MacBook Pro fan always on I noticed that for the past few days my MacBook Pro has been running the fan non-stop. I dont know if this is a problem, should I be worried? Is this something that I can solve on my own? Should I bring it into the Apple store?
If it is the same as mine, it was fixed by:


Opening Activity Monitor and see if any background processes are running.
If there are, then quit them.
If that didn't work, you might need to do a SMC. System Management Controller reset. 


To reset the SMC:

Shut down the computer.

Plug in the MagSafe or USB-C power adapter to a power source and to your computer.

On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.

Release all the keys and the power button at the same time.

Press the power button to turn on the computer.

On MagSafe power adapters, the LED might change states or temporarily turn off when you reset the SMC.

To read more about troubleshooting the fan read this: https://support.apple.com/en-ca/HT201295