HELP- mac mini fan just sped up to 5500 RPM

mac mini fan just sped up to 5500 RPM
temps are normal though, no overload to system.

The first thing I would try is to perform an SMC reset on the system:
-From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
-Unplug all cables from the computer, including the power cord and any display cables.
-Wait at least 15 seconds.
-Plug the power cord back in, +making sure the power button is not being pressed at the time.+
-Then reconnect your keyboard and mouse to the computer.
-Press the power button on the back to start up your computer.
If the fan continues to run at full speed after that, does it do so right from power on, or on;y after the system has been running a few minutes?

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    Mar 11 00:12:18 unknown-28-cf-e9-04-d0-45 kernel[0] <Debug>: AppleThunderboltHAL::earlyWake - complete - took 1011 milliseconds
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    Mar 11 00:43:11 Alexs-Mac-Mini kernel[0] <Debug>: AppleThunderboltHAL::earlyWake - complete - took 1016 milliseconds
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