Can anyone tell me how to turn on my computer without the fan going on? It now only runs with the fan on.

my mac shut down without warning and then when I turned it back on the fan came on, now the fan will not go off. The computer is fine otherwise.
Can someone please tell me what I can do when I re boot it to have the fan go off. It did this twice before when it was under apple care.Thanks so much!!!

Bridget,
Try doing a SMC reset, please read the instructions carefully. If it does not work the first time do it 2-3x.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

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