Hi,   To my side, below work in root but not with systemd service:   # Helios64 PWM Fan Control Configuration # Temp source : /dev/thermal-cpu #INTERVAL=10 INTERVAL=30 FCTEMPS=/dev/fan-p6/pwm1=/dev/thermal-cpu/temp1_input /dev/fan-p7/pwm1=/dev/thermal-cpu/temp1_input MINTEMP=/dev/fan-p6/pwm1=40 /dev/fan-p7/pwm1=40 MAXTEMP=/dev/fan-p6/pwm1=50 /dev/fan-p7/pwm1=50 MINSTART=/dev/fan-p6/pwm1=20 /dev/fan-p7/pwm1=20 MINSTOP=/dev/fan-p6/pwm1=20 /dev/fan-p7/pwm1=20 M