diff --git a/homeassistant/components/samsungtv/media_player.py b/homeassistant/components/samsungtv/media_player.py
index cc3ca5f142e65..fa4f04a97ec93 100644
--- a/homeassistant/components/samsungtv/media_player.py
+++ b/homeassistant/components/samsungtv/media_player.py
@@ -386,4 +386,8 @@ async def async_select_source(self, source: str) -> None:
             await self._async_send_keys([SOURCES[source]])
             return
 
-        LOGGER.error("Unsupported source")
+        raise HomeAssistantError(
+            translation_domain=DOMAIN,
+            translation_key="source_unsupported",
+            translation_placeholders={"entity": self.entity_id, "source": source},
+        )
diff --git a/homeassistant/components/samsungtv/strings.json b/homeassistant/components/samsungtv/strings.json
index fc3be3fcc1903..17fde5db5bfae 100644
--- a/homeassistant/components/samsungtv/strings.json
+++ b/homeassistant/components/samsungtv/strings.json
@@ -68,6 +68,9 @@
     "service_unsupported": {
       "message": "Entity {entity} does not support this action."
     },
+    "source_unsupported": {
+      "message": "Entity {entity} does not support source {source}."
+    },
     "error_set_volume": {
       "message": "Unable to set volume level on {host}: {error}"
     },
diff --git a/tests/components/samsungtv/test_media_player.py b/tests/components/samsungtv/test_media_player.py
index 7dc5c6489d822..d36ff8daeb3b7 100644
--- a/tests/components/samsungtv/test_media_player.py
+++ b/tests/components/samsungtv/test_media_player.py
@@ -1105,17 +1105,27 @@ async def test_select_source(hass: HomeAssistant, remote: Mock) -> None:
 
 async def test_select_source_invalid_source(hass: HomeAssistant) -> None:
     """Test for select_source with invalid source."""
+
+    source = "INVALID"
+
     with patch("homeassistant.components.samsungtv.bridge.Remote") as remote:
         await setup_samsungtv_entry(hass, MOCK_CONFIG)
         remote.reset_mock()
-        await hass.services.async_call(
-            MP_DOMAIN,
-            SERVICE_SELECT_SOURCE,
-            {ATTR_ENTITY_ID: ENTITY_ID, ATTR_INPUT_SOURCE: "INVALID"},
-            True,
-        )
+        with pytest.raises(HomeAssistantError) as exc_info:
+            await hass.services.async_call(
+                MP_DOMAIN,
+                SERVICE_SELECT_SOURCE,
+                {ATTR_ENTITY_ID: ENTITY_ID, ATTR_INPUT_SOURCE: source},
+                True,
+            )
         # control not called
         assert remote.control.call_count == 0
+        assert exc_info.value.translation_domain == DOMAIN
+        assert exc_info.value.translation_key == "source_unsupported"
+        assert exc_info.value.translation_placeholders == {
+            "entity": ENTITY_ID,
+            "source": source,
+        }
 
 
 @pytest.mark.usefixtures("rest_api")