My Fans Never Shut Off

When I first got my new macbook pro, the fans only turned on once in a while when the system got hot. All of the sudden, they are always on. From the moment I turn on the system to the moment I shut it down, the fan is always on. Is this normal? Why did it suddenly change for me?
Thanks

I ran the hardware test and it didn't find anything wrong. The noise that I'm hearing is a really really low blowing noise that comes from the left side of the notebook. When the AC turns on or if there's another noise in the room I can't even hear it. And then sometimes the fans get louder, maybe that's when the fans are actually turning on, like when I insert a CD or soemthing the blowing gets much louder. I'm thinking that this must then be normal if it's such a low noise and then the blowing gets loud when I think it actually needs the fans.

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H330 Fan Never Shuts Off

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hi grandprix60490,
Welcome to the Lenovo Community.
The fan usually spins at a high rate if the BIOS configuration is setup that way or if the thermal sensor is picking up high temperature reading. If you're concern about the heat, you can use CoreTemp to monitor the temperature (it also monitors the TJ Max of the CPU (this is around 95-100 degrees celsius for Intel chips). When a CPU core goes beyond the TJ Max, a CPU throttle, downclock, a BSOD, or a system shutdown will occur. You can get it here - http://www.alcpu.com/CoreTemp/
If you're hearing any rattling / grinding noise that's comming out from the fan, you will need to send the unit in for service. Otherwise, if you're just running on medium load and the one of the CPU core reaches TJ max, the thermal paste (CPU cooling compound) needs to be re-applied.
Hope this helps
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The fan on my iMac never shuts off?

The fan on my iMac never shuts off? Would someone be able to suggest what is the probable cause of this and what can I do about it?

Sometimes an SMC reset can help resolve this. If it fixes it but proves to be temporary a trip to the workshop may be needed:
http://support.apple.com/kb/ht3964

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Your computer will not boot.
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OK.
I don't know why that is happening then.
I read the release notes for your latest BIOS update and that doesn't address a fan constantly running issue.
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Hello !
Try the following:
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If your problem has been resolved then would request you to Click on "Like" and accept as "Solution" so that other Advisors doesnt invest their time on this Message anymore.
Thanks.

Fans never turn off!

sometimes when the fan in my macbook kicks on, it stays on until i force the computer to shut down (when the fan is stuck on, it won't shut down...the blue screen comes up and the circle thing comes up, but it won't shut down...i have to hold down the power button). sometimes i can get it to sleep, but as soon as i wake it up, the fan kicks back on. sometimes it won't sleep at all when the fan is on.
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It's my understanding that the fan IS always on when the machine is on; that's what keeps the temperature within reason. The fact that you can HEAR the fan is perhaps more of an issue. The default speed of the fan (what it's running at when it's not under load) is 1800 rpm. At that speed, unless you have pretty sharp hearing, you shouldn't really notice it unless there's something wrong with it. Under heavier loads, the fan will speed up and become louder; it is normal to hear it then.
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My fan wont shut off.

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Hey Gang,
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MacBook Mac OS X (10.4.7)

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--------------------------------------------------------------------------------
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Hey, I'm not sure if this topic has been brought up in the past or not, but I'm having major problems with my iMac and the fan never turning off. From the moment I turn the computer on the fan is running at full speed.
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Rik84,
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_SMC RESET_
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_PRAM RESET_
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• Hold the keys down until the computer restarts and you hear the startup sound for the second time.
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Regards,
Roger

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My Fans Never Shut Off

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