Fans are running at full speed after hard drive upgrade. Used same brand drive.

My Western Digital 500GB hard drive crashed. The date on it is Aug. 2010. I swapped it out for a Western Digital Caviar Black 1TB. All plugs were identical including the temp sensor cable. My fans now run at full speed. What gives? BTW. This is th 3rd WD hard drive to fail at my office in multiple iMacs. I have a 21.5 iMac i3 3.06ghz. I have tried the SMC reset,.. no luck. Reset the PRAM,.. no luck. Hard drive and computer function perfectly, it just sounds like a loud annoying PC.

After a little more research the only thing I found for 21.5" mid 2010 imac were three part numbers for three sensor cables which are a function of vendor:
922-9215, Hitachi
922-9216, Seagate
922-9622, Western Digital
The strange thing here is these are vendor specific and not model within vendor specific. So you started with a WD drive and replaced it with different model, but still a WD drive. So you would think it would require the same sensor cable.
Maybe the drives are different enough for this to matter. Or maybe you should check the connections one more time. Be it model of drive or connections, whichever it is, the sensor cable is the source of your problem.

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TS1433 Fans run at full speed after computer turns on

Fans run at full speed after computer turns on, and a lot of times while i'm working they suddenly start blowing and won't stop. Tried the reset SMC, nothing happens. Also the unplug powercord-method does nothing.
Anyone?

Exactly what method did you use to reset the SMC, every Mac has different methods and I want to ensure you used the method for an Intel based Imac. The correct instructions are in the iMac SMC and PRAM reset link. Do the SMC reset at least 2X!

I have a dual 1.8 ghz pwer pc g5 and sometimes i put it in sleep mode and come home on my lunch break and the fan is running at full speed and the computer has frozen up...what is going on here?

and sometimes i put it in sleep mode and come home on my lunch break and the fan is running at full speed and the computer has frozen up...what is going on here? is it a virus or has my computer been hijacked? it cant be good for the computer...anyone ever had this problem..?

Your problem has been reported many times, but causes are as varied as individuals.
Can we assume that a hard shutdown allows a normal restart?
Can I assume that you have used Disk Utility from your OS X install disc to repair the hard drive directory? The freezes and hard shutdowns require that the drive be repaired (not permissions) or soon the machine won't boot at all.
If the root issue is software related, in Console (the application) under Logs, there should be loggings around the time of sleep and logs that tell you what process went wild and froze the machine.
Network activity is also a common casue.
Other info:
http://support.apple.com/kb/ht1776
If hardware related, such as an external drive, other USB device (Wacom tablet) or USB PCI card, ejecting, disconnecting, removing, or in the case of the Wacom, updating drivers, are all potential remedies.

Fans still running at high speed after smc reset

I have an i Mac Version 10.6.7, 4 GB RAM and 2.66 GHz Intel Core i 5 and since yesterday the fans are running at high speed. I tried to reset the SMC as instructed on Apple Support Site but it won't help.
Does anyone have an idea?
Thanks.

Try the reset again. Sometimes it takes several. This time leave it off wall power for an hour before holding in the power button.
If that doesn't help, run the Hardware Test in Extended.
http://support.apple.com/kb/ht1509

Fans running full speed after hard drive replacement

I have a 24" aluminum iMac (iMac7,1) which had a hard drive failure. I replaced the hard drive myself and all went well. However, now my fans are running full speed. This appears to be because of a problem with detecting my temperature sensors now. During the install I only touched two temp. sensors, the hard drive sensor and the LCD sensor. I made special care to make sure I got the sensors back in place.
Using iStat Pro the only temp. sensors I have readings for are the Hard Drive and Power Supply. I am missing ambient, optical drive, CPU, and display. Out of those the only one out of the missing ones I touched are the display one. I have since gone back into the machine to ensure the LCD temp. sensor was fully connected and to ensure the HD one was connected (although that one is working).
What is really strange is the ambient sensor appears to be a diode on the main board so I really don't see a way I could have messed that one up. Also, I didn't touch the CPU sensor (didn't even see it), nor did I touch the optical sensor.
Anyway I have tried:
PRAM reset
SMC reset
went back into the box to make sure all temp sensors where in place.
I am out of troubleshooting ideas. Can anyone provide additional insight?

Mechanic man thanks for the response.
Besides for the fan noise the machine is running like a champ. The new hard drive seems to be fine, actually my machine boots up faster now than it ever did (faster drive I suppose). I ran disk utility and did a verify on the new disk and it didn't detect any problems.
The fans run at full speed immediately at power-on (maybe a one second pause). I first noticed it when I booted up from the startup disk to do a time machine restore. So yes, it occurs when booting from a system disk.
I have been unable to run Apple Hardware Test, I saw this step in some google searching and Apple docs but I don't seem to have AHT on any disk. I have tried putting the Snow Leopard disk in and holding "d" at boot time to no affect. I did some further reading and found that AHT may only be included on disks that come with the machine. I am going to try to dig up my Tiger disks and see if I can get AHT to run from there (10.4 was the factory installed OS when I bought my iMac).
I am also considering trying to re-install SMC firmware (http://support.apple.com/kb/HT2368). Even though it will be the same version at least I know the SMC reset has taken place.
Since the fans run full speed right at start up that suggests to me that it is a physical hardware problem (i.e. something wrong with the sensors) or a firmware issue. I am leaning toward firmware.

One of my MacBook Pro's fans is running at full speed

Out of the blue today, my 2011 MacBook Pro started fans went mental when I awoke if from it's sleep. They started running at full speed, far louder than I've ever heard them before. I searched through other discussions and it suggested I try an SMC reset. I performed one of these with no success.
I then opened smcFanControl and noticed that my leftside fan was running at 7000rpm+ and the rightside fan was running at normal speed 2000rpm. It randomly spools on and off high speed and I cannot find any fixes or similar problems online. Can anyone suggest a fix for this or should I be taking it to a repairer?
FYI my logic board was only replaced in April under warranty so could it be faulty?

Hi andyBall_uk
SMC fan control measures temp also. Currently running at 47*C as you can see in the screenshot below. I tried overriding the fan speeds...works for the right fan but not the left one so it appears only the left fan has the fault.
The weird thing is, when you press your finger down anywhere on the left speaker next to the built-in keyboard, the fan slows back down to normal speed, but when you let go it speeds back up again. I might open it up in the morning to see if any of the connections are loose, because it seems weird that this happens with a small amount of pressure applied to the body. Also of you tilt the macbook it sometimes slows back down to normal speed (but sometimes stays at high speed). I will let you know how I go. Thanks for your suggestion/s

2012 iMac fan sporadically running at full speed.

I purchased a 21" iMac in October. In the last two weeks, the fan has started having issues. It will intermittintely run at full speed for anywhere from 5 to 20 seconds, and then shut off, only to max out again in a minute or so. The computer itself is cool to the touch, the only programs running are Finder and Google Chrome, and it's in a well ventilated and cool area. I've already reset the SMC and the PRAM, seeing if either of those solved the issue, but it is still occuring. Anyone have any idea what might be causing this?

Could be a defective sensor. You can also try Intel-based Macs: Resetting the System Management Controller (SMC) and see if fixes it. If the computer is newly purchased, then take it to the Apple Store for repair. it's in warranty.

Fan running at full speed after shut down.

My brand new, three day old 8 core Mac Pro has already frozen three times. I have been reading about the screen garbage and then the freeze. That is happening with me, too. But what is going on right now as I type on my old G4 is that the fan on the new Mac Pro is running full speed and the computer has been shut down! The fan has been blowing like this for at least 30 minutes. I am hesitant to unplug. But I can't just leave the office with it blowing like that. What is going on?

Have a lot of USB stuff attached...
Apple keyboard/mouse, Kensington track ball, (then through hub) Logitech web-cam, External HD (USB) for time-machine, epson scanner, iPod USB cable, shuffle, dock, and...ah ha..may be a culprit...a Microsoft joystick for playing x-plane (when I was thinking about what I do when this happens, I said I'd switched resolutions to use xplane..but, of course, I would have had the joystick plugged in as well..this could be the one difference (I only connect the joystick when I'm going to use x-plane)).
I will experiment some tonight...shutting down with and without the joystick to see if that makes any difference.
Now that I think of it, that seems to be the one 'difference factor'...and it would be Karma to have the Microsoft hardware messing up my Mac.
I don't have any extra PCI...nothing in firewire.
Thanks for giving me a possible lead...I'll report back.
Message was edited by: midiotlv
Message was edited by: midiotlv

IMac : Fans run at full speed after computer turns on and male terrible noise

The noise is unbearable.
I have tried plugging it off/on, w the power cord, resetting SMC and NVRAM-nothing. Also, when I put it
to sleep mode, it goes quiet, but then goes back to sleep mode every 5 sec until i RESTART IT.
Current values show, left fan: 998 RPM
RIght fan: 1256 RPM
Please, help, I'm not a pro so use basic language, please.
<Edited by Host>

*MAKE, sorry

Mac Pro fans run full speed after installing Solid State Drives

I recently visited the Genius Bar at my local Apple store because my Mac Pro's fans were running at full speed after installing 2 solid state drives. The genius told me that it was because the drives themselves are so small they don't touch the metal tab on the motherboard that reads the drive's temperature, so it defaults to running full speed. Does anyone know how to fix this problem? I've tried smcFan Control but it doesn't let me set the actual fan speed. I'm getting 5200 rpms on my Boost A and B fans, and this causes an insane amount of noise. Can anyone help?

Which model Mac Pro?
I have an SSD in a 2009 (MacPro4,1). I removed it from the 2.5 in stamped metal can, and just installed the bare circuit board onto the SATA connector. It does not make any contact with the metal tab below the SATA connector. The only trouble I have is that Tech Tool Pro says its temperature is not optimum when it does disk tests.

MOVED: Fans on full speed after graphics card removal

This topic has been moved to GAMING Notebooks.
https://forum-en.msi.com/index.php?topic=253215.0

Quote from: CalcMasterH on 15-February-15, 11:45:39
Don't know if this is the right place to post this, but I'm pretty sure it has to do with the graphics card.
So a few weeks ago, my NVIDIA video card was damaged. Short-circuited or something, but there's a burn mark over one of the modules and it was preventing my computer from turning on. It had to be taken out or replaced, and because I didn't want to spend the money replacing it, I opted to remove it and just use my integrated graphics card in my laptop.
However, now the fans in my laptop are running at full speed all the time, regardless of CPU/GPU temperature. I've searched over several forums for a solution, and I've looked into several different programs, including MSi Afterburner, NVIDIA GeForce Experience, SpeedFan, Riva Tuner, and RWEverything, but to no avail. Most of them require a video card in order to control the fan speeds, but since I don't have one in my computer, I can't change anything. I've also looked into the BIOS, but it doesn't appear to have any fan controls.
I'm pretty sure the fans are running at full speed because they can't get temperature data from the (missing) card.
Laptop:
- MSi GT60 0NE
- (Had a) NVIDIA GeForce GTX 675M
- Integrated Graphics: Intel HD Graphics 4000
- Running Windows 8
Any help would be appreciated, and I can provide more info if needed! Thanks!
Have you checked if your bios have a graphics switch or w.e it's called where you can switch from Nvidia to UMA GPU = Intel gpu ? if your laptop dont have that then nvm about it

Fans on full speed after graphics card removal

Don't know if this is the right place to post this, but I'm pretty sure it has to do with the graphics card.
So a few weeks ago, my NVIDIA video card was damaged. Short-circuited or something, but there's a burn mark over one of the modules and it was preventing my computer from turning on. It had to be taken out or replaced, and because I didn't want to spend the money replacing it, I opted to remove it and just use my integrated graphics card in my laptop.
However, now the fans in my laptop are running at full speed all the time, regardless of CPU/GPU temperature. I've searched over several forums for a solution, and I've looked into several different programs, including MSi Afterburner, NVIDIA GeForce Experience, SpeedFan, Riva Tuner, and RWEverything, but to no avail. Most of them require a video card in order to control the fan speeds, but since I don't have one in my computer, I can't change anything. I've also looked into the BIOS, but it doesn't appear to have any fan controls.
I'm pretty sure the fans are running at full speed because they can't get temperature data from the (missing) card.
Laptop:
- MSi GT60 0NE
- (Had a) NVIDIA GeForce GTX 675M
- Integrated Graphics: Intel HD Graphics 4000
- Running Windows 8
Any help would be appreciated, and I can provide more info if needed! Thanks!

Quote from: CalcMasterH on 15-February-15, 11:45:39
Don't know if this is the right place to post this, but I'm pretty sure it has to do with the graphics card.
So a few weeks ago, my NVIDIA video card was damaged. Short-circuited or something, but there's a burn mark over one of the modules and it was preventing my computer from turning on. It had to be taken out or replaced, and because I didn't want to spend the money replacing it, I opted to remove it and just use my integrated graphics card in my laptop.
However, now the fans in my laptop are running at full speed all the time, regardless of CPU/GPU temperature. I've searched over several forums for a solution, and I've looked into several different programs, including MSi Afterburner, NVIDIA GeForce Experience, SpeedFan, Riva Tuner, and RWEverything, but to no avail. Most of them require a video card in order to control the fan speeds, but since I don't have one in my computer, I can't change anything. I've also looked into the BIOS, but it doesn't appear to have any fan controls.
I'm pretty sure the fans are running at full speed because they can't get temperature data from the (missing) card.
Laptop:
- MSi GT60 0NE
- (Had a) NVIDIA GeForce GTX 675M
- Integrated Graphics: Intel HD Graphics 4000
- Running Windows 8
Any help would be appreciated, and I can provide more info if needed! Thanks!
Have you checked if your bios have a graphics switch or w.e it's called where you can switch from Nvidia to UMA GPU = Intel gpu ? if your laptop dont have that then nvm about it

Cooling fans constantly run @ full speed after replacing the upper CPU??

After replacing the upper CPU on a Power Mac G5 (June 2004), Dual 1.8Ghz PowerPC, model M9454LL/A, all the cooling fans constantly run at full speed. All other operations are normal.
I've read, "...after replacing or switching CPU locations the Logic Board doesn't properly recognize the CPU's in their new location and a "Thermal Calibration" is needed". Could a "Thermal Calibration" possibly correct the constant full fan speed issue?
What software would be required?

Hi-
Could a "Thermal Calibration" possibly correct the constant full fan speed issue?
Yes.
What software would be required?
The Apple Service Diagnostic disc (ASD) of the proper version for your machine.
Call an authorized Apple service provider and arrange a calibration, as the disc is not readily available to individuals.

HT3964 Fans running at full speed even after SMC reset.

I have reset the SMC twice on my iMac 24" (early 2009) and my fans still run at full speed, but only after I've been away from my computer for a while. It never happens while I'm using it. Any suggestions? My Apple Care plan ran out a few weeks ago and so I can't call in without paying.

Try iStat Pro and see what temps are being seen by the system.
http://islayer.com/apps/istatpro/
I know this won't fix it but it might allow you to see which sensor might be acting up.
Have you tried a PRAM Reset? Again just fishing.
Option + Command + R + P during powerup thru 2 chime sequences

Macbook May 2010 edition exhaust fan runs at full speed

Bought a new Macbook around February 2011. Yesterday all of a sudden while watching Netflix, the exhaust fan started running at full speed (Approximately 6200 RPM). I thought the machine was overheating. So I immediately shut it down and let it cool. But I noticed the machine was barely warm.
When I started it up again, it started making the same noise with the exhaust fan running at full speed. I installed SMCFanControl and I see that the CPU is barely warm - 35-37C and yet the fan is running at full speed. I looked at the CPU/HDD usage and there is barely ANY usage (~90% idle). Nothing out of the ordinary. So it definitely doesn't seem to be a heating issue.
In order to troubleshoot this I have done the following:
1. Installed latest upgrade - Snow Leopard 10.6.7
2. Reset SMC
3. Reset the PRAM
4. Tried booting from the install DVD. There as well it exhibits the same issue.
Neither of these steps have helped me with my situation. I would really hate to go to the apple store as its always crowded and would end up wasting time. Are there any other steps I could try?
Update: I tried running the Apple Hardware Test from the DVD. This is the error code that I got: 4SNS/1/40000001: TN1D- -1.000
Can someone please tell me what this means?

I don't know what that code means for sure, but it sounds like one of the temperature sensors may have died, so the fans just run at full to cool.
I would take it to the apple store.

Fans are running at full speed after hard drive upgrade. Used same brand drive.

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