on Windows 10 been applied since installing it? I know there are people weary to update Windows 10 since there have been a few news reports with some people having the infinite reboot loop after installing a particular update For me, yes. All updates applied and automatic updates enabled. This Runtime Broker issue has been there since the upgrade and all updates to this point.

Fan runs all the time after OS X Mavericks installation, how do I turn fan off?

Fan runs all the time after OS X Mavericks installation, how do I turn fan off?

Rest the SMC, do it 2-3 times. Please click Intel iMac SMC and PRAM resets for instructions.

Fan runs all the time after upgrade to 10.4

Upgraded to 10.4 about a week ago and now the fan runs all the time. I lowered the processor to reduced performance because the fan noise was very loud. Doing this lowered the fan speed but did not stop it. Memory usage is not a problem, shows 75% free.
Before 10.4 was using 10.3 fan ran at times but never all the time.
Any ideas.

Tom, have you down loaded an app like "X Resource Graph", I think I got it at VersionTracker, which will tell you what fan is running at high enoug rpm's to generate noise. Plus it will give you cpu usage and temps plus hard drive temps. If its the cpu fan and the cpu is really working, go to the Activity Monitor in the utilities file and see what app is causing the problem. I don't know what to do if it's the hard drive or system fan. My system fan rarely goes over 1800 rpm, my hard drive stays between 2000 and 2200 but my cpu fan will accelerate when its under pressure to to over 3000 rpm. I just start hearing the cpu fan when it gets to 2400 rpm.

Long motor test error did not reach target speed in time. fan runs all the time. sensor is connected. do I have a bad fan? speed in time speed

ran apple hardware diagnostics. fan - master - long motor test error: did not reach target speed in time. fan runs all the time. sensor is connected. do I have a bad fan?

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T61 fan runs all the time on AC, does not when on battery

Hello,
with the lastest BIOS (and those before) my T61's (8889) fan runs all the time when it is AC powered. (After initial start it begins with 0, then ~2500 rpm, then ~3100 rpm and then stays there even if idle).
When on battery under the same circumstances, it doesn't go above ~2500rpm (which is far less noisy then the ~3100rpm level) and often it even stops.
As far as the BIOS settings allow, it is trimmed to max. power saving also when AC powered but still it's getting on my nerves.
Can Lenovo please look into this and make it as quiet as it is on battery also when on AC?
P.S. I cannot see that the temperature levels as reported through ACPI are any higher on AC then on battery, so I don't understand why the fan has to run all the time that loud when on AC.
Thanks,
Daniel

Hi Daniel,
There are two options for you to consider:
1) Better CPU speed management:
- Install a utility called "RMClock" to better manage the CPU (it's a free utility that throttles the CPU to run at different speeds depending on the needs - the CPU speeds increase automatically to full power when required).
- By regulating the CPU speed, the fan will not need to work that often to expell hot air, because the CPU generates much less heat.
- you will find a quick "how-to" for using RMClock --> HERE
2) BIOS thermal management
- You can change the BIOS settings for the "thermal management" (enter BIOS, choose "Config", then "Thermal Management" ) . Change the fan control from "performance" to "battery optimized" under the "plugged-in" option. This will reduce the frequency with which the fan runs, but beware that if your system is plugged in and you're not using any CPU management - meaning that your CPU is running at full speed, then the system will heat up more than you'll be comfortable with!!
I would therefore suggest that you use a CPU throttling management utility (like RMClock mentioned above) together with the thermal management option in your BIOS. This will reduce the frequency with which the fan starts and operates but still keeping the system cool.
A completely different approach is to install and use "Thinkpad Fan Control" -- read this thread ... Be aware that the utility takes a lot of tweaking to get the settings right, but also be aware that you can damage your system if you do not make the right settings!!!
Hope this helps!
Steve
Message Edited by icantux on 07-09-2008 02:18 PM

Fan running all the time - 2011 21.5 inch i5 iMac

I purchased a new 2011 21.5-inch: 2.7GHz i5 on Friday just gone (2 days ago). All was going well with the new toy until this morning (Sunday).
Suddenly the CPU fan was running all the time and at full speed when the computer was not under any real load - very noisy.
I have reset the PRAM and SMC several times now. Within 30 seconds of each reboot the CPU fan reaches 4000 rpm and stays there.
When I run a hardware test I get the following error - Error 4SNS/1/C0000008:TS2p--124. This error is detected under both the quick and extended tests.
I do have to say that I am disappointed that 2 days out of the box it looks like I am return the iMac to the Authorised Reseller.
Can anyone confirm my understanding that:
a) the CPU fan running loud and hard (4000 rpm) when not under load is NOT normal
b) the Error code above relates to the logic board
c) next step is take it back to Apple or the authorized reseller from where it was purchased.
Cheers
Shaun

4SNS/1/C0000008:TS2P--124
When U install the SSD under the optical drive(OD), the air from the OD fan that was supposed to swing under the OD to exit on the uppper vent has no where to go and hence swings across and exits mostly through the vent on the other side near the camera whereon lies a Skin sensor, which blows away/damages tricking the iMac to believe that the CPU is hot and the CPU fan starts to run at full speed of 4000rpm and the Apple hardware shows error 4SNS/1/C0000008:TS2P--124.
This skin sensor will then need to be replaced.
The CPU Fan cannot be controlled by any software.
The only options available are:
1.Change the primary HDD with a SSD.This will result in the HDD fan running at a higher speed as the SSD does not have any moving parts.The HDD fan sensor gets to believe that the HDD is hot since it does not get inputs from the SSD.Once you change to SSD you can use software to control the HDD or the Optical fans.
2.Change the Optical Disk drive with a "SSD in a Optical Drive(OD) Caddy".This will result in the optical drive fan running at a higher speed as the SSD does not have any moving parts.The OD fan sensor gets to believe that the OD is hot since it does not get inputs from the SSD.Once you change to SSD you can use software to control the HDD or the Optical fans.
Do not use the OWC or other dual drive kit that advice U to put a next SSD under the OD, unless ur iMac is under warranty or u have plenty of technical skills & luck.

Does GeForce 7350LE video card fan run all the time or at certain temperatures?

I have a HP Pavilion m8147c Media Center with AMD Atlon 64 X2 Dual Core Processor 5600+ 2.80 GHz 3GB Ram and when running lately the monitor has started to go into sleep mode or something.Sometimes there is a warning that says something like no signal from DVI and one more but doesn't stay on long enough to read it all.I am running Vista Home Premium 32 bit.I had just installed a new game but pretty sure that has nothing to do with it as I used System Restore and backed up to a time before it was installed.At first it was only when playing games but now it happens with hardly anything running.This pc was bought in july 2007 and I have another desktop but I let my wife use one and I use the other.I opened the case and cleaned out all the dust but noticed when I started it up again the fan is not running on the video card.I don't know if it comes on at certain temps or runs all the time but I feel this is the problem.It has been on for about an hour and not come on at all.Any information will be appreciated.
This question was solved.
View Solution.

captna wrote: Thanks Hanspuppa for the help you've given.I have two more questions.Why do I need the NVIDEA drivers when I will be installing a GIGABYTE card,and the Memory Interface on both cards is 64 bit,how does that affect a 32 bit Vista operating system?Just curious as I have never had any dealings with a video/graphics card before and I would think that it should be a 32 bit but since the GeForce 7350LE is also 64 bit it obviously works..I really appreciate the links and I am ordering the card now,thanks again you.For some reason I am not getting email notices when you reply but I am checking back every so often to see.
Hello captna, Usually when you purchase a new video card or other hardware device, the drivers that are included on the CD are an older version, sometimes as much as six months old. The chipset on any Brand of a given model would be either an Nvidia or an AMD ATI.
The chipset is the main component of the video card that controls most of the operations of the video card.
Since all the manufacturers of the Nvidia video cards use the chipset purchased from Nvidia, they are all the same chipset for any particular model. The different manufacturers can and do add or enable features for their particular cards, but the chipset is still the same.
Since the drivers from the manufacturer would be an older version, and Nvidia releases new versions quite often, it would be best to use the Nvidia drivers, since they would have updated fixes and sometimes features, and added support for some newer cards.
Your reference to the Memory Interface on both cards is 64 bit, has nothing to do with your version of the operating system. It just relates to the way, and speed of the interaction of the video card with the system (buss).
The higher the number of the Memory Interface, the more data that can be moved in and out of the video card, which results in a faster video performance. This just becomes important when playing games for the most part.
Using the system just for web surfing, emailing and some light gaming, would not have that much effect on the system.
More important to the system would be the amount of video card onboard memory. The Gigabyte has 1 GB of onboard memory compared to your original video card with 128 MBs of memory. This additional memory would likely show a slight performance increase in any light gaming.
You want see much, if any difference in the performance of your system, with the exception of perhaps the light gaming performance increase, with the new Gigabyte video card over the GeForce 7350LE. You should not experience the heat related issue as you had with the faulty fan on the GeForce 7350LE.
You can go into your personal settings on the Forum and select to not receive the email notices when someone responds to one of your post. Several years ago while on the Dell Community Forum, I would receive over a hundred emails every day until I disabled this feature.
Please click the White Kudos star on the left, to say thanks.
Please mark Accept As Solution if it solves your problem.

My Macbook Late 2008 Fan Running All The Time

Guys my macbook fan keep on running all the time is there any problem with the system? With this im attached my report, please anyone help me.
Love u Guys for a big help!
Hardware Information:
          MacBook (13-inch, Aluminum, Late 2008)
          MacBook - model: MacBook5,1
          1 2.4 GHz Intel Core 2 Duo CPU: 2 cores
          8 GB RAM
Video Information:
          NVIDIA GeForce 9400M - VRAM: 256 MB
System Software:
          OS X 10.9.2 (13C64) - Uptime: 0 days 3:25:6
Disk Information:
          FUJITSU MHZ2250BH FFS G1 disk0 : (250.06 GB)
                    EFI (disk0s1) <not mounted>: 209.7 MB
                    Brainy (disk0s2) / [Startup]: 106.72 GB (14.08 GB free) (Low!)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
                    Bunker (disk0s4) /Volumes/Bunker: 142.34 GB (39.09 GB free)
          HL-DT-ST DVDRW GS21N
USB Information:
          Apple Inc. Built-in iSight
          Apple, Inc. Apple Internal Keyboard / Trackpad
          Apple Computer, Inc. IR Receiver
          Apple Inc. BRCM2046 Hub
                    Apple Inc. Bluetooth USB Host Controller
FireWire Information:
Thunderbolt Information:
Configuration files:
          /etc/hosts - Count: 4
Launch Daemons:
          [System] com.adobe.fpsaud.plist 3rd-Party support link
          [System] com.adobe.SwitchBoard.plist 3rd-Party support link
          [System] com.microsoft.office.licensing.helper.plist 3rd-Party support link
Launch Agents:
          [System] com.adobe.AAM.Updater-1.0.plist 3rd-Party support link
User Launch Agents:
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          [not loaded] com.google.GoogleContactSyncAgent.plist 3rd-Party support link
          [not loaded] com.google.keystone.agent.plist 3rd-Party support link
User Login Items:
          uHD-Agent
          iTunesHelper
          Google Drive
Internet Plug-ins:
          AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 3rd-Party support link
          FlashPlayer-10.6: Version: 12.0.0.77 - SDK 10.6 3rd-Party support link
          Default Browser: Version: 537 - SDK 10.9
          Flash Player: Version: 12.0.0.77 - SDK 10.6 3rd-Party support link
          AdobePDFViewer: Version: 10.1.1 3rd-Party support link
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          Google Earth Web Plug-in: Version: 7.1 3rd-Party support link
          iPhotoPhotocast: Version: 7.0 - SDK 10.7
Safari Extensions:
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Audio Plug-ins:
          BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
          AirPlay: Version: 2.0 - SDK 10.9
          AppleAVBAudio: Version: 203.2 - SDK 10.9
          iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
          Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User Internet Plug-ins:
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3rd Party Preference Panes:
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Old Applications:
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                    /Library/Application Support/Microsoft/MAU2.0/Microsoft AutoUpdate.app
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                    Size of backup disk: Excellent
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               8%          WindowServer
               2%          kextd
               2%          EtreCheck
               1%          hidd
Top Processes by Memory:
          188 MB          mds_stores
          139 MB          Google Chrome
          139 MB          com.apple.IconServicesAgent
          131 MB          softwareupdated
          90 MB          Finder
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the fan always runs, usually you cant hear it. Right now my fan is running at 1996RPM and I would know it was on unless I checked.vv Is is running loud all the time?

Fan Runs All the time and computer is slow!!!

Hello All,
My fan is running all the time, the battery won´t hold it´s charge like in the beginning, it´s a replacement battery, but the computer is starting to act erratically. I think it may be a temperature problem, but am not sure what to do about it.
Help!!!
SEQU

Welcome to the Apple discussions.
First, I would run your Apple hardware test, to ensure the fan is operating correctly. Find the original OS X disc that came with your system that says 'AHT Version x.x' in small print on the label. Insert it, reboot holding the option key down, choose Apple hardware test, click the arrow to the right, follow directions and choose the extended test. You should hear the fan come on as it tests it. Does it give you any error messages? If you have either of the TechTool programs, they can do the same testing.
Assuming the hardware checks out, when you hear the fan go on, bring up your activity monitor, which is on your hard drive in applications/utilities. Do you see any program consistently using 50% or more of the system? That would cause your system to run hot.
Do you have any print jobs which didn't complete normally? OS X can try and complete the job, which can use CPU cycles, and generate heat.
You can download a temperature monitor from http://www.bresink.com/osx/TemperatureMonitor.html if you want to monitor the system temperature.
On your battery, what is the full charge capacity and cycle count? Click the blue apple, about this mac, more info, and Power. Also, how long a charge does it hold?

Fan running all the time on 2010 mba, fan running all the time on 2010 mba

since i have installed osx lion on my 2010 macbook air the fan is running all the time. any ideas why or should i reinstall snow leopard? my mba is 13inch 1.87 with 2gb and 128gb hdd.

If the CPU is running at 100%, that will cause the fans to rev. Try logging into another User account and see what happens there.
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My fan runs all the time on my mac

Help, the fan on my mac is running all the time even when I do not have any applications running.
It will not go off unless I power down the mac.

Have you tried resetting the System Management Controller? That is a good first step for power related issues such as this.
Best of luck.

HT201257 I have an iMac (Mid 2007) upgraded to Lion OS. My fan runs all the time at high speed. I tried the SMT reset without results. I could not try the AHT test because it is not on my computer or install disk. Any suggestions what I can do to correct

I have an iMac (Mid 2007) upgraded to Lion OS. My fan runs at high speed all the time. I reset the SMT without results. I had no way to do the hardware test.
Can I fix this high fan speed?

Open Activity Monitor in the Utilities folder. Select All Processes from the Processes dropdown menu. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time, then select the process and click on the Quit icon in the toolbar. Click on the Force Quit button to kill the process. See if that helps. Be sure to note the name of the runaway process so you can track down the cause of the problem.
If the above doesn't help then create a new user account. Log into the new account. Does this fix the problem?

Pink HP mini 110 fan runs all the time...

Dear HP and community,
Does anyone know if it is normal for the fan in my HP mini to run all of the time? I love my pink little HP mini but the fan running all of the time is rather annoying. I got my HP mini at Best Buy and now they no longer have the HP mini in pink at Best Buy... If this is a mechanical problem, would I have to exchange my computer at Best Buy or would HP be able to help me so that I could exchange it for another pink one? I guess I'm getting ahead of myself! I hope it is an easy fix but am afraid since I've only had my mini for a few weeks....
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You probably should repost this in the notebook hardware forum where you will find other Mini users to compare notes. I have heard that the fan on the Mini comes on frequently, but not as you described (all the time). On the netbook front, I am still using the Asus 1000H, which is whisper quiet BTW.
If your 110 is determined to be faulty, HP will probably choose to repair it if it is still under warranty.

Mega PC 865 Pro - should the fan run all the time?

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I'm sure I read that the CPU fan should not be runniing all the time? The fan runs constantly even when I'm not working at my PC. Is that normal? The box does not feel hot at all and I'm not running the TV card.
It's not that it's noisy but I had hoped it would be silent, like my Pentium M laptop. The fan on that only starts up when the computer is working hard, and then very rarely.
Thanks for a great forum. Imagine relying on MSI!

i don't know about the 865PRO, as i've never used one, or seen one in action
but on the other Megas, the fan usually rotates at a slower speed, until the temp increases under CPU load, then it speeds up to compensate
P4 Prescotts are hot CPUs anyway, and if they aren't installed correctly, they'll run hotter. try removing the heatsink, cleaning off all the old thermal pad, and using a good thermal compound such as Arctic Silver 5. apply a thin layer to the CPU die surface, and then refit the heatsink. make sure no stray cables are blocking airflow to the CPU heatsink fan.

Brand new iMac 3.4GHz fan runs all the time - how do I stop it?

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