Fan is not working

I just got and setup Jetson Nano. Everything is good except the fan I’m using is not working. It’s Noctua NF-A4x20 5V PWM. Any suggestion how to troubleshoot it?

Could it be that fan does not rotate until heat sink reaches certain temperature?

Hi vitali.fridman,

Easiest method to check your fan is working or not is as follows:

ON :
sudo sh -c ‘echo 255 > /sys/devices/pwm-fan/target_pwm’

OFF :
sudo sh -c ‘echo 0 > /sys/devices/pwm-fan/target_pwm’
(slowly turned off)

Also, Could you follow this post,
https://devtalk.nvidia.com/default/topic/1049589/jetson-nano/fan-not-working/

Please let me know if it works.

Thanks for quick reply! Using these commands fan works. My question is will it spin up automatically when Nano gets hot or do I have to add these into startup script. Thanks!

If you are running heavy loads, worth adding following two lines to your script.

sudo nvpmodel -m0 sudo jetson_clocks