Ok, now I know why. without the +1 the automation does not trigger when the temperature is over the target and the TRVs running on idle. The +1 triggers the automation and switches them off until the room temperature is under the target temperature. So it does not explain why the mode is switched from heat to off or the other way around in the target +1° range.

Thank you. I will look at it

I was young and… I don’t know why I used it a few years ago. I will try your suggestion.

I use the generic thermostat but I want to switch the TRVs to different temperatures/states depending on a schedule and if we are at home or not. The automation changed over the last 3 or 4 years but basicly it was one of my first experiments with HA. It worked flawless and did what it should.

Maybe it’s not the best or refined but it worked.

triggers:
  - entity_id:
      - sensor.wohnzimmer_temp
    trigger: state
conditions:
  - condition: and
    conditions:
      - condition: state
        state: "off"
        entity_id: binary_sensor.balkontur_contact
      - condition: state
        entity_id: input_boolean.wohnzimmer_heizung
        state: "on"
      - condition: template
        value_template: >-
          {% if states('input_boolean.away_mode')=='off' %} {% if
          states('schedule.testkalender')=='on' %} {{
          states('sensor.wohnzimmer_temp') | float <
          states('input_number.wohnzimmer_temperatur_tag') | float + 1 }} {%
          else %} {{ states('sensor.wohnzimmer_temp') | float <
          states('input_number.wohnzimmer_temperatur_nacht') | float + 1 }} {%
          endif %} {% else %} {{ (states('sensor.wohnzimmer_temp') | float) |
          round  < states('input_number.temperatur_away_mode') | float + 1 }} {%
          endif %}
        enabled: true
actions:
  - action: climate.set_temperature
    target:
      entity_id: climate.heizung_wohnzimmer
    data:
      temperature: |
        {% if states('schedule.testkalender')=='on' %}
          {{ states('input_number.wohnzimmer_temperatur_tag') | int + states('input_number.wohnzimmer_heizung_offset') | int }}
        {% else %}
          {{ states('input_number.wohnzimmer_temperatur_nacht') | int }}
        {% endif %}
      hvac_mode: |
        {% if states('input_boolean.away_mode')=='off' %}
          {% if states('schedule.testkalender')=='on' %}
            {% if states('sensor.wohnzimmer_temp') | float < states('input_number.wohnzimmer_temperatur_tag') | float %}
              heat
            {% else %}
              off
            {% endif %}
          {% else %}
            {% if states('sensor.wohnzimmer_temp') | float < states('input_number.wohnzimmer_temperatur_nacht') | float %}
              heat
            {% else %}
              off
            {% endif %}
          {% endif %}
        {% else %}
          {% if states('sensor.wohnzimmer_temp') | float < states('input_number.temperatur_away_mode') | float %}
            heat
          {% else %}
            off
          {% endif %}
        {% endif %}       
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