diff --git a/ha-smart-thermostat-control.yaml b/ha-smart-thermostat-control.yaml
index c8e944f..e048295 100644
--- a/ha-smart-thermostat-control.yaml
+++ b/ha-smart-thermostat-control.yaml
@@ -120,6 +120,17 @@ blueprint:
           max: 0.0
           unit_of_measurement: minutes
           step: 30.0
+    sync_delay:
+      name: Manual Sync Delay
+      description: 'Delay before syncing manual temperature changes to prevent cascade loops. (Default = 3s)'
+      default: 3
+      selector:
+        number:
+          mode: box
+          min: 1.0
+          max: 10.0
+          unit_of_measurement: seconds
+          step: 1.0
 
 trigger:
   - platform: state
@@ -146,6 +157,8 @@ trigger:
     entity_id: !input thermostat
     attribute: temperature
     id: manual_adjustment
+    for:
+      seconds: !input sync_delay
   - platform: calendar
     event: end
     entity_id: !input away_calendar
@@ -164,6 +177,9 @@ trigger:
 
 variables:
   thermostat_entities: !input thermostat
+  triggered_thermostat: "{{ trigger.entity_id }}"
+  new_temperature: "{{ trigger.to_state.attributes.temperature | float(0) }}"
+  old_temperature: "{{ trigger.from_state.attributes.temperature | float(0) }}"
 
 condition: []
 
@@ -173,20 +189,39 @@ action:
       - conditions:
           - condition: trigger
             id: manual_adjustment
-          # Prevent triggering on automation's own changes
+          # Only sync if the temperature actually changed
+          - condition: template
+            value_template: "{{ (new_temperature - old_temperature) | abs > 0.1 }}"
+          # Check that other thermostats need syncing (have different temps)
           - condition: template
             value_template: >
-              {{ (now() - trigger.from_state.last_changed).total_seconds() > 10 }}
+              {% set other_thermostats = thermostat_entities | reject('eq', triggered_thermostat) | list %}
+              {% if other_thermostats | length > 0 %}
+                {% set needs_sync = namespace(value=false) %}
+                {% for thermo in other_thermostats %}
+                  {% set thermo_temp = state_attr(thermo, 'temperature') | float(0) %}
+                  {% if (thermo_temp - new_temperature) | abs > 0.1 %}
+                    {% set needs_sync.value = true %}
+                  {% endif %}
+                {% endfor %}
+                {{ needs_sync.value }}
+              {% else %}
+                false
+              {% endif %}
         sequence:
-          - service: climate.set_temperature
-            target:
-              entity_id: !input thermostat
-            data:
-              temperature: "{{ trigger.to_state.attributes.temperature }}"
+          # Only sync to OTHER thermostats (not the one that triggered)
+          - repeat:
+              for_each: "{{ thermostat_entities | reject('eq', triggered_thermostat) | list }}"
+              sequence:
+                - service: climate.set_temperature
+                  target:
+                    entity_id: "{{ repeat.item }}"
+                  data:
+                    temperature: "{{ new_temperature }}"
           - service: logbook.log
             data:
               name: Smart Thermostat
-              message: 'Manual Adjustment: All thermostats synced to {{ trigger.to_state.attributes.temperature }}°'
+              message: 'Manual Adjustment: {{ triggered_thermostat }} changed to {{ new_temperature }}°, syncing to other thermostats'
 
       # Priority 1: Windows/Doors Open - Turn OFF heating
       - conditions: