diff --git a/packages/climate.yaml b/packages/climate.yaml
index 61a52ba..703b491 100644
--- a/packages/climate.yaml
+++ b/packages/climate.yaml
@@ -31,12 +31,7 @@ sensor:
           {% else %}
             mdi:home-lightning-bolt-outline
           {% endif %}
-        availability_template: >-
-          {% if is_state('input_boolean.master_bedroom_aircon_installed','on') %}
-            true
-          {% else %}
-            false
-          {% endif %}
+        availability_template: "{{ states('climate.master_bedroom_aircon') not in ['unavailable','unknown'] }}"
       master_bedroom_aircon_fan_mode:
         friendly_name: "Master Bedroom Aircon Fan Mode"
         value_template: >