Loud fan and overheating issue.

I bought a secondhand macbook about 8 months ago, and recently the fan has started making a god awful noise, and it stops and starts every now and then, and my laptop is heating up. Is this a hardware problem? and will it be expensive to fix?

1) Thermal sensor issue
2) Fan issue
Try an SMC reset. See if this helps.
Resetting the System Management Controller (SMC)

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IMac 27" (Late 2012) Loud Fan and Overheating Issues, causing Hard Drive Failure

Hi all,
I'm having some serious overheating issues with my new iMac. Any help to help me solve this problem would be gladly appreciated since it's really beginning to bug me. Here's what's has happened:
I noticed in the first few hours of switching the iMac on that there was a short burst of very loud fan noise. This has been happening about once every two days since and every time I haven't been doing any heavy processing with the system. I've noticed that the main fan will spin, on average, at 1200rpm. Is that normal? The iMac is very well ventilated and sits right next to a window...
I have also boot camped the iMac with a copy of Windows 8 so I could run some fairly power-hungry games. I intentionally purchased a high end iMac (27" display, Intel Core i7 3.4GHz, Nvidia GeForce 680MX Graphics, 1TB Fusion drive) and expected the iMac to run games flawlessly. However, after a few days, I noticed that the CPU and GPU had shot up to a worrying 80°C whenever I ran power-hungry games, with a very loud hissing noise from the fan. After running games for about 10 minutes, the fan will stop hissing, causing the GPU and CPU to increase to 100°C. The iMac then fails and switches off unexpectedly without any warning. After analysing the Windows event logs, I received an event ID 41: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
As this occurred about six times whilst I was testing my iMac's performance, I think my hard drive has now begun to fail - sometimes I will hear the hard drive make a click noise, about once every 5 seconds. Sometimes, the clicking noise causes OS X and Windows to run very slowly (even though minimal RAM is being used and nothing too intensive (Safari, Mail etc.) is being processed). Running Repair Disk and Repair Disk Permissions under OS X's recovery mode as well as a repair in chkdsk in Windows suggests that there were no problems with the hard drive. All I can do is wait a while for the clicking noise to stop, and then performance will increase. I have backed up everything externally.
I have also performed a reset of the SMC as well as the PRAM, which hasn't really helped.
Any help will be appreciated. I will gladly provide any extra logs etc. if they're needed.
Thanks so much,
Alex.

Alex Cummaudo wrote:
I've noticed that the main fan will spin, on average, at 1200rpm. Is that normal? The iMac is very well ventilated and sits right next to a window...
That's the default fan speed on iMacs, so there isn't any problem with this.
Alex Cummaudo wrote:
I have also boot camped the iMac with a copy of Windows 8 so I could run some fairly power-hungry games. I intentionally purchased a high end iMac (27" display, Intel Core i7 3.4GHz, Nvidia GeForce 680MX Graphics, 1TB Fusion drive) and expected the iMac to run games flawlessly. However, after a few days, I noticed that the CPU and GPU had shot up to a worrying 80°C whenever I ran power-hungry games, with a very loud hissing noise from the fan. After running games for about 10 minutes, the fan will stop hissing, causing the GPU and CPU to increase to 100°C. The iMac then fails and switches off unexpectedly without any warning. After analysing the Windows event logs, I received an event ID 41: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
You must know that Boot Camp isn't compatible with Windows 8 and that Apple hasn't released drivers for Windows 8, so it can fail. Install Windows 7 inmediately until Apple launches updated drivers.
As it looks like the hard disk is damaged, I would take the Mac to an Apple Store. It's in warranty, so it should be repaired for free or you should receive a new one

Fan noise/overheating issue? I have a late 2008, 15'' MBP and I'm having a lot of fan noise while just running safari. I don't think this is normal but perhaps it is? Thanks for any and all help!

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Runaway applications can increase fan activity

My macbook pro i7 (2011 version) has a loud fan and high cpu % when I have Skype on or when I am on Safari. Help please!

My macbook pro i7 (2011 version) has a loud fan and a high cpu % when I have Skype on or when I am on Safari. My laptop would sometimes freeze for a while and it is usually hot. Has anyone else encounter this problem and know how to fix it? Thanks!

Skype is a very resource intensive activity...it has been reported on here users are seeing cpu temperatures on the order of 80-85 °C, within the limits of the cpu, but still hot to the touch.
Make sure nothing else is running so you keep the thermal load down.

Lenovo B310 (core i3-550) - loud fan and disk noise

I got my B310 delivered today and happy with overall look and feel. Just after few our of running, can hear loud noise.
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hey rituvineet,
welcome to the forums and since this unit was recently delivered, i suggest getting in contact with our support team via
http://bit.ly/LNVsuppNum
at the same time, head over to >> http://consumersupport.lenovo.com/us/en/DriversDownloads/drivers_list.aspx?CategoryID=505977
update your drivers and see if it resolves your issue.
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BIOS Update and Overheating Issue

A big Hello to all my fellow HP Users and a very Good Day to all of you
I have an HP G61-455EE Notebook PC running a Windows 7 ( 64 bit ) OS with an overheating issue - the underside of the laptop runs really hot after a while of usage and the system goes into "Hibernation" with a displayed message due to overheating.
Pursuant to my research on this subject, I have come across advice to clean the fan ducts ( which I did ) and to update my BIOS, and that is where the problem lies.
My BIOS current information : HP F.23, 12/21/2010 and the HP Driver Download lists a new update F.23 ; Released: 2011-01-14. Upon download and subsequent installation with the "insydeflash" program that pops up during BIOS instalation, the current and the new version are shown to be the same and despite procedding with the installation, it still shows the same old version.
I would love all your help and advise on this, as to what I should or should I just go ahead and replace the fan ( Is that even adviseable ? )
Looking forward to your help
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F.23 is F.23 despite the discrepancy in the release dates. You have the latest BIOS.

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I have the late 2011 model Macbook Pro 13''. The problem started out with just a loud fan, the computer started to operate really slowly and just yesterday I started to hear loud metal rattling on the inside. At first it was just when I turned the computer but now it will do it periodically while it's sitting completely still while running. It also is heating up a lot. I've already gone to Activity Monitor and killed all activities using too much CPU and the fan doesn't stop.

I have the same model and accidentally dropped mine off my bed today.
I looked around for a while to see what the noise could have been and found this
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Loud fan and beep sound

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Remove the side panel from the case, and look for the heatsink & Cooler for the CPU. Make sure there isn't a wire stuck in the fan and make sure the CPU fan's power cord has not come unplugged from the mobo.
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Today my Macbook has suddenly begun to act slow and the fans are running quite loud. I read online that I should try checking the activity moniter, and I did this, and a program is currently taking a large portion of my CPU. However, I am unable to quit it and I'm sure it is the problem. In one of the description fields it is lableled "root" and says "kernel_task". Someone please help me out!

Actually I'm still running snow leopard. But this problem is confusing me so badly. I have tried several times to totally restart the computer by holding down the power button for a few seconds. The MacBook restarts fine but upon startup the fans start running loud again and the Performance of the computer is clearly slower than normal. For example, when I maneuver with the trackpad down to the dock the icons are very slow to respond. Also, normally upon startup my keyboard illuminates upon viewing the log in screen, however for some reason this is not happening either.
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I got my laptop last week and at first it did not make any sounds. However last night I was working with WORD and EXCEL and the fans started to turn on, not loud, but they were constantly running. It was kind of interesting cause these apps arent too demanding, but thought nothing of it. Turned on the laptop this morning and the fans started right up again. Currently only using Safari and the fans are still on. Again, they arent running loud, but I can hear them in my room with little background noise, which I did not hear when I first got the laptop. Any words or wisdom or suggestions?
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Fan and Temperature Issues with certain apps

Hi there
I have what seems to be an issue with the cooling on my 2011 Mac Mini where when running some apps the cooling fams for the CPU seem not to kick in.
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Thank you everybody for your sound advice - Normally John Hammer1 I would agree with you, if OSX can do a task then let it do it and not use 3rd party software, but however in this case I don't think OSX was doing a very good job at cooling the system. To use an analogy you wouldn't drive your car with the temperature gauge constantly near the red line as it would damage your engine. This is how my MM was running when editing (of which I do quite a lot) and having a computer constantly running near its thermal limits isn't doing it any good.
I feel (and have always felt) that my Mac Mini has been lacking in cooling and that whilst the MM is a pretty little computer its performance has always been hampered by its lack of cooling. I'd rather have a bit more noise from the fan and have a more efficient computer.
I have installed Fan Control 1.2 and so far it is doing its stuff ok. Like den.thed I'm a bit old school, I usually keep my Macs for around 4-5 years and I want this one to last.
Again thanks everyone for your advice.
Jonty

Fan and Temperature Issues

Hey everyone,
Recently my fan started getting pretty loud. I opened up the back of my 2009 13" Macbook Pro and gave it a through and through with a compressed air canister, I also unmounted the fan and shot some compressed air into it as well. Now I'm kinda worried, because that only kinda dulled out the noise a bit, and the internal temperature of my CPU is getting a little too hot for comfort(100 C and up). The problem isn't so much the temperature, but the fact that in response to these high temperatures my fan is consistently at a MAXIMUM of 1500 RPM according to SMC Fan Control. Even if, using SMC, I set the minimum fan speed to 4000 or 6000 RPM, my fan just stays at consistently low speeds. Would opening up the fan itself and cleaning/lubing solve the problem or should I just replace the fan altogether?
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thanks, any temporary fixes would be nice too.

MacBook Pro (Mid-2010) - Loud Fans and Extreme Heat

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When just playing simple Youtube videos or facebook games, my fans spin at high RPM and are very loud and the underside gets extremely hot (CPU > 80 deg. Celsius). Running OSX 10.8.5. What may be the issue here? It has only starting becoming apparent recently.
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This is with a youtube video playing.
Hope this works, I appreciate the help!
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Recently I just noticed that my powerbook's fan is extremely loud. Is this normal? I don't think the fan was this loud when I bought it 2 years ago. Also it gets pretty hot.
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Hi Christine,
Welcome to Apple Discussions.
First, which model of Ti do you have? (Apple Menu>About This Mac>Processor)
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Loud fan and overheating issue.

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