when you leave "enable fan control" unchecked, your PC should control the fans. If you just unchecked this bix, press Fn+Z (or Fn+Y on some European keyboards) to reset the internal fan control.
Leaving your fan all the time on high will shorten it's lifespan.

I see no reason to let the fans run on High all the time. There are tempture settings in FANGUI that can be set to run the fans when needed. I have mine set on 116f and this has worked well.

I have Enable Fan Control checked and FANGUI is turning the fans on and off when needed.   When you uncheck it the computer should control the fans when they are needed.

 

When your computers fans turn on, turn off, and what speed the are on at, is completely determined by your bios, namely, by the temperature settings within the bios.

So here is the question you should ask yourself:

Who knows better about my computer and the appropriate temperature settings and when the fan should turn on/off, etc, etc:  Dell, who made the computer, or some FREE 3rd party software program, fanGUI?  The answer is obvious.

I use fangui on my computer ONLY for monitoring my temperatures.  And this is not a "diss" to the program, as it has been tremendous help for me.

But I always say, IF YOU NEED A 3RD PARTY PROGRAM, RUNNING ON YOUR COMPUTER, IN ORDER FOR YOUR $1000+ COMPUTER TO WORK EFFECIENTLY, THAN YOUR COMPUTER HAS A PROBLEM, AND IF IT IS UNDER WARRANTY, DON'T BANDAID IT WITH 3RD PARTY PROGRAMS, RETURN IT TO THE DEPOT, AND HAVE THE FIX YOUR COMPUTER!

There is absolutely no need to have fanGUI "controlling" the fans on your computer.  NO NEED.  Because again, if there is a "need" because your computer gets too hot and you want the fans to run faster and longer to cool it, than most probably, there is a hardware problem with your computer.  RETURN IT TO BE FIXED!

Sorry for the caps.  But this always frustrates me.

cazint.

i hate to say this but what are you smoking. if that's the case as you say send it back to get it fixed there would be more laptops at the depot than with the owners. heat kills componets so fangui controls the fans to keep the heat of the laptop in check. now if your get in the 75c to 100c and you can't cool it down then yes there is a problem. this program has possable add a longer life to the customers laptop with no thanks to dell.

 

I don't smoke.  but that's another story.

and there being more laptops at the depot than with the owners is not my problem, that is the manufacturers.  And if customers started properly utilizing their warranties and holding the manufacturers accountable for making defective products, perhaps then the companies in question may start producing more reliable products.

yes, heat kills components.  and if one's computer is getting so hot that components could be killed, well, first off, this wouldn't happen as the computer would automatically shut down, but regardless, if one's computer is getting soooo hot that it shuts down automatically, then you have two choices: SEND IT BACK TO GET THE FAULTY HARDWARE FIXED, or, load some 3rd party software program to monitor the temps and to turn the fans on high earlier AND LONGER.  What should you do?  Please, the answer is, agian, obvious.

If the computer is overheating, THERE IS A HARDWARE ISSUE!  Period.  FIX THE HARDWARE.  Further, by not fixing the hardware which is causing the overheating, and by "bandaiding" the heat problem by making the fans work harder than they should, you are shotting yourself in the foot...TWICE.  Once by not getting the computer fixed in the first place.  And secondly, by the FACT that your fan, by now working much harder than it should, will have a much SHORTER life than normal, and will end up costing you money to replace it.

Man, boppo, if i were dell, i would love you as a customer, because i could basically make a garbage laptop, sell it to you, have it filled with problems, and you would have the mindset, "oh, let's not send it to dell and have the fix it, because they probably have too many computers to fix as it is, let's do this bandaid and that bandiad".  What foolishness is this???

If your computer has a problem, and if it is under warranty, GET IT FIXED.  we all appreciate users who want to fix stuff on their own.  Heck, I along with several other dell users, personally diagnosed the i5100 overheating problem as dust covering the heatsink.  dell wanted to replace motherboard, and this component and that component.  when in reality, it was dust.  So we appreciate one wanting to do-it-yourself.  BUT, if this do-it-yourself is going to end up hurting you, by leaving you with a faulty computer, and by then overusing your fan, it does not make sense.  At this stage, you NEED to get your computer fixed.  enough typing.

cazint.