CRS328-24P-4S+RM - health command will not work

FW: RouterOS 6.43.8

on terminal i use following command:

/system health print
cpu-temperature: 39C
power-consumption: 18.5W
board-temperature1: 29C
psu1-voltage: 26.5V
psu2-voltage: 52.7V
psu1-current: 0A
psu2-current: 0.3A
fan1-speed: 4440RPM
fan2-speed: 4500RPM
THIS WORKS FINE

/system health get cpu-temperature
[admin@SW2p] >
NO OUTPUT??

please can you help me?

Where do you think you are GETting this value to?
Have you read the script language manual?
If you want to display a value you need to use the :put command

:put [/system health get cpu-temperature]

thx for help,

I am looking for how to program the fan to turn off at 40 ° and turn on again at 50 °.
Do you have an idea about this?