The fan runs almost constantly but is not hot

My macbook pro is making a fan-funning sound almost constantly, even when the computer is not hot. I have tried shutting down and restarting, to no avail. Any suggestions?
Thanks.

As leroydouglas mentioned, the fans are always running, the idle speed is about 2000 rpm, if your fans are running at high speed when the machine is not working hard you can try a Systwm Management Control reset:
http://support.apple.com/kb/HT3964
Follow direstions for a battery you should not remove yourself

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HP Pavilion dv6 2122eo fan running almost constantly

On my now 12 month old HP dv5 2122eo running windows 7 64-bit home edition, the fan runs almost constantly, and has done so since purchase, even without any load on the pc.
Installed programme Core Temp to see temperatures, and the fan runs even at a temp. of 41C. Bios has a function to disable fan from running all the time, but even after disabling this in Bios, the fan still runs almost constantly. Would be grateful for any help/suggestions. This seems to be a problem for this pc when searching for solutions on the Web.

Andrew,
You can't control the fan speed/function directly on HP laptops. If you haven't updated the BIOS then try that. Also, here's some other stuff to try.
-wes
I am an HP employee.

17" MacBook Pro fan runs almost constantly

Fan runs way more than it use to and the screen becomes pixalated when waking up from screen saver or switching between desktops. The fan seems to run when searching the internet. Is the video card going out possibly?

mamberson wrote:
Is the video card going out possibly?
Very real possibility.
The fan seems to run when searching the internet.
Try a SMC reset:
http://support.apple.com/kb/ht3964
If there is no change, run an Apple Hardware Test:
http://support.apple.com/kb/ht1509
Post back with the results.
Ciao.

Fan runs almost constantly-why?

So my macbook is about 2.5 years old, going on 3. I will admit that I don’t turn off my computer that much. I just close it for the night. However, my fan is been going kind of crazy for a while now. It’s okay for the first little bit it’s open, but then if I open certain websites or watch videos my fan goes at full speed and then won’t stop.
Is there anything I can do? Or do I need to take it to an Apple store?
thanks.

https://discussions.apple.com/message/15022489#15022489
Another thing to do is to open activity monitor and sort the items by the amount of cpu that they use. If an application is using too much, you can quit it. If it only runs when you use safari, reset it.

My Powerbook will not power up, but I can hear the fan running...

Please help!! My Powerbook will not power up, but I can hear the fan running when I press the power button to attempt to power it up. I just received a new power adapter because it wasn't working properly and it was doing this before and then it worked for a week and now it will not power up at all. It just starts the fan but nothing else turns on. When I plug the adapter, with the battery still connected, it will look as if it is charging but then the light on the plug turns from green to orange then off and doesn't power up at all. If I take the battery out and plug in the adapter, the light stays on but it does not power up except for the fan noise. Does anyone have any suggestions? I also followed the two articles listed online in regards to resetting the power setting and the command + alt + P + R as well. Nothing works. Thanks in advance.....

Same here. If I start up with the power adapter attached, it starts up fine. If I try to start up from battery only, the fan comes on, the sleep light comes on but nothing else happens. I tried letting it sit that way for about 15 minutes and nothing changed. I tried attaching the power cord while in this mode and nothing changed. I tried the PMU reset a couple of times but nothing helps.
This computer is just over 1 year old and I have not had any problems with the power cord (3rd party), the battery, or any problem like this before. It started after a proper shutdown last night and attempt to start without the power cord this afternoon.
Any answers to this yet? I think I'll call on this and report any success to this discussion.
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TS1587 I tried everything, except for reinstalling the SO-DIMM memory modules. Still, my iMac will not wake up. Turning it on you can hear the fan run, but the display stays dark. Any ideas what to do? Thanks Maja

My iMac won't start up, or wake from sleep. I've tried everything, except for reinstalling the SO-DIMM memory modules. Still, my iMac will not wake up. Turning it on, you can hear the fan run, but the display stays dark. Any ideas what to do? Thanks!

Mac doesn't boot
Can you hear the fans and hard drive and see the white boot screen? Flashing question mark? The circle just runs and nothing happens? Only black screen and nothing else? These can be very helpful to diagnose the source of the problem. [1]
Flashing question mark [2]: This is usually a sign of a failed hard drive. This indicates that boot up volume can not be found.
Black screen: This is usually a sign of a failed logic board. There is no single reason for this and this may be caused by failed GPU, screen, CPU or RAM.
Circle of death/no circle/blue screen: This is usually a sign of a hard drive failure. This may NOT be a dead hard drive, just broken permissions or something
Gray screen/Apple logo/spinning gear or globe/prohibitory sign/folder with flashing question mark [3]: This could be a sign of faulty hardware but more likely a software issue, i.e. broken permissions, failed software update, etc.
[edit]
What to do
First, hold down the option key (also known as the alt key) just after you've pressed the power button. This should show all the available options to boot from, so if you have Windows installed through Bootcamp or a disk in your SuperDrive, you should be able to see them along with your OS X drive/partition. Select the OS X partition with arrow keys and press enter. Startup key combinations
If that doesn't help continue doing the steps from below:
1. SMC reset [4]. Shut down and unplug all cables including power cord for at least 30 seconds and then plug in power cord and keyboard/mouse.
2. PRAM reset [5]. Hold down option, command, P and R while booting. Start it when you hear the sound and don't let go before it reboots.
3. Safe boot [6]. Hold down shift while booting to boot into safe mode. If this works, open Disk Utility from Utilities and repair your permissions and verify the disk
4. Hardware test [7]. Insert the install disk (disk 1 in Mac which shipped with OS X 10.5.4 or earlier, disk 2 if shipped with OS X 10.5.5 or newer) and hold down "D" before the grey boot screen opens. Follow on screen instructions
5. Boot from install disk. Boot from the disk that came with your Mac. Hold C while booting. Select Disk Utility from top bar and repair permissions and verify the disk. Reboot normally and see if it works now.
6. Boot from another Mac (Firewire target disk mode). Connect the machines with a Firewire cable. Power on your Mac and press T. Select the other Mac's hard drive. Download the current OS X combo update. Run the combo update installer and select the drive that won't boot as the destination.
7. "Repair" OS X. Boot from the install disk as in point 5. and reinstall OS X. This should NOT erase any data, just replaces the system files which may have caused your booting problem. Now install the latest combo update for OS X and repair permissions on your drive with Disk Utility.
7.1. Install OS X into an external hard drive and then boot from it [8] and try to copy your data from the hard drive before proceeding. If you have done a backup recently, you don't have to do this.
8. Restore OS X from Time Machine backup. Boot from the disk that came with your Mac and choose the Time Machine restore option. This step will lose any changes made since your last backup but the system and your data will be put back to exactly as it was on that date.
8.1 Reinstall OS X. Boot from the install disk as in point 5. and select Disk Utility again. Now erase the whole hard drive and install OS X again. If you had a Time Machine backup and step 7 worked you don't have to do this.

Whenever I close my laptop then open it it does not turn back on, the screen stays off but I will hear the fan running. I then have to physically press the power button for it to turn on. Help!

Whenever I close my laptop then open it it does not turn back on, the screen stays off but I will hear the fan running. I then have to physically press the power button for it to turn on. Help!

Try here. iPhone and iPod touch: Frozen and unresponsive

Athough there is not much usages in the CPU , but the Fan runs really hard and loud , and i've ready try to reset the SMC ! i don't know what to do !

Athough there is not much usages in the CPU , but the Fan runs really hard and loud , and i've ready try to reset the SMC ! i don't know what to do and i'm very worried.

Nguyen Phuc wrote:
Athough there is not much usages in the CPU , but the Fan runs really hard and loud , and i've ready try to reset the SMC ! i don't know what to do and i'm very worried.
I suspect you didn't reset it right.
Turn off the machine, let it charge up and then try the SMC reset again.
https://support.apple.com/kb/HT3964
Run a Hardware Test
https://support.apple.com/kb/ht1509

New MBP seems to run hot & fan runs almost all the time

I've had my MBP for just about a week now. It's the new, 15", 2.2 GHz model. It's great, but I notice that it runs hotter than my Powerbook G4 did and the fan is almost always on. It's presently sitting on a wooden topped table. My house is not AC-ed, but the air temp is about 70 F/21 C today. Seems to run hot in my AC-ed faculty office too, when I am there. What is "normal" for this machine. TIA.

David,
Ditto what Ned says. To be sure, 80 C is not too hot (it is the temp that the MBP is designed to maintain as a working maximum), but that you are experiencing this temp at all times indicates that something is pushing the processor at all times.
That is not normal. As has been suggested, have a look at Activity Monitor. If you are not doing anything of any consequence at the time, your CPU usage should be very, very low, and processes that you see using CPU intermittently (there will be many of these processes) should only use a small percentage when they use any at all.
Scott

The Power Supply Fan is still working, but does not appear to respond to increased loads, and its speed cannot be increased using SMCFanControl. Any suggestions?

Hi all - My mac pro 1,1 has an enigmatic problem. It's quad-core, 3Ghz, running OS X 10.7.5. The problem began some months back, when running HD video conferences, HD streaming videos and some other graphics-moderate (I won't say intense) uses, such as slide shows in Just Looking. My machine has an ATY, RadeonX1900 card and 2 monitors - both Apple displays, one being 30 inch 2560x1600, the other being 24 inch 1920x1200.
When I start those types of graphics-moderate apps, after about 5 minutes, something would crash (the monitors making a noise as it did) and the displays would both go black. The power did not appear to be fully cut off from the monitors. I think that the underlying applications, however, did not crash. So, I could still hear and speak to people during video conferences, and I could hear the sound tracks of videos.
Attempts to restart the computer and get the monitors back did not immediately work to undo the problem, if done straight away. The only way to correct the problem (so as to have the monitors work) was to wait for a few minutes and then restart.
After a lot of puzzled looking at console logs (and I confess that I am not an expert), I ran into a blank.
But, because of the timing of the crashes (after ~5minutes use) and restarts (after some minutes wait), I reasoned that the problem might be temperature related.
Once on that path of thought, I found this article:
http://worldtv.com/blog/guides_tutorials/fixing_an_overheating_mac_pro_no_expens e_required.php
I installed both Temperature Monitor and SMCFanControl. And I experimented, and got interesting results:
Now to the puzzling bit: SMCFanControl shows that the speed of the Power Supply Fan doesn't vary much, even if I use SMCFanControl to ramp fan speeds right up. All of the other fans react to SMCFanControl, going up to and above 2500rpm when commanded. But the Power Supply Fan does not. Having watched it for a few days now, the Power Supply Fan, according to AFCFanControl, never varies outside of a range from about 600-640 rpm, regardless of what I do with AFCFanControl.
Also (and not surprisingly), whenever the graphics-moderate apps run, when I ramp all the fan speeds up using SMCFanControl, Temperature Monitor shows that the all of the temperatures within the machine plummet, except in the power supply locations. Power Supply Location 2 is the worst affected. Because the Power Supply Fan does not react as the other fans do, the "crashes" still occur.
I could post some screen shots of the read outs of SMCFanControl and Temperature Monitor, although I think I have covered the key points in this post.
It seems that the Power Supply Fan is still working, but does not respond to increased loads.
Instinctively, I'm worried that if that's right, it might be a hard problem to fix. Any suggestions? Help! I would really appreciate them!
Cheers
P

Thanks for your response Grant. I had already read about, and I think excluded, dust in graphics card/fan/assembly as a cause. The entire inside of the computer, including the graphics card/fan/assembly, is as clean as a whistle. It looks clean. I've cleaned the dust out every now and then (including a few days ago). Also, my undersanding (derived from the article, linked in my first post) is that I might expect to see high temperatures in the Northbridge and memory module B if the graphics card was overheating. According to Temperature Monitor, however, locations do not increase in temperature when I run the relevant apps. Finally, the graphics card/assembly does not feel too hot to touch.
It is strange that SMCFanControl lists the Power Supply Fan as being software controllable, if that fan is not. Still, your comments are consistent with my observations, as the fan simply does not respond to software control.
There are two upsides: First, I've something of a work-around. I've worked out what temperature must be achieved in Power Supply Location 2 for a crash to occur, and I can watch that location in Temperature Monitor, terminating the process before that treshold is reached. Of course, that's not ideal. Second, ramping all the other fans up does significantly delay the onset of the problem, and makes recovery time much quicker.
Is there any donwside to peridically ramping up the other fans when running the relevant apps? Given that it causes all of the other locations to cool significantly, could this lessesn the life expecancy of the mahcine? (I don't want to run the fans up all the time - that's like sitting next to a jet ready for take off!)
Also, a correction to my first post: Yesterday, with all the other fans running on full and running an HD streaming video, the Power Supply Fan did, eventually, slowly, come up to ~740rpm, which is much higher than the ~640rpm maximum I had previously seen, and this may have aided delaying the onset of the problem.
I'm not sure where this leaves me? The problem might now be able managed. Well, sort-of. But it's not eliminated.

MMacBook Pro (13-inch, Mid 2010) switches on but internal display remains off/black .There is no start-up sound and the fan starts off normal but after about Five minutes begins to run even faster

Hi ,
My MacBook Pro (13-inch, Mid 2010) switches on but internal display remains off/black .There is no start-up sound and the fan starts off normal but after about Five minutes begins to run even faster as if the machine is running a heavy load.It displayed a question mark some time back then a friend borrwed it ,he flashed the system and put windows 7.Then a few days pasted and now it wont display as stated.I have tried to Reset SMC and the Command + P + R + Power but still no response.Please assist?
Regrads Josh

I think your "friend" caused a problem (or two).
I do not know what "flashed the system" means......
Based on what was done, I would probably erase the HD and restore the system from a backup before the software changes were made.
Barry

Graphic issue but goes away if I keep the fans running

So I have a graphics problem where I end up with lines covering the screen and screwed up video, however I am now certain this is due to overheating however I am not able to get new thermal paste for a week or two because of shipping. I am asking you if there is a way to keep the fans running at maximum output as when I have booted up the mac from a firewire drive, the graphic issues go away, but as soon as the fans start to die down it comes back within seconds.
Thanks

The graphics issue may well not be lack of thermal paste, but a failing logic board. Have you run Apple Hardware Test or Disk Utility
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk.

Help apple help me, at first I was new to iphone registration 1 apple ID account but because I hardly use icloud account. so I do not remember the password and login name, my computer crash when I decided to run the software on ios7.1, but do not expect m

help apple help me, at first I was new to iphone registration 1 apple ID account but because I hardly use icloud account. so I do not remember the password and login name, my computer crash when I decided to run the software on ios7.1, but do not expect me to be locked iclou account, I hope this mail unlocked apple for my apple account. I'm currently using the machine iphone 5, IME: ********. thank you ... ask yourself? machine is in warranty period warranty icloud error not send mail to me at mail
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Contact iTunes Customer Service and request assistance
Use this Link > Apple Support iTunes Store Contact

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I had the same problem and it was because of my firewall settings, which I had set to block all activity and forgot to reset it.

After installing Lion , my computer crashes and the fan runs constantly on high

After installing Lion , my computer crashes and the fan runs constantly on high. How is Apple resolving this problem?

Try to reset your SMC, it fixed the same problem for me ;o)
http://support.apple.com/kb/ht3964

The fan runs almost constantly but is not hot

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