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The fan is constantly running on my Mac. What can I do?

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It is supposed too. The bits and pieces inside, but mainly/especially the cpu get very warm/hot, it needs to be cooled, if not, you will first notice a burning smell/then possibly a few sparks/ then screen will disappear/ and the poota will self distruct in 5sec in a big puff of smoke? I think you might just have trouble restarting?

Posted on Nov 15, 2009

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Posted on Jan 02, 2017

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My G5 freezes constantly. What can I do.


Try running Apple Hardware Test on the machine (it's one of the discs that came with the machine.) Also, if it's freezing by showing the spinning rainbow cursor (beachballing) you may have a failing hard drive. That wouldn't be uncommon for how old the machine is.

Feb 24, 2015 | Apple PowerMac G5 Dual Mac Desktop

2 Answers

My 2001 MacBook Pro fans run almost constantly, while my previous 2009 MacBook Pro fans seldom ran. Why is that?


I had to chuckle, because many MBP users actively seek out applications to make the fans run more often and more vigorously. It seems that early models of MBP would quietly cook themselves to an early demise.



You should follow Ted James\' advice regardless - it\'s easy to do and worth doing whether that\'s your problem or not. However, I had a similar problem with my MBP and found that it was a browser plug-in that was the CPU and running the system hot. If it\'s a software package making your mac run hot, that\'s a little more tedious to troubleshoot, but still pretty simple. First - try this simple step: While your mac is running the fans (misbehaving) start the Activity Monitor app - which is in your Utilities folder. If you prefer to use LauchPad to start applications, then you may need to look for "other" start typing "activity" in the search box, b/c the utilities are not shown by that name in some newer OS X releases. Once Activity monitor is running, select the CPU "tab" at the top or bottom of the app. Now you should be able to see how busy your system is in a moving graphic at the bottom center of the app. If your CPU is running at nearly full capacity, have a look at the column called % CPU. If the process name a the top of the list is contributing the majority of your % CPU, then that is the candidate for an errant application overheating your Mac. I\'ve attached a screen shot of Activity Monitor working on a quite system with almost no activity.



2001-macbook-pro-fans-run-almost-nmanvh0t0unvrj5oupx45jw5-5-1.png



It should be obvious, but the next thing to try is to exit or kill that application and see if that allows the fans to spin down.



Hope that helps.

Nov 19, 2013 | Apple MacBook Pro Notebook

1 Answer

Fan won't stop


Resetting the PRAM may do the trick:
You reset the PRAM by rebooting a Mac and then immediately hold down the Command+Option+P+R keys, you will then hear the Mac reboot sound again, signifying your PRAM has been reset. You must hit the key combination before the grey screen appears otherwise it won't work.

you've tried rebooting, you've reset the PRAM, you've done it all, but your Mac is still behaving strangely. What next? In certain circumstances, resetting your Mac's System Management Controller (SMC) can be a solution. This is sometimes necessary to restore normal lower level system functionality to your Mac.

Here's how to reset the SMC on any type of Mac (and any version of OS X) and the type of problems that it may resolve.
When & Why Reset SMC on a Mac? Some Common Hardware Reasons

Typically it's power and hardware related issues that can be helped or resolved by resetting a Mac SMC, particularly if you're having these types of problems:

* Issues with your Mac's cooling fans and fan management: fans run constantly at high speed, fans run high despite low CPU usage and adequate ventilation, fans not working at all, etc

* Power management and battery problems: Mac isn't turning on, sleep isn't working, random shutdowns and reboots, battery isn't charging, Mac won't wake from sleep etc

* Light problems and improper lighting management: battery indicator lights aren't working, display backlighting isn't adjusting to ambient light changes, keyboard backlights not working, etc

* Video and external displays not working: display brightness functionality not working properly, target video mode isn't working properly, external display isn't working, etc

* General performance and functionality problems: abnormally sluggish behavior despite no CPU or disk usage, external ports not working, airport & bluetooth aren't showing up, external devices are not being found, etc

So now that you've concluded you need to reset your SMC (Note that the SMC is on Intel Mac's only), here's how to do it on MacBook's, MacBook Pro's, iMac's, Mac Mini's, and Mac Pro's. Notice that the reset instructions are different for MacBook and MacBook Pro's if you have an internal or detachable battery.
Reset SMC of a MacBook Air, MacBook Pro Retina, or MacBook Pro's with an internal non-removable battery

This is how to reset SMC on most modern Mac laptops:

Shutdown your MacBook Air / MacBook Pro
Connect the power adapter to your Mac
On the MacBook/Pro's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time
Release all keys and the power button at the same time
Boot your Mac as usual

Here's the key sequence to hold down:

Reset the SMC of a MacBook Air or Retina MacBook Pro

Do keep in mind that by resetting the SMC you will lose power specific settings, like the time it takes to sleep a Mac and other customizations to power settings. No big deal, but if you have made many changes to your hardware behavior you will want to adjust stuff like sleep behavior again.
Reset SMC of an iMac, Mac Pro, Mac Mini

Resetting SMC is different for non-portable Macs:

Shut down your Mac
Disconnect the power cord
Press and hold the Mac's power button for 5 seconds
Release the button
Reattach the power cables and boot the Mac as usual

Reset the SMC of a MacBook or MacBook Pro's with detachable batteries

mac reset the smc Older MacBook laptops with a removable battery can reset SMC with the following approach:

Shutdown the MacBook/Pro and remove the battery
Disconnect the power adapter, hold the Power Key for 10 seconds
Release the power key and reconnect your battery and power adapter
Turn your Mac on
Let boot as usual

Hopefully that will clear up your problems, if not it might be worth a visit to the Apple Store or a certified repair center.

Happy New Year,
Kerry

Jul 27, 2012 | Apple MacBook Air Mac Notebook

1 Answer

Got power going to lapto but will not start up


You will see error blink codes usually at the caps lock and num lock keys on keyboard. Go to google and look for blink codes on hp laptops. This should give you an idea of whats wrong. I am currently working on a dv7 which has the same problem but get constant single blinks. I tried replacing the processor which didn't work. I am going to get a new motherboard for this thing cause apparently what I have read is that they get too hot and fry after 2 years. After you get it fixed re up your warranty and keep the inside fan and heat sync clear of debris. Also try keeping cooling fan under the laptop and do not run it constantly with no breaks. Otherwise go get yourself a different brand like Sony, Fujitsu, or mac. These are long lasting brands.

Jul 31, 2010 | Computers & Internet

1 Answer

Compac Presario F700 makes constant humming noise


Sounds like its the fan . The more demand you place on the system makes it run hotter so the fan speed automatically increases to compensate

Jan 19, 2010 | Compaq Presario 700 470024-192 Notebook

1 Answer

Fans on Mac Intel Tower


I would suspect it needs a good internal cleaning. The accumulated dust will cause the computer to overheat. Disconnect all cables and take the unit to a place where you can clean it. Remove the side panel and then with a can of compressed air or an air compressor blow all dust out of the unit. Pay special attention to the heat sink on the processor. Make sure you clean the power supply fan. Be sure and not touch any internal components without first grounding yourself to the chassis. It is best to do this outside as the dust will fly everywhere. You should clean the inside at least once a year. Merry Christmas.

Dec 15, 2009 | Intel Mac Pro Tower Desktop

2 Answers

My fan is running constantly computer seems


Yes, the fan should run continuously else the processor will get toasted. It get very hot without the fan even when the PC is not doing anything visibly.

Dec 15, 2009 | Acer Aspire M1201 Athlon X2 320 Gb PC...

1 Answer

Fan runs constantly


one reason that a CPU fan may be running constantly is that it may not be able to cool the cpu down. usually this could be due to dust or debri clogging the incoming or outgoing vents or even dust accumulated on the fan itself or the heatsink.

Jun 03, 2009 | HP Pavilion a1110n (PX743AA) PC Desktop

1 Answer

Fan / Compressor runs constantly


Condenser fans (the fan next to the compressor) do run all of the time. That is normal.

Sep 18, 2008 | Sub-Zero 661/F Side by Side Refrigerator

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