Imac (Intel based) fan runs continuously and loudly.

Have done a SMC reset, and the fan is still running loudly and continuously. Only 1 application open - firefox. This has been an ongoing, continuous problem.
Thanks in advance for any help you might offer.

Have had the same problem .. have reset the PRAM & SMC, doubled the amount of RAM. Fans runs & Activity Monitor shows most of RAM is used up with nothing open. Running Snow Leopard 10.6.8 on a Mac Book with 4g of RAM, Apple Support showed no hardware problems. ????

Similar Messages

XServe fans running fast and loud

Good morning
I have searched the information base and tried a few suggestions without success. Hoping for another solution here.
I have an Intel based XServe (2008) (OS 10.6.8) whose fans are running faster (and therefore louder) than they have previously. This follows on the heels of a power outage (two of them actually) here at school, though the server is behind a UPS. The system identifier light is also blinking in a particular pattern - 4 flashes and a pause repeating.
The server is up and running, teachers are connecting to it just fine, the RAID is intact and online, the drives all look good according to Disk Utility. So, functionally, everything looks OK - the fans are just running faster and louder than before - noticibly louder than the other Intel XServe in the rack. The server is at the top of the enclosed rack with a space below it as it has been for the last 4 years.
This summer I took all the XServes out of the rack, opened them up, and blew the dust out of them (including a moth - truly a bug in the system), so the all the airways are clean and clear.
I have tried the suggestions I could find on this forum:
     restarted a bunch of times
     shut down and disconnect everything (including power) for a period of time
     reset the PMU/SMC or whatever it is called doing the front panel buttons with the blue lights on the lower row
     reset the PMU/SMC or whatever it is called by holding down the power button while disconnected from power
I have installed iStat Pro and the temperatures are averaging around mid- to upper- 30°C and the fans are running around 3000 RPM . The temperatures aren't signifcantly different that the other XServe, but the fans are running about twice the speed.
I had to reformat the RAID earlier this weekend and copy over the data files from backup and reassign permissions, but the server was running quietly after that was all finished. It seems to be post-powerbump that the fans became noisy.
Sorry for the long post, but I tried to include all the pertinent information. I would have tossed in photos and videos if I could have!
Any suggestions would be appreciated.
TIA
Greg

Did a little more searching about setting up LOM on the XServe and I think I have it figured out now.
I assigned a unique (different) IP address to Network 1 in the LOM dialogue box in Configure Server menu of Server Monitor since I only have Ethernet 1 enabled and linked to a switch using a unique (different) IP address for network traffic between the XServe and my clients.
I can now see (via Server Monitor remotely) that I have a dead blower in my fan array which, upon closer inspection, is also evident in the iStatPro display (one fan running at 18 RPM). Hence the blinking system identifier light and the other fans running faster and harder (and noisier).
Oddly enough, I have a replacement fan array in a box of XServe spare parts. I now have a weekend task.
Thanks for all the information to be found and the people participating in this forum. Love it.
Greg

Fans Running Fast And Loud With Kona LHe Card Installed?

Hi,
I have a Power Mac G5 Quad, and it makes noise with fan kicking on after it goes to the sleep mode? I took all the 3rd hardware off it, memory, drives and etc. The LHe Kona I have installed and when my quad is put on the "sleep" mode the fans kick on?, but when I move my mouse it stops? Anyone of you guy have this problem?
Thank you Tim C.
I posted this in Power Mac Disscusion too.

Hi
Cool thank for the info, now I know I am not alone, hmmm tried taking out all the hardware added hardware too, made it stop, as I tested each area, drive, memory, Kona card, etc, just going to bite the bullet, dont know what else to do, contacted support, no answers hmmm T.

How do I stop my fan running continuously?

My fan runs continuously and is very noisy. I have reset the SMU but the problem persists.

Hello
first question to ask is , why my fan run continuously ?
try use Apple Hardware Test software to answer , could be a temperature problem , fan problem , temp sensor problem ..
AHT is locate into your original grey CD , try run and report any error may help to understand your problem
AHT could be run to hold on at start up "D" key on keyboard , depend on your imac model / system version
HTH
Pierre

Fan runs continuously on my Powerbook G4

I remember buying my Powerbook G4 Titanium back and then reading the review after I already had the computer at home. The review complained that the Powerbook ran hot.
This has been my experience. I can't hold it in my lap without a pillow to buffer the heat and the power button is hot enough to hurt a little if you hold your finger on it.
The real issue now (I can't remember how long this has been a problem, seems like years) is that I can hear the fan run continuously and it makes a loud whistle. It's distracting enough that I can't take my laptop into a library without disturbing everyone else.
Has this been your experience? I know G4 PBs have run hot from the beginning, but am I stuck with this noisy fan? I don't know if a new fan will be any quieter or what to do with this thing. I'd hate to replace the fan (that can't be cheap) and find that I still deal with the same distracting noise.
By the way, the fan runs right from startup, even before the computer has gotten hot.
-JOHN
ps, By the way, I've opened Activity Monitor and there is nothing using up the %cpu. I'm at about 20% of capacity with two or three apps open.

John_Neumann wrote:
Even if the fan is running continuously, if I get a brand new one installed, I would have a quiet computer again for the year or two that I plan to still own this thing, correct?
Hi John,
No, I suspect that is not correct. The fan is simply a motor. It either runs or it doesn't. If it does, it is functioning properly. If it runs when it is not supposed to, the fan "controller" is not functioning properly. If the fan controller and the fan ARE functioning properly, then the logic board itself is running too hot for some reason, which, in your case, I suspect is the truth.
TiBooks (and some others) have long had heat issues. I have long suspected that it wasn't the actual design, but that some part of the very complicated/integrated physical system had been compromised. In many cases (and possibly yours), I suspect it's a breakdown of either the heat sink itself, or, more likely, the heat paste that "connects" the heat sink to the CPU (and, depending on the laptop, other heat sinks as well); thus, the path which the heat is supposed to take, from CPU (or elsewhere) to the heat sink/and/or fan, is "broken" and the heat cannot dissipate as well as it should. Hence, the fan runs on and on. My .02, fwiw.

17" iMac G5 2GHz (ALS but no iSight) runs hot and LOUD fans

Hi all,
I love my iMac. I've had it for nearly 8 months now. From day 1, I've been surprised by how loud it is under any significant CPU load. Unfortunately for me, I have waited until I'm well out of my phone support window to do anything about it. I have not yet purchased AppleCare.
As I type this, my CPU temp is 70 degrees C and fan is running at 2600 RPM, running nothing beyond the browser in which I'm typing. Should I attempt to work in iMovie and render said work to DVD (the reason I bought the machine), CPU temp will climb to ~76 and fan speed jumps to 4600-4800 RPM. At this speed, the noise is unbearable...but it is annoying even when idle.
Can any of you with this model of 17" iMac comment on your experience? Do these numbers and this experience sound normal? I know I'm not alone in this complaint, but I can't tell how widespread the problem is or whether my machine is normal or defective. I've been told by my local service center (CompUSA) that every single 17" iMac of this revision runs hot and has loud fans, and that there is nothing I can do short of complaining to Apple in the hopes of getting a replacement of a later revision. I was told by a "genius" at a different Apple store that my machine sounded about like he'd expect.
I'm getting a system board replacement tomorrow, but have been told not to expect it to make a significant difference. I figure I must do it before Apple would consider further action.
Any advice at all will be greatly appreciated. Sorry for the long message...
Thanks,
ctcaldwell
iMac G5 17" Mac OS X (10.4.5)

Mine is still fairly new as I picked it up off ebay a couple weeks ago brand new. So I don't know when it was actually manufactured. The part of the noise that gets under my skin is that soft but constant background whining coming from the CPU fan. It doesn't really sound like anything rubbing or a bad bearing, just the sound that an electric motor makes. But, it just seems to resonate from the lower left hand side where the air intake is.
So quite accidentally one day I held my hand under the left hand side and it completely muffled the whine sound. You could still here the hum and the sound of air but the irritating element was gone. Playing around a little more, I opted to tape a business card under that lower left hand corner, bridging the gap from front to back to still allow an airspace for the fan's suction. It knocks out about 90% of the whine.
It's been running that way for two weeks with no ill effects. Yes, the fan speeds up and slows down when needed. Normal at rest RPM is 1500 and mid to upper 50's on the temp. The highest temp I've seen under max continuous load is 65 with the fan at 4000 rpm.
I did experiment with something longer than the business card but I did then see a decrease in cooling capability. The isight models have their suction ducted out the back and I bet that gets rid of that resonance.
So all in all it still makes less fan noise than my old B&W, it's just that the B&W wasn't up on the desk so close to our heads. But, If your fans are constantly on high, there is a procedure for resetting something in power management, I just can't find it right now. Hope this helps.

My iMac g5 starts up , responds slow, freezes after approx. 2 minutes, then upper fan starts running high and loud. ANy ideas on what could be wrong? Worth fixing?

My iMac g5 starts up , responds slow, freezes after approx. 2 minutes, then upper fan starts running high and loud. Any ideas on what could be wrong? Worth fixing?

Could be over-heating. Try cleaning out the air vents.

Fans run continuously on my iMac(1 day old)

I don't know whether anyone might be able to assist, but the fans run continuously on my barnd new 27" iMac.
I have upgarded the HD to 3 TB anf the ram to 12 GB.
I have reset the smc some 4 times.
I do not know what else to do.
Any suggestions are most welcome.

I second Paul_31. If you haven't called Apple by the time you read this, you ought to do it now. You have a brand new machine. Don't try any more "fixes" until you call Apple.
Equally as important, whether they replace the machine of fix the one you have, you really ought to consider purchasing Apple Care. It extends the warranty to 3 years and gives you access to tech support for the additional time period at no cost.

What can I delete from what folders to A) get more space and B) speed up machine. 2009 Imac Intel based Leopard

What can I delete from what folders to A) get more space and B) speed up machine. 2009 Imac Intel based Leopard

If you start deleting things in hidden system folders, or in an /Library folder you may very well mess up something.
That is why I say limit what you delete to your User folder only and only those files you've put or created there. Start messing with anything system or application related without know exactly what you are doing and you risk fubar'ing something.
There are in fact many places in the system areas that will appear to be redundant, but they are not so just because they have similar path or file names.
Also, how much free space do you have with just a freshly rebooted system? If your system does not have much RAM (given the apps your normally run on it), it may be creating quite a bit of swap space. That will be flushed out with a reboot, but if your system is RAM limited, then it will just grow back. In such a case, more RAM would help.
Use Activity Monitor to look at your RAM and swap use over a few days of normal use - look particularly at the page outs, as that will tell you how much virtual memory is actually being used on the drive. If page outs are high (thousands to 10's of thousands or more) your system is RAM limited, and your drive will be filling up with swap files.

Whenever I run Firfox 4.0, my computer fan runs continuously. I have disabled all plug-ins, and I get the same result. This did not happen with Firefox 3.x, and it doesn't happen with IE 8.0. Any ideas?

Whenever I run Firfox 4.0, my computer fan runs continuously. I have disabled all Firefox plug-ins, but I get the same result. This did not happen with Firefox 3.x, and it doesn't happen with IE 8.0. Any ideas?

I have had a similar problem with my system. I just recently (within a week of this post) built a brand new desktop. I installed Windows 7 64-bit Home and had a clean install, no problems. Using IE downloaded an anti-virus program, and then, because it was the latest version, downloaded and installed Firefox 4.0. As I began to search the internet for other programs to install after about maybe 10-15 minutes my computer crashes. Blank screen (yet monitor was still receiving a signal from computer) and completely frozen (couldn't even change the caps and num lock on keyboard). I thought I perhaps forgot to reboot after an update so I did a manual reboot and it started up fine.
When ever I got on the internet (still using firefox) it would crash after anywhere between 5-15 minutes. Since I've had good experience with FF in the past I thought it must be either the drivers or a hardware problem. So in-between crashes I updated all the drivers. Still had the same problem. Took the computer to a friend who knows more about computers than I do, made sure all the drivers were updated, same problem. We thought that it might be a hardware problem (bad video card, chipset, overheating issues, etc.), but after my friend played around with my computer for a day he found that when he didn't start FF at all it worked fine, even after watching a movie, or going through a playlist on Youtube.
At the time of this posting I'm going to try to uninstall FF 4.0 and download and install FF 3.6.16 which is currently on my laptop and works like a dream. Hopefully that will do the trick, because I love using FF and would hate to have to switch to another browser. Hopefully Mozilla will work out the kinks with FF 4 so I can continue to use it.
I apologize for the lengthy post. Any feedback would be appreciated, but is not necessary. I will try and post back after I try FF 3.16.6.

HT3964 I did the SMC reset for my iMac intel-based and now it won't turn on. What can I do to fix this?

I did the SMC reset for my iMac intel-based and now it won't turn on. What can I do to fix this?

Well, first things first... is the power cord fully plugged into the back of the iMac (and the wall, for that matter)?
Make sure the wall outlet has power, too... I've scratched my head over stupid issues where I forgot to flip a wall switch.
If the outlet does have power, then try doing a pram zap. Command + option + P + R (hold those at startup).
If the machine is receiving power, you should be able to see some LEDs if you look through the bottom grate of the machine to the left of the RAM door.

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.

Pb runs hot and loud., doesn't sleep.

I just sent my pb into apple to replace the combo drive (thanks applecare!) and when I got it back, I noticed that its been running hot and loud. The upper-left portion of the keyboard is quite warm, and the fan seems to be constantly running. Even if I walk away for 15 or 20 minutes, I'll come back to it still on. When I manually put the computer to sleep, the fan turns off and screen goes blank. After a a few seconds, the drive makes a noise like its ejecting a disc, the screen comes back on, and the fan starts up again.
I'm going to call Apple about it, but I just wanted to know if anyone had any similiar problems or ideas about what might be going on?

Mine is still fairly new as I picked it up off ebay a couple weeks ago brand new. So I don't know when it was actually manufactured. The part of the noise that gets under my skin is that soft but constant background whining coming from the CPU fan. It doesn't really sound like anything rubbing or a bad bearing, just the sound that an electric motor makes. But, it just seems to resonate from the lower left hand side where the air intake is.
So quite accidentally one day I held my hand under the left hand side and it completely muffled the whine sound. You could still here the hum and the sound of air but the irritating element was gone. Playing around a little more, I opted to tape a business card under that lower left hand corner, bridging the gap from front to back to still allow an airspace for the fan's suction. It knocks out about 90% of the whine.
It's been running that way for two weeks with no ill effects. Yes, the fan speeds up and slows down when needed. Normal at rest RPM is 1500 and mid to upper 50's on the temp. The highest temp I've seen under max continuous load is 65 with the fan at 4000 rpm.
I did experiment with something longer than the business card but I did then see a decrease in cooling capability. The isight models have their suction ducted out the back and I bet that gets rid of that resonance.
So all in all it still makes less fan noise than my old B&W, it's just that the B&W wasn't up on the desk so close to our heads. But, If your fans are constantly on high, there is a procedure for resetting something in power management, I just can't find it right now. Hope this helps.

Macbook Pro fan running constantly and CPU running slow

So, I have a Macbook Pro 2010 2.3 i7 that has started running really slow and the fan is running constantly.
In activity monitor it shows a kernel_task running constantly at around or above 200%.
I have tried all the regular tasks. PRam reset, SMC reset and nothing seems to fix it.
I have also tried a system reinstall to no avail.
Maybe I'm on the wrong track, but from what I have read, the kernel_task might be trying to slow my CPU down because it thinks it is being overworked?
Maybe the fans are also being activated because it thinks the computer is too hot?
Anyway, if anyone has any idea as to what I can do to figure out what is going on, let me know. Thanks

Here is the EtreCheck results:
Problem description:
fans running constantly and CPU slowing down
EtreCheck version: 2.2 (132)
Report generated 4/28/15 7:42 AM
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
The following internal tasks failed to complete:
/usr/sbin/system_profiler -xml SPFontsDataType
Hardware Information: ℹ️
    MacBook Pro (15-inch, Mid 2010) (Technical Specifications)
    MacBook Pro - model: MacBookPro6,2
    1 2.66 GHz Intel Core i7 CPU: 2-core
    8 GB RAM
        BANK 0/DIMM0
            4 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            4 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery: Health = Normal - Cycle count = 141 - SN = W0020PTD7BWZA
Video Information: ℹ️
    Intel HD Graphics - VRAM: 288 MB
    NVIDIA GeForce GT 330M - VRAM: 512 MB
        Color LCD 1440 x 900
System Software: ℹ️
    OS X 10.8.5 (12F45) - Time since boot: 0:39:23
Disk Information: ℹ️
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        disk0s1 (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 499.25 GB (73.74 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
    MATSHITADVD-R   UJ-898
USB Information: ℹ️
    Apple Internal Memory Card Reader
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Computer, Inc. IR Receiver
Gatekeeper: ℹ️
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Startup Items: ℹ️
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    Startup items are obsolete in OS X Yosemite
Launch Agents: ℹ️
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Internet Plug-ins: ℹ️
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    /sbin excluded from backup!
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Diagnostics Information: ℹ️
    Apr 28, 2015, 06:53:27 AM    Self test - passed
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    Apr 27, 2015, 11:34:23 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/Pro Tools_2015-04-27-113423_[redacted].crash

Unable to achieve Gigabit speeds with onboard NIC (iMAC Intel based)

Hi,
I've recently noticed that my iMAC's built in 10/100/1000 NIC is only negotiating up to 100mb. I have a direct (cat5e straight through) connection from the iMAC to a 10/100/1000 port on an Airport Extreme Base station.
I've tried several different (known good) straight through ethernet cables and I either get NO link or at most 100mb. I'm starting to think that the NIC might be flaky of failing because during a few tests with different cables, I got link after a very long delay. Close to a minute or more after plugging in the cable.
Before I call Apple tech support, I figured I'd check the forum to see if this is a known issue or if anyone else has seen this.
- Some more specs of my system....
20" iMAC (Intel based)
3 gig DRAM
OS 10.5.2
Thanks...

I'm seeing (within the Network Utility) when I select the onboard ethernet adapter that the speed is 100mb.
I've been trusting this output mainly because if I leave the Network Utility screen open and unplug or re-plug the cable back in, the speed <value> disappears and then re-appears once the speed (I'm assuming) has been negotiated.
Additionally, I've just checked the Network Utility on my Powerbook G4 (here at work), and it shows the wired ethernet speed to be (1G) as opposed to (100mb). I can think of no logical reason why my iMAC's ethernet port would be negotiating to 100mb unless either the NIC is truly flaky or the AEBS needs to somehow be configured accordingly.
Thanks. Let me know if you have any other thoughts..

Imac (Intel based) fan runs continuously and loudly.

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