HT3964 MacBook fan is always on

i can't fix my macbook MC374 problem with this guide... i reset my SMC but the fan is always on... any suggestions?
i have Snow Leopard 10.6.3 on that and since i update it to latest version with about 8GB download from Software Update my problem is that my fan is always on....

The fan is always on. It a question of degree. Under 'normal' or low level usage, the fan speeds will 2000 rpm. If you are pressing the CPU, the fan speeds can/will go to 6000 rpm.
Install iStat pro (from the Internet) and then you will know what is occurring inside your MBPs. Also look at the Activity Monitor (In your Utilities folder) and see if the applications you are using are in line with the internal temperatures.
Ciao.

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My Mail is really slow and the macbook fan is always on.

I have tried different fixes involved in the cleaning up the index, envelope, etc and they do work, for about an hour or so and the problem starts again. My fan is always on when things start slowing down. and then soon my whole macbook is affected. I have over 350 000 messages saved. would that be the cause? can anyone help? thanks.

How much free space on the startup disk? Not enough can slow the drive down.
Click the Apple menu icon top left in your screen. From the drop down menu click About this Mac > More Info > Storage
Make sure there's at least 15% free disk space.
350,000 messages? Depending on file size, that could be taking up a ton of storage space.
To see a breakdown click About This Mac from your Apple () menu then click More Info then click Storage.
OSX Tips The Storage Display
message edited by: cs

MacBook Fan is ALWAYS On

Hey everyone, my white MacBook has recently begun spinning its noisy little fan whenever I am using it. It used to only come on when it was doing something processor intensive like playing back videos, 3D gaming or hi-res Photoshop work. But nowadays it seems like it's always on, no matter how laid back the task. I'm listening to this noisy thing as I type into a text area on a webpage. It's annoying. And even more so since I'm used to it being quiet unless I'm doing some heavy computing.
Any advice?

Hi nugx,
Sounds like maybe a hung process.
Launch Activity Monitor (/Applications/Utilities) and change the drop down at the top to "All Processes" and see if anything is using more than about 10-15% CPU load. If so... what is it? If it's nothing critical to system usage, kill it and see if the fans quiet down in a few minutes.

Fan is always running loudly on Macbook Pro

I've had my Macbook Pro for just over three years now, and I haven't had a problem with the fan before now. A month or so ago I started noticing the fan was always on a constant hum, not so much that it was a problem, but just present. I figured I was just doing too much with it, even though I don't use much other than word, safari, and iTunes. Over the last couple weeks, however, I've noticed the hum just getting louder constantly. I've tried restarting the computer several times, and I can usually go about 10 minutes after that without the fan being loud, sometimes less if I try to play a video.
At this point there are times when it literally sounds like there's a motorcycle in my laptop, and I can feel a vibration when I type. However, I got a monitoring app and it says the temperature and fan speed are both at a normal temperature. I'm not sure what this means for my laptop, and I really want to fix this problem.
Any thoughts?

First try a SMC reset:
http://support.apple.com/kb/ht3964
If there is no change, open the MBP and look inside. Your MBP may very well have dirt and debris that needs to be cleaned out.
If that is not the case, run an Apple Hardware Test:
http://support.apple.com/kb/ht1509
Note that an error free AHT is NOT definitive.
The last resort is an appointment at an Apple store genius bar for a free evaluation.
Ciao.

Hello i have a problem with my macbook pro become to slow to write any thing, to do any thing and the fan is always on never stop what can i do?

hello i have a problem with my macbook pro become to slow to write any thing, to do any thing and the fan is always on never stop what can i do?
i already reinstall the software many times and still the same i dont know what is happening is there is somebody who can help me please im will waiting

There are any number of possibilies... you could have problems with runaway applications, causing your machine to overheat and setting the fans off, you could have bad fan sensors, etc.
Open Activity Monitor (Applications>Utilities) and see if you have any apps that may be hogging the CPU. Call back.
Clinton

Is it free to take my macbook air to an apple store to get a check because the fan is always running?

is it free to take my macbook air to an apple store to get a check because the fan is always running?

Yes, the diagnosis at the apple store is free, ....have them find out what is wrong for you
However its totally normal for the fan to be always on, on your macbook Air.
SMC (System Management Controller) could be causing the fan to misinterpret temp. an SMC reset would likely fix this.
If you can HEAR the fan all the time, it might be running noisy due to dust/junk in the fan blades and hub.
If you have pets or a dusty room, fans trap dust and pet fluff like a magnet. Might just need a cleaning.

My fans on my MacBook Pro are always going off

My fans on my MacBook Pro are always going off
I am running VM ware as soon as I go to the PCs
Side The fans start
I can also be on the Mac side in the fans just start going
I'm not able to get online
On the PC side
And anyone please help

No sound with headphones. I ended up restarting my computer and upon rebooting the sound came back. So it works but I have no idea why it stopped working.

Hi there, i bought my macbook 1 week ago and its working fine. BUT the fan is always running and it is very annoying? what should i do

hi there, i bought my macbook 1 week ago and its working fine. BUT the fan is always running and it is very annoying? what should i do

Take it back to the store where you bought it for a hardware check and/or exchange/refund.
If they say "that's normal" then get your money back.
Nothing worst than a annoying fan you can't do anything about.
I has a eMac that did that, sounded like a vacuum cleaner running all the time, I'm so glad I trashed it and will never buy a machine I can hear running in a near silent library.
Some advice, the higher end models with a dedicated graphics do tend to operate cooler, it's the one's with only CPU graphics (Intel) regardless if a Mac or PC that tend to make a lot of noise.
Graphics should have never been put on the CPU, it just doubles the heat and doubles the fan noise.

Macbook fan keeps running, won't sleep or hibernate

So here's the deal, my macbook (late 2008 aluminum) fan is always running loudly, from 4500-6000 rpm, and the temperature stays around 80ºF even if the computer is idling. I have to shut it off for the fan to turn off. When I close the lid, the screen shuts off, but the computer won't sleep, even if I choose sleep from the apple menu. I tried unplugging the power and letting the screen turn off, thinking it would hibernate, but it will not hibernate either. I made sure there is no dust in vents or anything, tried SMC reset, installed latest software, am running SMC fan control, nothing seems to be working. I'm running Mountain Lion 10.8.3. and my activity monitor shows no unusual activity. It does feel hot, so I don't think the heat sensor is off, it is just heating up and won't cool down. Could the fan be running poorly and not cooling properly? Please help.

There's a log in Event Viewer. It might have the issue logged.
Does uninstalling the Power Management driver and reinstalling v1.62 help?
W520: i7-2720QM, Q2000M at 1080/688/1376, 21GB RAM, 500GB + 750GB HDD, FHD screen
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Y3P: 5Y70, 8GB RAM, 256GB SSD, QHD+ screen

Loud MacBook fan

My MacBook fan is running at 6200 rpm, 75 degrees almost constantly. In a class yesterday someone asked me to move because my computer was distracting. Please advise!
Even running just one program (FireFox) the fan runs constantly.

hi first time to post here~
my questions goes: the fan of my black macbook has started to "go nuts" for the past few weeks and it never happened before! I checked the fan speed using smcfancontrol and it was always around 6000 (exhaust). at first i thought it got to be the fan control software which messed up my fan and made it run like crazy, but after the uninstallation the problem remained the same. So like some advices here I checked "Activity Monitor" when my fan went crazy again. i found out the latest-updated iTune 8.0 took almost 55% of my CPU-especially whenever I turned on the "Visualizer." as long as I stop using "Visualizer" my fan is back to normal and quiet like a sleeping baby. May I ask is this normal?? Should i take my 4-month-old macbook to apple store for check?

ICal makes my MacBook fan go wild

when starting up iCal my MacBook fan stirres up for a couple of minutes and in Activity Monitor I can see it needs more than 95% CPU. Sometimes also SyncServer kicks in taking also all CPU and even more time.
Is this normal? Or is my ical database corrupted. How can it be that a simple background sync is taking so much CPU?
If this is kinda normal I will switch to Google calendar, to avoid the whining of the MacBook.
Looking forward to your response.

I don't always get the whining fan, but once I launch iCal, I can say goodbye to any free system memory. This has been recurring for at least 2 months, and I've been watching Activity Monitor very carefully, and see an absolute connection with iCal and SyncServer. It's very frustrating, 'cause I really want iCal to work, but not at the expense of my (theoretically powerful MacbookPro w/) System memory (2gb).
At the suggestion of my Apple store's "genius," I exported all my calendars, deleted them from iCal, trashed all iCal cache and metadata folders, plists, etc. I then brought in a few calendars one at a time. I purposely avoided any subscribed ones, and let iCal delete alarms. I ran the computer for a few days with only 3 or 4 calendars, and the behavior was a bit better, but still SyncServer was using LOTS of memory.
My console logs are showing lots of lines with "Invalid address property:" warnings (w/ referenced to eddresses that are valid); and "WARNING: BestCalendarDateFromString - can't interpret:"
So, I'm back to wondering: what can I do!?!?!?
(It is slightly comforting to know that someone else is experiencing similar problems. I only hope someone reads this and has a clue as to what's going on and how to solve it.)

Macbook fan running at high rpm when doing nothing

My macbook a1181's fan is always running at a high rpm and a can't figure out why. I already checked the activity monitor, made sure there was no documents waiting to be printed (i have had this problem in the past), and I removed and cleaned the fan and vents. Could os x 10.7.5 be part of the problem? I had absoutly no issues with 10.6.8.

Check your activity monitor. Sounds like you have a program running in the back ground your not aware of.
You might also try to reset the SMC and/or PRAM.

Help!!! Macbook fan not turning on!

Hello there!
I have a problem with my macbook fans. The fans do not turn on until the computer has been running at 80°C for 5 minutes and only then my macbook only runs at 3000 revolutions. The fans idle is 2000... I know this because I have an application from the mac app store called temp. guage and that tells me temperatures and fan speeds.
The fans to both of my brothers macbooks turn on once the computer is about 60-75°C and it turns onto 6000 revolutions and their idle is 2000 revolutions . Could it be that I have a macbook and not a macbook pro? Or could there be something wrong with my fans?
When I got the computer about 1 year ago the fans turned on a lot but I didn't have this app for various reasons but I could hear the fan turning on. I know that the fan back then was faster becaue i could heat it and when the fans now are at 3000 I can not hear it.
Could a connection be loose - I have never opened the back case but I carry the macbook a lot with my in school? Could there be so much dust on the fan that it tries to spin faster but it simply can't? Could it be the grease on the fan? can anyone help me narrow my decision? Do I need to replace my fan?
Today I was at the apple store and I did a diagnostic test. The only problem was with my speakers but I did not notice that. Point it the fans were all right in the diagnostic test but in reality the fans are not all right...
Someone please help! This is a desperate problem my computer keeps on shutting off because it gets too hot.
Category: Power
Thanks in advance!
Avranius

First thing I would try is resetting the machine SMC.
http://support.apple.com/kb/HT3964

PowerBook running warm/hot & fans almost always running

Does anyone else have their fan(s) constantly running? I can be doing something as simple as checking my e-mail on a flat table like surface and before I know it both fans are running. Back a couple years ago Apple replaced my fan under the screen under AppleCare, now it is buzzing again and being out of AppleCare coverage I'm not rushing to have it replaced. Any ideas why my book's fans are always running? Anyone else have this?

Hi, PBJohn. Assuming for the moment that your hardware is working properly and your fans are running to remedy an excessive heat buildup, plausible reasons for the heat might include:
1. accumulated dust and crud inside the Powerbook, obstructing the fans and/or the cooling airways;
2. multiple CPU-intensive processes running at once, including processes running in the background that you've forgotten or never known about;
3. insufficient heat-transfer paste between the processor and the heat sink;
4. lack of routine maintenance and periodic cache cleanup;
5. an overly full hard drive;
There are probably others I'm forgetting, but this list gives you some things to check.
For 1, flip back the keyboard and blow the interior out with compressed air, then remove the bottom panel and do the same to the underside of things. Make sure the air intake and outlet vents are unobstructed.
For 2, open Activity Monitor and see what's running. If you have Tiger installed, turn off Widgets — they're incredibly CPU-intensive. Drive indexing can also consume a lot of CPU cycles and produce constant hard drive activity.
3 is quite unlikely, unless you've dismantled the Powerbook and separated the processor and heat sink yourself, wiping off the transfer paste and then forgetting to apply any when reassembling.
For 4, run the background maintenance tasks manually and/or download Onyx and use it to run them and clean the various caches.
Mac OS X: How to force background maintenance tasks (logs and temporary items)
For 5, make sure your hard drive has at least 3GB and preferably at least 5GB of free space available at all times.
If you check on all these things and still can't reduce the constant operation of your fans, you may have a hardware problem.

How my macbooks fan works.

This is how much macbook fan works.
http://mb.neom.ca/fan.mov
I started the recording when it was mooing, and then I ran a process to max out the cpu and heat it up. As you can hear, the hotter it gets, the harder the fan spins. Once I turn off the process (you will hear a beep on the movie when the process is terminated), you can hear the fan start to spin down. About 30 seconds after the movie was done, the macbook resumed mooing, and is still mooing as I type this.
It's an interesting look at how the macbook heat management is telling the fan to work.
My macbook is a week 24 built.
Message was edited by: neom (fixed the link!)

Updated with smaller movie.

HT3964 MacBook fan is always on

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