diff --git a/homeassistant/components/shelly/number.py b/homeassistant/components/shelly/number.py
index c4420783bbb..1fc47b23bdb 100644
--- a/homeassistant/components/shelly/number.py
+++ b/homeassistant/components/shelly/number.py
@@ -139,6 +139,24 @@ class RpcBluTrvNumber(RpcNumber):
         )
 
 
+class RpcBluTrvExtTempNumber(RpcBluTrvNumber):
+    """Represent a RPC BluTrv External Temperature number."""
+
+    _reported_value: float | None = None
+
+    @property
+    def native_value(self) -> float | None:
+        """Return value of number."""
+        return self._reported_value
+
+    async def async_set_native_value(self, value: float) -> None:
+        """Change the value."""
+        await super().async_set_native_value(value)
+
+        self._reported_value = value
+        self.async_write_ha_state()
+
+
 NUMBERS: dict[tuple[str, str], BlockNumberDescription] = {
     ("device", "valvePos"): BlockNumberDescription(
         key="device|valvepos",
@@ -175,7 +193,7 @@ RPC_NUMBERS: Final = {
             "method": "Trv.SetExternalTemperature",
             "params": {"id": 0, "t_C": value},
         },
-        entity_class=RpcBluTrvNumber,
+        entity_class=RpcBluTrvExtTempNumber,
     ),
     "number": RpcNumberDescription(
         key="number",
diff --git a/tests/components/shelly/snapshots/test_number.ambr b/tests/components/shelly/snapshots/test_number.ambr
index 965d44698c2..811101abe21 100644
--- a/tests/components/shelly/snapshots/test_number.ambr
+++ b/tests/components/shelly/snapshots/test_number.ambr
@@ -52,7 +52,7 @@
     'last_changed': <ANY>,
     'last_reported': <ANY>,
     'last_updated': <ANY>,
-    'state': '15.2',
+    'state': 'unknown',
   })
 # ---
 # name: test_blu_trv_number_entity[number.trv_name_valve_position-entry]
diff --git a/tests/components/shelly/test_number.py b/tests/components/shelly/test_number.py
index 15ed098093b..b1b65d99ab5 100644
--- a/tests/components/shelly/test_number.py
+++ b/tests/components/shelly/test_number.py
@@ -417,24 +417,23 @@ async def test_blu_trv_number_entity(
         assert entry == snapshot(name=f"{entity_id}-entry")
 
 
-async def test_blu_trv_set_value(
-    hass: HomeAssistant,
-    mock_blu_trv: Mock,
-    monkeypatch: pytest.MonkeyPatch,
+async def test_blu_trv_ext_temp_set_value(
+    hass: HomeAssistant, mock_blu_trv: Mock
 ) -> None:
-    """Test the set value action for BLU TRV number entity."""
+    """Test the set value action for BLU TRV External Temperature number entity."""
     await init_integration(hass, 3, model=MODEL_BLU_GATEWAY_GEN3)
 
     entity_id = f"{NUMBER_DOMAIN}.trv_name_external_temperature"
 
-    assert hass.states.get(entity_id).state == "15.2"
+    # After HA start the state should be unknown because there was no previous external
+    # temperature report
+    assert hass.states.get(entity_id).state is STATE_UNKNOWN
 
-    monkeypatch.setitem(mock_blu_trv.status["blutrv:200"], "current_C", 22.2)
     await hass.services.async_call(
         NUMBER_DOMAIN,
         SERVICE_SET_VALUE,
         {
-            ATTR_ENTITY_ID: f"{NUMBER_DOMAIN}.trv_name_external_temperature",
+            ATTR_ENTITY_ID: entity_id,
             ATTR_VALUE: 22.2,
         },
         blocking=True,
@@ -451,3 +450,44 @@ async def test_blu_trv_set_value(
     )
 
     assert hass.states.get(entity_id).state == "22.2"
+
+
+async def test_blu_trv_valve_pos_set_value(
+    hass: HomeAssistant,
+    mock_blu_trv: Mock,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """Test the set value action for BLU TRV Valve Position number entity."""
+    # disable automatic temperature control to enable valve position entity
+    monkeypatch.setitem(mock_blu_trv.config["blutrv:200"], "enable", False)
+
+    await init_integration(hass, 3, model=MODEL_BLU_GATEWAY_GEN3)
+
+    entity_id = f"{NUMBER_DOMAIN}.trv_name_valve_position"
+
+    assert hass.states.get(entity_id).state == "0"
+
+    monkeypatch.setitem(mock_blu_trv.status["blutrv:200"], "pos", 20)
+    await hass.services.async_call(
+        NUMBER_DOMAIN,
+        SERVICE_SET_VALUE,
+        {
+            ATTR_ENTITY_ID: entity_id,
+            ATTR_VALUE: 20.0,
+        },
+        blocking=True,
+    )
+    mock_blu_trv.mock_update()
+    mock_blu_trv.call_rpc.assert_called_once_with(
+        "BluTRV.Call",
+        {
+            "id": 200,
+            "method": "Trv.SetPosition",
+            "params": {"id": 0, "pos": 20},
+        },
+        BLU_TRV_TIMEOUT,
+    )
+    # device only accepts int for 'pos' value
+    assert isinstance(mock_blu_trv.call_rpc.call_args[0][1]["params"]["pos"], int)
+
+    assert hass.states.get(entity_id).state == "20"