My fan is running at full power continuously

MY fan is running at full power continously, help what can i do
Andsre

You need to reset the SMC:
Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
Hope this helps

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