On and off switch for Heat Control thermostat

Feature Requests
1

This feature request might be for all thermostats, but I only have the Heat Control so I don’t know for the rest.
I would like to have a switch to turn the thermostat on and off.

2

Have you try with an input_boolean ?
in adding this input_boolean in automations like this example

in configuration.yaml

input_boolean:
  cast_light:
    name: Chromecast lumieres
    initial: on
    icon: mdi:spotlight-beam

and in automations.yaml

  - alias: "Chromecast paused/stopped"
    trigger:
      - platform: state
        entity_id: media_player.chromecast2
        from: 'playing'
    condition:
      - condition: state
        entity_id: input_boolean.cast_light
        state: 'on'
    action:
        service: scene.turn_on
        entity_id: scene.Allume

the scene Allume turn on only if the switch “cast_light” is on …