diff --git a/custom_components/luxtronik/__init__.py b/custom_components/luxtronik/__init__.py
index 561db6f..cd816ef 100644
--- a/custom_components/luxtronik/__init__.py
+++ b/custom_components/luxtronik/__init__.py
@@ -60,12 +60,13 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 def setup_hass_services(hass: HomeAssistant, entry: ConfigEntry):
     """Home Assistant services."""
 
-    def write_parameter(service):
+    async def write_parameter(service):
         """Write a parameter to the Luxtronik heatpump."""
         parameter = service.data.get(ATTR_PARAMETER)
         value = service.data.get(ATTR_VALUE)
-        coordinator = LuxtronikCoordinator.connect(hass, entry)
-        coordinator.write(parameter, value)
+        data = hass.data[DOMAIN].get(entry.entry_id)
+        coordinator: LuxtronikCoordinator = data[CONF_COORDINATOR]
+        await coordinator.async_write(parameter, value)
 
     hass.services.register(
         DOMAIN, SERVICE_WRITE, write_parameter, schema=SERVICE_WRITE_SCHEMA
diff --git a/custom_components/luxtronik/manifest.json b/custom_components/luxtronik/manifest.json
index f2969b9..a8f1a21 100755
--- a/custom_components/luxtronik/manifest.json
+++ b/custom_components/luxtronik/manifest.json
@@ -9,7 +9,7 @@
   "after_dependencies": [],
   "codeowners": ["@BenPru"],
   "iot_class": "local_polling",
-  "version": "2023.11.29",
+  "version": "2023.11.30",
   "homeassistant": "2023.1.0",
   "dhcp": [
     { "macaddress": "000E8C*" },