Closed lid, fans always running

Howdy. I've been using my MBP in closed lid mode attached to a Cinema Display. I expected the fans to run constantly when in use, especially with XP running in Parallels. When I put the computer to sleep--still attached to monitor, usb keyboard, bluetooth mouse and power adapter--it acts as I suspect it would, fans stop, front LED starts fading in and out. However, I'll come back later and the LED will be solid, display blank, and the fans running away. The keyboard or mouse will wake the computer and then it runs as normal. This has happened overnight as well as in half an hour, and several times.
I am kind of getting concerned about using the computer this way. Fans always fail, and I am not really looking forward to opening the computer up again.
I guess my questions are: why would the computer be running the fans, especially after being in sleep for hours, and is it shortening my MBPs expected life using it with the lid closed?
Thanks.

I'd guess/assume that something is actually waking it from sleep and causing the heat/fan activity and that when you return you're not actually waking it up just re-activating it from screensaver mode ...
Run Utilities/Console and click 'All Messages' top left - what lines appear during the time you think it should be sleeping ?
It isn't shortening the life of the hardware using it in clamshell mode but if something is causing it to overheat regularly that will have an impact on internal components/motherboard that could be detrimental.

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disk0s1 (disk0s1) <not mounted>: 209.7 MB
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Installing CleanMyMac will corrupt your system. I know of no way to recover from its effects other than to reinstall OS X and other essential software. "Essential" is defined to specifically exclude CleanMyMac as well as all similarly ill-conceived "cleaning" products that are likely to have similar effects. Never install such junk on a Mac.
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Okay - Dang this was a pain to figure out!
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Fans always run on full

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What are you using to check the calibration?
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Closed lid, fan continued to run, body got extremely hot

My wife closed the lid to our early 2011 MBP (15" 2.0 GHz) and put it in the sleeve. After about 6 hours she went to use it and realized that the fan was going very loudly and the body was too hot for her to pick up. I took it out, opened it up to do a hard shut down, and let it cool for about 30 minutes. After that I booted it up and am using it to type this right now. Seems to be working fine, but has anyone else had this problem, and would you know what the cause may be?
Message was edited by: chadwatson

It sounds like the computer didn't go into sleep mode properly and maybe even froze in an active state. Being in a sleeve it would be easy to overheat but I'm surprised it didn't self shutdown after reaching a high enough temp. I'm leaning on that it froze when you closed the lid and never went into sleep mode properly, which is why the safety never kicked in and let the computer heat up...

Fan always running

Hi, I just bought my laptop nearly 1 month ago. I'm notice yesterday always keep running and non stop when I start using until shutdown. Do you have any idea or advise to resolve this problem. Regards,Mazelan

I'm afraid that it may imply signs of an impending logicboard failure.
A possibility, but I'd be more worried if the fans never ran and the PB got too hot . . . and (aside from batt drain and noise), no reason the PB can't be used right up until the time the LB dies. HD can still be removed and accessed via an inexpensive external enclosure, so no loss of data, except the possibility of losing an open file which has not yet been saved, a situation we all face (which is why I save at least once a minute and back up frequently). Of course, if the LB dies, then it's probably time for a new PB, so I guess the question is, how critical is time without the use of this PB while a new one is purchased and does that outweigh the possibility that the PB has a "normal" life span remaining?
Also, can the fan speed be controlled through code (Terminal)?
Not that I'm aware of, and I doubt it. I suspect it would involve a firmware rewrite/flash, way beyond my knowledge.

Closed lid, fans always running

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