Thanks for posting.
Apologies that your system isn't running as expected.
Here is some information you may find helpful: www.dell.com/.../troubleshooting-fan-noise
Please run a systems diagnostics by pressing F 12 at startup or run Support Assist, make a note of any errors encountered, and give Tech Support a call to further troubleshoot. You can contact Tech Support at 1-800-624-9896 or 1-800-288-4410, or you can initiate a chat session http://dell.to/2v4snVm
The machine is out of support and the support I have gotten on this laptop has been crazy bad. I have had many Dell machines that were/are top notch, but not this one.
Out of warranty services should be able to assist you. www.dell.com/.../how-to-arrange-out-of-warranty-repair-on-your-dell-system