Trigger when temperature change

Hi to all, I have this problem: I would like to save the value of the current temperature set point in a input_number field.
I think to use the automation future, but it does not trigger the change.

this is my script

#Temperatura di riferimento per Giroscale modificata
- id: 'MSPG'
  alias: Modifica set point Giroscale
  description: Temperatura di riferimento per Giroscale modificata
  trigger:
  - platform: template
    value_template: "{% if (state_attr('climate.temperatura_giroscale','temperature') != (states('input_number.temperatura_ideale_giroscale') | int)) %}true{% endif %}"  
  action:
    service: input_number.set_value
    data_template:
      entity_id: input_number.temperatura_ideale_giroscale
      value: "{{ state_attr('climate.temperatura_giroscale','temperature') }}"