diff --git a/homeassistant/components/vicare/sensor.py b/homeassistant/components/vicare/sensor.py
index 864439c746c4..7825db7043ba 100644
--- a/homeassistant/components/vicare/sensor.py
+++ b/homeassistant/components/vicare/sensor.py
@@ -952,6 +952,15 @@ GLOBAL_SENSORS: tuple[ViCareSensorEntityDescription, ...] = (
         value_getter=lambda api: api.getFuelNeed(),
         unit_getter=lambda api: api.getFuelUnit(),
     ),
+    ViCareSensorEntityDescription(
+        key="hydraulic_separator_temperature",
+        translation_key="hydraulic_separator_temperature",
+        device_class=SensorDeviceClass.TEMPERATURE,
+        state_class=SensorStateClass.MEASUREMENT,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        native_unit_of_measurement=UnitOfTemperature.CELSIUS,
+        value_getter=lambda api: api.getHydraulicSeparatorTemperature(),
+    ),
 )
 
 CIRCUIT_SENSORS: tuple[ViCareSensorEntityDescription, ...] = (
diff --git a/homeassistant/components/vicare/strings.json b/homeassistant/components/vicare/strings.json
index 260b51f56f3f..99c78e262a65 100644
--- a/homeassistant/components/vicare/strings.json
+++ b/homeassistant/components/vicare/strings.json
@@ -293,6 +293,9 @@
       "energy_summary_dhw_consumption_heating_lastsevendays": {
         "name": "DHW electricity consumption last seven days"
       },
+      "hydraulic_separator_temperature": {
+        "name": "Hydraulic separator temperature"
+      },
       "power_consumption_today": {
         "name": "Electricity consumption today"
       },
diff --git a/tests/components/vicare/conftest.py b/tests/components/vicare/conftest.py
index 8e10d2f1a259..2608e4bbf64c 100644
--- a/tests/components/vicare/conftest.py
+++ b/tests/components/vicare/conftest.py
@@ -39,7 +39,9 @@ class MockPyViCare:
                         f"installation{idx}", f"gateway{idx}", f"device{idx}", fixture
                     ),
                     f"deviceId{idx}",
-                    f"model{idx}",
+                    "Vitovalor"
+                    if fixture.data_file.endswith("VitoValor.json")
+                    else f"model{idx}",
                     "online",
                 )
             )
diff --git a/tests/components/vicare/fixtures/VitoValor.json b/tests/components/vicare/fixtures/VitoValor.json
new file mode 100644
index 000000000000..07bed9faea50
--- /dev/null
+++ b/tests/components/vicare/fixtures/VitoValor.json
@@ -0,0 +1,26 @@
+{
+  "data": [
+    {
+      "apiVersion": 1,
+      "commands": {},
+      "deviceId": "0",
+      "feature": "heating.sensors.temperature.hydraulicSeparator",
+      "gatewayId": "################",
+      "isEnabled": true,
+      "isReady": true,
+      "properties": {
+        "status": {
+          "type": "string",
+          "value": "connected"
+        },
+        "value": {
+          "type": "number",
+          "unit": "celsius",
+          "value": 22.3
+        }
+      },
+      "timestamp": "2022-11-18T06:52:46.507Z",
+      "uri": "https://api.viessmann-climatesolutions.com/iot/v1/equipment/installations/#######/gateways/################/devices/0/features/heating.sensors.temperature.hydraulicSeparator"
+    }
+  ]
+}
diff --git a/tests/components/vicare/snapshots/test_sensor.ambr b/tests/components/vicare/snapshots/test_sensor.ambr
index 22cba704dcfa..6c21511a201a 100644
--- a/tests/components/vicare/snapshots/test_sensor.ambr
+++ b/tests/components/vicare/snapshots/test_sensor.ambr
@@ -1,4 +1,60 @@
 # serializer version: 1
+# name: test_all_entities[None-vicare/VitoValor.json][sensor.vitovalor_hydraulic_separator_temperature-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': dict({
+      'state_class': <SensorStateClass.MEASUREMENT: 'measurement'>,
+    }),
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
+    'entity_id': 'sensor.vitovalor_hydraulic_separator_temperature',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'options': dict({
+      'sensor': dict({
+        'suggested_display_precision': 1,
+      }),
+    }),
+    'original_device_class': <SensorDeviceClass.TEMPERATURE: 'temperature'>,
+    'original_icon': None,
+    'original_name': 'Hydraulic separator temperature',
+    'platform': 'vicare',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'hydraulic_separator_temperature',
+    'unique_id': 'gateway0_deviceId0-hydraulic_separator_temperature',
+    'unit_of_measurement': <UnitOfTemperature.CELSIUS: '°C'>,
+  })
+# ---
+# name: test_all_entities[None-vicare/VitoValor.json][sensor.vitovalor_hydraulic_separator_temperature-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'temperature',
+      'friendly_name': 'Vitovalor Hydraulic separator temperature',
+      'state_class': <SensorStateClass.MEASUREMENT: 'measurement'>,
+      'unit_of_measurement': <UnitOfTemperature.CELSIUS: '°C'>,
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.vitovalor_hydraulic_separator_temperature',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': '22.3',
+  })
+# ---
 # name: test_all_entities[type:boiler-vicare/Vitodens300W.json][sensor.model0_boiler_temperature-entry]
   EntityRegistryEntrySnapshot({
     'aliases': set({
diff --git a/tests/components/vicare/test_sensor.py b/tests/components/vicare/test_sensor.py
index be7418291a8a..ce2862120939 100644
--- a/tests/components/vicare/test_sensor.py
+++ b/tests/components/vicare/test_sensor.py
@@ -23,6 +23,7 @@ from tests.common import MockConfigEntry, snapshot_platform
         ("type:heatpump", "vicare/Vitocal250A.json"),
         ("type:ventilation", "vicare/ViAir300F.json"),
         ("type:ess", "vicare/VitoChargeVX3.json"),
+        (None, "vicare/VitoValor.json"),
     ],
 )
 async def test_all_entities(