Hi,

Common causes for fan running constantly can be due to: An out of date BIOS, obstructions in the fan or vent area, physical damage, dust accumulation in the fan or vent area, usage while not on a flat surface or proper ventilation clearance, using near a heat source or in a hot environment. Fan speed can increase or decrease due to the temperature of the system. I would recommend you to perform the following steps in order which should fix the issue:

1. Ensure if the BIOS is updated correctly to A11 or not. Boot your system in BIOS and check the version.
2. Change the Power Plan. Try changing it to “Balanced”. Click on Start and look for Control Panel. Once you click on Control Panel,a window would pop up. In this window please look for power option. Please click on Power option and change the battery setting to “Minimum”.
3. Check the air cooling vents and make sure that the passages are not clogged with lint and other stuff. Simply raising your laptop off any flat surface will allow fresh, cool air to come in from the intake on the bottom of the laptop. This solves many of the constant fan running issues you might have.

If the issue still persists, run the Hardware Diagnostics. In order to run Dell Diagnostics from Hard Drive, follow the below mentioned step

• Restart your computer.
• When the DELL™ logo appears, tap immediately.
• When the boot device list appears, highlight Boot to Utility Partition and press .
• When Dell Diagnostics Main Menu appears (see Dell Diagnostics Main Menu), select the extended test. If you get any error code, reply with the error code.

You can even refer to the Article ID: 428053 on http://support.dell.com/

My laptop is only 2 months old, so i don't thing anything is clogged yet. And when I wrote about the issue, I was using laptop on the table. I also ran Diagnostics utility fan test, they performed fine.

Hi,

I am going to send you a private message and once you receive it, please provide the Service Tag and contact number, so that I may access to your system records. Please do not share your Service Tag in the open forum.

My protsessor also idles around 55C and fan kicks in after few degrees up.

Hi  DELL-Deb B,

I have the same issue with laptop fan but for vostro 3560 dell even sent me replacement heat sink that did not help at all using bios A11,air condition room temp at 24 degrs,laptop placed on table,this issue does happen at odd timing. right from day one of use.Diagnostic test shows everything fine.some times 47-50 degrs  fan is within the rotating speed & some time even at 47-50 degrs with cpu utilization of 2% the fan is at max speed which causes lot of noise.

Dell says its not known issue when so many customer already facing the issue,no fix yet from dell

My 3450 does the same. Computer sits idle and is placed on the table. Fan randomly turns on at full speed, even though computer is not used.  

You may have a look at the screen shot ,In both the cases screen shot the laptop was placed in the air condition room temp of 24degrs C.Even after heat sink had the same issue with the laptop..no fix yet form dell.as its considered as " NOT KNOWN ISSUE " 
under Licence Windows 7

When using the laptop suddenly the fan speeds at max speed as you see in the pic below.


When using the laptop

 
 

As Dolnor already stated, this doesnt seem to be hardware issue. I have the same issues with the 15 R SE. At at certain temperature the fan speed increases rapidly from 2800 to around 3500-3900 rpm (although it`s not an abnormal speed. I think the fan can go up 5500 -5800 rpm max). It`s very likely the BIOs temperature tables have to adjusted.

I think they used these settings, so that device never gets too hot. I noticed that my laptop never  is too hot at the bottom, not even after playing 5 h  a game which needs a lot of resources.

I purchase a Vostro 3560 20 days ago and the fan noise is driving me crazy!!

pretty much it stays on all the time and when it stops (which is a great relief) only stops for 40 seconds.

Even when the computer is idle.

This is something I'm experiencing as well.  Vostro 3560.  A13 BIOS.  All the latest drivers (did y'all notice all the new ones this month?!?)  I read in this thread that the HDD may be the culprit.  I've upgraded to an SSD (Windows 7 x64 fresh install) as I've heard they run cooler, a Samsung 840 Pro.  Still get the fans kicking on max speed for no reason, even when at idle.  Ambient room temperature is 73º F.  Average CPU die temp is between 42-47º C.  I've purchased a laptop cooler to place underneath the laptop thinking maybe the HDD bay was still getting warm.  Even with the fan speed on the laptop cooler cranked all the way up, the laptops fan still kicks into high speed over and over and over, all day throughout my work day.  Whats sad is that the air the fan is kicking out isn't even warm.  It's completely cool!  This problem is so annoying it distracts me from my work.  PLEASE FIX THIS DELL!!!!