diff --git a/blueprints/danfoss_ally_trv_external_sensor.yaml b/blueprints/danfoss_ally_trv_external_sensor.yaml
index 1749e60..80842cf 100644
--- a/blueprints/danfoss_ally_trv_external_sensor.yaml
+++ b/blueprints/danfoss_ally_trv_external_sensor.yaml
@@ -1,13 +1,12 @@
----
 blueprint:
   author: runejuhl
   homeassistant:
-    min_version: 2024.6.0
-  name: Radiator external temperature sensor control (0.0.1-alpha)
+    min_version: 2025.2.4
+  name: Radiator external temperature sensor control (0.0.2-alpha)
   description: |-
     ## Radiator external temperature sensor control
 
-    Version `0.0.1-alpha`.
+    Version `0.0.2-alpha`.
 
     Sets the `external_measured_room_sensor` value on Danfoss Ally TRV, enabling
     the TRV to adjust the valve based on an external sensor.
@@ -20,15 +19,17 @@ blueprint:
       selector:
         entity:
           filter:
-            - domain: climate
+          - domain:
+            - climate
+          multiple: false
     climate_sensor:
       name: Climate sensor temperature entity
       selector:
         entity:
           filter:
-            - device_class:
-              - temperature
-
+          - device_class:
+            - temperature
+          multiple: false
 mode: queued
 
 variables:
@@ -36,45 +37,44 @@ variables:
   temperature_entity: !input climate_sensor
 
 triggers:
-  - entity_id: !input climate_sensor
-    attribute: temperature
-    trigger: state
+- entity_id: !input climate_sensor
+  trigger: state
 
 conditions:
-  # We only want to execute the action if the temperature has changed by at
-  # least 0.1 degress C, according to the Zigbee2MQTT documentation for the
-  # device: https://www.zigbee2mqtt.io/devices/014G2461.html
-  #
-  # `external_measured_room_sensor` defaults to `-8000`, so this will work in
-  # all cases.
-  - condition: template
-    value_template: >-
-      {{
-        (
-         (
-          state_attr(climate_entity, 'external_measured_room_sensor') -
-           trigger.to_state.attributes.temperature * 100)
-          | abs)
-        >= 10
-      }}
+# We only want to execute the action if the temperature has changed by at least
+# 0.1 degress C, according to the Zigbee2MQTT documentation for the device:
+# https://www.zigbee2mqtt.io/devices/014G2461.html
+#
+# `external_measured_room_sensor` defaults to `-8000`, so this will work in all
+# cases.
+- condition: template
+  value_template: |-
+    {% if state_attr(climate_entity, 'external_measured_room_sensor') == None %}
+    True
+    {% else %}
+    {{
+      ( (state_attr(climate_entity, 'external_measured_room_sensor')
+         - (trigger.to_state.state | float) * 100) | abs)
+      >= 10
+    }}
+    {% endif %}
 
 actions:
-  - variables:
-      # If we don't have a trigger ID the automation has been run manually, in
-      # which case we pull the temperature from the sensor instead of the
-      # trigger state.
-      external_temperature: >-
-        {% if trigger.id is not defined %}
-        {{ state_attr(temperature_entity, 'temperature') }}
-        {% else %}
-        {{ trigger.to_state.attributes.temperature }}
-        {% endif %}
-  - action: number.set_value
-    target:
-      entity_id: |-
-        number.{{ states[climate_entity].object_id }}_external_measured_room_sensor
-    data:
-      value: >-
-        {{
-          (external_temperature * 100) | int
-        }}
+- variables:
+    # If we don't have a trigger ID the automation has been run manually, in
+    # which case we pull the temperature from the sensor instead of the trigger
+    # state.
+    external_temperature: |-
+      {% if trigger.id is not defined %}
+      {{ state_attr(temperature_entity, 'temperature') }}
+      {% else %}
+      {{ trigger.to_state.state | float }}
+      {% endif %}
+- action: number.set_value
+  target:
+    entity_id: number.{{ states[climate_entity].object_id }}_external_measured_room_sensor
+  data:
+    value: |-
+      {{
+        (external_temperature * 100) | int
+      }}