Xavier's fan never work

My Xavier’s fan never work. Some one can tell me how to turn it on?

Could you run sudo jetson_clocks and see if it runs?

BTW, are you using devkit?

you can sun the jetson_clocks:

sudo ~/jetson_clocks

or maybe:

sudo /usr/bin/jetson_clocks

Do beware that the fan normally only runs if the Xavier heats up, and it rarely heats up if not given a load. The “jetson_clocks” mentioned above sets clocks to max and turns on the fan rather than letting it auto adjust.