How to Turn Off a MacBook Fan

Shut down your MacBook and disconnect the power supply.
Remove the battery from the bottom of your MacBook.
Press the power button and hold it for five seconds. Reconnect the power supply.
Press the power button again to boot up the MacBook and see if the fan issue has resolved.
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How to Increase Memory in a Macbook (5 Steps)

Turn the computer over so that you can see the screws around the perimeter of the bottom of the computer. Remove them using the phillips-head screwdriver, then place them to the side. There are two different length screws, so make sure you keep them separate and note which ones go where.
Lift the bottom of the case off of the laptop at the vents near the back of the case, which will also release the two clips which hold it in place. Set the bottom of the case to the side.
Locate the ram in the computer. This is on the left side, just below a fan, and is about two to three inches wide. Push the tabs on either side of the ram away from the ram chip itself, which will pop up the ram. Pull the ram straight out of the socket. If you're installing two ram chips, repeat the process for the second layer of ram just underneath the first.
Push the replacement ram into the socket and push the clips onto the sides of the ram. Repeat this process with the additional piece of ram if you are installing it as well.
Place the bottom cover back onto the computer and reinstall the screws using the phillips-head screwdriver. Turn on the computer. If the ram is not installed correctly, you will get an error message right off the bat, so go back in and double check to make sure that it's installed firmly in the socket.
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