diff --git a/homeassistant/components/knx/binary_sensor.py b/homeassistant/components/knx/binary_sensor.py
index 1fcaa7d6a30a..e76b5d3772cb 100644
--- a/homeassistant/components/knx/binary_sensor.py
+++ b/homeassistant/components/knx/binary_sensor.py
@@ -68,9 +68,7 @@ async def async_setup_entry(
             KnxYamlBinarySensor(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(
-        Platform.BINARY_SENSOR
-    ):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.BINARY_SENSOR):
         entities.extend(
             KnxUiBinarySensor(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/button.py b/homeassistant/components/knx/button.py
index ae29fc8fc4d2..1ed7978ba5b6 100644
--- a/homeassistant/components/knx/button.py
+++ b/homeassistant/components/knx/button.py
@@ -49,7 +49,7 @@ async def async_setup_entry(
             KnxYamlButton(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.BUTTON):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.BUTTON):
         entities.extend(
             KnxUiButton(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/climate.py b/homeassistant/components/knx/climate.py
index 543f7196fb68..37b6f0aeabd5 100644
--- a/homeassistant/components/knx/climate.py
+++ b/homeassistant/components/knx/climate.py
@@ -103,7 +103,7 @@ async def async_setup_entry(
             KnxYamlClimate(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.CLIMATE):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.CLIMATE):
         entities.extend(
             KnxUiClimate(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/const.py b/homeassistant/components/knx/const.py
index 54b3df8805e9..66bbcc850f4b 100644
--- a/homeassistant/components/knx/const.py
+++ b/homeassistant/components/knx/const.py
@@ -124,6 +124,7 @@ SERVICE_KNX_EXPOSURE_REGISTER: Final = "exposure_register"
 SERVICE_KNX_READ: Final = "read"
 
 REPAIR_ISSUE_DATA_SECURE_GROUP_KEY: Final = "data_secure_group_key_issue"
+REPAIR_ISSUE_ENTITY_VALIDATION_ERROR: Final = "entity_validation_error"
 REPAIR_ISSUE_TELEGRAM_BACKEND_ERROR: Final = "telegram_backend_error"
 
 
diff --git a/homeassistant/components/knx/cover.py b/homeassistant/components/knx/cover.py
index 22fee8301277..9270e4e2b8ce 100644
--- a/homeassistant/components/knx/cover.py
+++ b/homeassistant/components/knx/cover.py
@@ -74,7 +74,7 @@ async def async_setup_entry(
             KnxYamlCover(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.COVER):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.COVER):
         entities.extend(
             KnxUiCover(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/date.py b/homeassistant/components/knx/date.py
index 9fa40c87b14b..e6996d570a9a 100644
--- a/homeassistant/components/knx/date.py
+++ b/homeassistant/components/knx/date.py
@@ -59,7 +59,7 @@ async def async_setup_entry(
             KnxYamlDate(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.DATE):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.DATE):
         entities.extend(
             KnxUiDate(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/datetime.py b/homeassistant/components/knx/datetime.py
index f73735e635bc..0b7964cd61c3 100644
--- a/homeassistant/components/knx/datetime.py
+++ b/homeassistant/components/knx/datetime.py
@@ -60,7 +60,7 @@ async def async_setup_entry(
             KnxYamlDateTime(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.DATETIME):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.DATETIME):
         entities.extend(
             KnxUiDateTime(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/entity.py b/homeassistant/components/knx/entity.py
index 187c890590ce..37571cfd9528 100644
--- a/homeassistant/components/knx/entity.py
+++ b/homeassistant/components/knx/entity.py
@@ -14,7 +14,6 @@ from homeassistant.const import (
     CONF_ID,
     CONF_NAME,
     CONF_UNIQUE_ID,
-    EntityCategory,
 )
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import entity_registry as er
@@ -267,7 +266,6 @@ class KnxUiEntity(_KnxEntityBase):
 
         self._attr_name = entity_config[CONF_NAME]
         self._attr_unique_id = unique_id
-        if entity_category := entity_config.get(CONF_ENTITY_CATEGORY):
-            self._attr_entity_category = EntityCategory(entity_category)
-        if device_info := entity_config.get(CONF_DEVICE_INFO):
+        self._attr_entity_category = entity_config[CONF_ENTITY_CATEGORY]
+        if device_info := entity_config[CONF_DEVICE_INFO]:
             self._attr_device_info = DeviceInfo(identifiers={(DOMAIN, device_info)})
diff --git a/homeassistant/components/knx/fan.py b/homeassistant/components/knx/fan.py
index d288465380b2..36acb2d35fac 100644
--- a/homeassistant/components/knx/fan.py
+++ b/homeassistant/components/knx/fan.py
@@ -122,7 +122,7 @@ async def async_setup_entry(
             KnxYamlFan(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.FAN):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.FAN):
         entities.extend(
             KnxUiFan(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/light.py b/homeassistant/components/knx/light.py
index 353796ae2307..fa4455b7cd09 100644
--- a/homeassistant/components/knx/light.py
+++ b/homeassistant/components/knx/light.py
@@ -83,7 +83,7 @@ async def async_setup_entry(
             KnxYamlLight(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.LIGHT):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.LIGHT):
         entities.extend(
             KnxUiLight(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/notify.py b/homeassistant/components/knx/notify.py
index 039de497a55f..96e5ba7c1375 100644
--- a/homeassistant/components/knx/notify.py
+++ b/homeassistant/components/knx/notify.py
@@ -49,7 +49,7 @@ async def async_setup_entry(
             KnxYamlNotify(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.NOTIFY):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.NOTIFY):
         entities.extend(
             KnxUiNotify(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/number.py b/homeassistant/components/knx/number.py
index 0a1ed401563a..3f679243342f 100644
--- a/homeassistant/components/knx/number.py
+++ b/homeassistant/components/knx/number.py
@@ -68,7 +68,7 @@ async def async_setup_entry(
             KnxYamlNumber(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.NUMBER):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.NUMBER):
         entities.extend(
             KnxUiNumber(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/repairs.py b/homeassistant/components/knx/repairs.py
index cba639cd5132..4a3b90e4becd 100644
--- a/homeassistant/components/knx/repairs.py
+++ b/homeassistant/components/knx/repairs.py
@@ -2,6 +2,7 @@
 
 from collections.abc import Callable
 from functools import partial
+import logging
 from typing import TYPE_CHECKING, Any, Final
 
 import voluptuous as vol
@@ -9,6 +10,7 @@ from xknx.exceptions.exception import InvalidSecureConfiguration
 from xknx.telegram import GroupAddress, IndividualAddress, Telegram
 
 from homeassistant.components.repairs import RepairsFlow, RepairsFlowResult
+from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import issue_registry as ir, selector
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
@@ -21,12 +23,15 @@ from .const import (
     CONF_KNX_KNXKEY_PASSWORD,
     DOMAIN,
     REPAIR_ISSUE_DATA_SECURE_GROUP_KEY,
+    REPAIR_ISSUE_ENTITY_VALIDATION_ERROR,
     REPAIR_ISSUE_TELEGRAM_BACKEND_ERROR,
     SIGNAL_KNX_DATA_SECURE_ISSUE_TELEGRAM,
     KNXConfigEntryData,
 )
 from .storage.keyring import DEFAULT_KNX_KEYRING_FILENAME, save_uploaded_knxkeys_file
 
+_LOGGER = logging.getLogger(__name__)
+
 CONF_KEYRING_FILE: Final = "knxkeys_file"
 
 
@@ -43,6 +48,35 @@ async def async_create_fix_flow(
     raise ValueError(f"unknown repair {issue_id}")
 
 
+###########################
+# Entity store schema issue
+###########################
+
+
+@callback
+def async_create_entity_validation_issue(
+    hass: HomeAssistant, platform: Platform, unique_ids: list[str]
+) -> None:
+    """Create a repair issue for invalid entity configurations in the config store."""
+    _LOGGER.error(
+        "Invalid KNX %s configuration in storage. These entities were not set up: %s",
+        platform,
+        ", ".join(unique_ids),
+    )
+    ir.async_create_issue(
+        hass,
+        DOMAIN,
+        f"{REPAIR_ISSUE_ENTITY_VALIDATION_ERROR}_{platform}",
+        is_fixable=False,
+        severity=ir.IssueSeverity.ERROR,
+        translation_key=REPAIR_ISSUE_ENTITY_VALIDATION_ERROR,
+        translation_placeholders={
+            "platform": platform,
+            "entities": "\n".join(f"- {unique_id}" for unique_id in unique_ids),
+        },
+    )
+
+
 ######################
 # DataSecure key issue
 ######################
diff --git a/homeassistant/components/knx/scene.py b/homeassistant/components/knx/scene.py
index 10012540c2ca..ef95fec8dffb 100644
--- a/homeassistant/components/knx/scene.py
+++ b/homeassistant/components/knx/scene.py
@@ -51,7 +51,7 @@ async def async_setup_entry(
             KnxYamlScene(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.SCENE):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.SCENE):
         entities.extend(
             KnxUiScene(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/select.py b/homeassistant/components/knx/select.py
index b46b8295ac30..350eb23495b3 100644
--- a/homeassistant/components/knx/select.py
+++ b/homeassistant/components/knx/select.py
@@ -71,7 +71,7 @@ async def async_setup_entry(
             KnxYamlSelect(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.SELECT):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.SELECT):
         entities.extend(
             KnxUiSelect(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/sensor.py b/homeassistant/components/knx/sensor.py
index ba7f8b3fd9d2..f65922a99fdf 100644
--- a/homeassistant/components/knx/sensor.py
+++ b/homeassistant/components/knx/sensor.py
@@ -156,7 +156,7 @@ async def async_setup_entry(
             KnxYamlSensor(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.SENSOR):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.SENSOR):
         entities.extend(
             KnxUiSensor(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/storage/config_store.py b/homeassistant/components/knx/storage/config_store.py
index 2c8a19c54b12..2b1da7940313 100644
--- a/homeassistant/components/knx/storage/config_store.py
+++ b/homeassistant/components/knx/storage/config_store.py
@@ -12,8 +12,13 @@ from homeassistant.helpers.storage import Store
 from homeassistant.util.ulid import ulid_now
 
 from ..const import DOMAIN, KNX_MODULE_KEY
+from ..repairs import async_create_entity_validation_issue
 from . import migration
 from .const import CONF_DATA
+from .entity_store_validation import (
+    EntityStoreValidationException,
+    validate_entity_data,
+)
 from .expose_controller import KNXExposeStoreConfigModel, KNXExposeStoreModel
 from .time_server import KNXTimeServerStoreModel
 
@@ -118,6 +123,28 @@ class KNXConfigStore:
         """Add platform controller."""
         self._platform_controllers[platform] = controller
 
+    @callback
+    def get_entity_configs(self, platform: Platform) -> KNXPlatformStoreModel:
+        """Return validated entity configurations for a platform.
+
+        Invalid configurations are reported as a repair issue and stay in
+        `self.data` so they aren't dropped from storage.
+        """
+        validated: KNXPlatformStoreModel = {}
+        invalid: list[str] = []
+        for unique_id, config in self.data["entities"].get(platform, {}).items():
+            try:
+                result = validate_entity_data(
+                    {CONF_PLATFORM: platform, CONF_DATA: config}
+                )
+            except EntityStoreValidationException:
+                invalid.append(unique_id)
+            else:
+                validated[unique_id] = result[CONF_DATA]
+        if invalid:
+            async_create_entity_validation_issue(self.hass, platform, invalid)
+        return validated
+
     async def create_entity(
         self, platform: Platform, data: dict[str, Any]
     ) -> str | None:
diff --git a/homeassistant/components/knx/storage/entity_store_schema.py b/homeassistant/components/knx/storage/entity_store_schema.py
index 23abcc612e9b..bfbc0998a619 100644
--- a/homeassistant/components/knx/storage/entity_store_schema.py
+++ b/homeassistant/components/knx/storage/entity_store_schema.py
@@ -408,19 +408,21 @@ LIGHT_KNX_SCHEMA = AllSerializeFirst(
             probatio.Optional(CONF_GA_COLOR_TEMP): GASelector(
                 write_required=True, dpt=ColorTempModes
             ),
-            probatio.Required(
-                CONF_COLOR_TEMP_MIN, default=2700
-            ): selector.NumberSelector(
-                selector.NumberSelectorConfig(
-                    min=1, max=10000, step=1, unit_of_measurement="K"
-                )
+            probatio.Required(CONF_COLOR_TEMP_MIN, default=2700): AllSerializeFirst(
+                selector.NumberSelector(
+                    selector.NumberSelectorConfig(
+                        min=1, max=10000, step=1, unit_of_measurement="K"
+                    )
+                ),
+                probatio.Coerce(int),
             ),
-            probatio.Required(
-                CONF_COLOR_TEMP_MAX, default=6000
-            ): selector.NumberSelector(
-                selector.NumberSelectorConfig(
-                    min=1, max=10000, step=1, unit_of_measurement="K"
-                )
+            probatio.Required(CONF_COLOR_TEMP_MAX, default=6000): AllSerializeFirst(
+                selector.NumberSelector(
+                    selector.NumberSelectorConfig(
+                        min=1, max=10000, step=1, unit_of_measurement="K"
+                    )
+                ),
+                probatio.Coerce(int),
             ),
             probatio.Optional(CONF_COLOR): GroupSelect(
                 GroupSelectOption(
diff --git a/homeassistant/components/knx/strings.json b/homeassistant/components/knx/strings.json
index faec2c8182b9..d930ab5c1dc1 100644
--- a/homeassistant/components/knx/strings.json
+++ b/homeassistant/components/knx/strings.json
@@ -1321,6 +1321,10 @@
       },
       "title": "KNX Data Secure telegrams can't be decrypted"
     },
+    "entity_validation_error": {
+      "description": "The stored configuration of the following KNX {platform} entities is invalid, so they were not set up:\n\n{entities}\n\nCorrect or delete them. Check the logs for details.",
+      "title": "Invalid KNX entity configuration"
+    },
     "telegram_storage_error": {
       "description": "The configured KNX telegram storage backend failed to initialize. As a result, KNX telegrams are currently not being stored. Check the logs for details on the error and ensure your database is accessible.",
       "title": "KNX telegram storage error"
diff --git a/homeassistant/components/knx/switch.py b/homeassistant/components/knx/switch.py
index 55d622b33dc7..200cc391d79a 100644
--- a/homeassistant/components/knx/switch.py
+++ b/homeassistant/components/knx/switch.py
@@ -65,7 +65,7 @@ async def async_setup_entry(
             KnxYamlSwitch(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.SWITCH):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.SWITCH):
         entities.extend(
             KnxUiSwitch(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/text.py b/homeassistant/components/knx/text.py
index af0a8d37a1df..f035740aa607 100644
--- a/homeassistant/components/knx/text.py
+++ b/homeassistant/components/knx/text.py
@@ -66,7 +66,7 @@ async def async_setup_entry(
             KnxYamlText(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.TEXT):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.TEXT):
         entities.extend(
             KnxUiText(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/time.py b/homeassistant/components/knx/time.py
index a3c4d6d63d63..19b962e4eb43 100644
--- a/homeassistant/components/knx/time.py
+++ b/homeassistant/components/knx/time.py
@@ -59,7 +59,7 @@ async def async_setup_entry(
             KnxYamlTime(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.TIME):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.TIME):
         entities.extend(
             KnxUiTime(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/homeassistant/components/knx/weather.py b/homeassistant/components/knx/weather.py
index 14b45d418375..03315f8efd7e 100644
--- a/homeassistant/components/knx/weather.py
+++ b/homeassistant/components/knx/weather.py
@@ -72,7 +72,7 @@ async def async_setup_entry(
             KnxYamlWeather(knx_module, entity_config)
             for entity_config in yaml_platform_config
         )
-    if ui_config := knx_module.config_store.data["entities"].get(Platform.WEATHER):
+    if ui_config := knx_module.config_store.get_entity_configs(Platform.WEATHER):
         entities.extend(
             KnxUiWeather(knx_module, unique_id, config)
             for unique_id, config in ui_config.items()
diff --git a/tests/components/knx/fixtures/config_store_date.json b/tests/components/knx/fixtures/config_store_date.json
index 48cbc29abde4..5d69052790cc 100644
--- a/tests/components/knx/fixtures/config_store_date.json
+++ b/tests/components/knx/fixtures/config_store_date.json
@@ -34,7 +34,7 @@
               "passive": []
             },
             "respond_to_read": false,
-            "sync_state": false
+            "sync_state": true
           }
         }
       }
diff --git a/tests/components/knx/fixtures/config_store_datetime.json b/tests/components/knx/fixtures/config_store_datetime.json
index c5dbd5fc88f9..c6ff74c20208 100644
--- a/tests/components/knx/fixtures/config_store_datetime.json
+++ b/tests/components/knx/fixtures/config_store_datetime.json
@@ -34,7 +34,7 @@
               "passive": []
             },
             "respond_to_read": false,
-            "sync_state": false
+            "sync_state": true
           }
         }
       }
diff --git a/tests/components/knx/fixtures/config_store_invalid.json b/tests/components/knx/fixtures/config_store_invalid.json
new file mode 100644
index 000000000000..70322ec49a58
--- /dev/null
+++ b/tests/components/knx/fixtures/config_store_invalid.json
@@ -0,0 +1,64 @@
+{
+  "version": 2,
+  "minor_version": 4,
+  "key": "knx/config_store.json",
+  "data": {
+    "entities": {
+      "switch": {
+        "knx_es_01JWDFHP1ZG6NT62BX6ENR3MG7": {
+          "entity": {
+            "name": "valid",
+            "device_info": null,
+            "entity_category": "config"
+          },
+          "knx": {
+            "ga_switch": {
+              "write": "1/1/45",
+              "state": "1/0/45",
+              "passive": []
+            },
+            "invert": false,
+            "sync_state": true,
+            "respond_to_read": false
+          }
+        },
+        "knx_es_01JWDFKBG3PYPPRQDJZ3N3PMCB": {
+          "entity": {
+            "name": "invalid group address",
+            "device_info": null,
+            "entity_category": null
+          },
+          "knx": {
+            "ga_switch": {
+              "write": "not a group address",
+              "state": null,
+              "passive": []
+            },
+            "invert": false,
+            "sync_state": true,
+            "respond_to_read": false
+          }
+        }
+      },
+      "light": {
+        "knx_es_01J85ZKTFHSZNG4X9DYBE592TF": {
+          "entity": {
+            "name": "missing defaults",
+            "device_info": null,
+            "entity_category": null
+          },
+          "knx": {
+            "ga_switch": {
+              "write": "1/1/21",
+              "state": "1/0/21",
+              "passive": []
+            },
+            "sync_state": true
+          }
+        }
+      }
+    },
+    "expose": {},
+    "time_server": {}
+  }
+}
diff --git a/tests/components/knx/fixtures/config_store_time.json b/tests/components/knx/fixtures/config_store_time.json
index ad0d6de2ed52..fa6c2bb8a88b 100644
--- a/tests/components/knx/fixtures/config_store_time.json
+++ b/tests/components/knx/fixtures/config_store_time.json
@@ -34,7 +34,7 @@
               "passive": []
             },
             "respond_to_read": false,
-            "sync_state": false
+            "sync_state": true
           }
         }
       }
diff --git a/tests/components/knx/test_config_store.py b/tests/components/knx/test_config_store.py
index 7edf7cc2f6ea..04f7618c8e3c 100644
--- a/tests/components/knx/test_config_store.py
+++ b/tests/components/knx/test_config_store.py
@@ -4,12 +4,17 @@ from typing import Any
 
 import pytest
 
+from homeassistant.components.knx.const import (
+    DOMAIN,
+    KNX_MODULE_KEY,
+    REPAIR_ISSUE_ENTITY_VALIDATION_ERROR,
+)
 from homeassistant.components.knx.storage.config_store import (
     STORAGE_KEY as KNX_CONFIG_STORAGE_KEY,
 )
-from homeassistant.const import Platform
+from homeassistant.const import EntityCategory, Platform
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers import entity_registry as er
+from homeassistant.helpers import entity_registry as er, issue_registry as ir
 
 from . import KnxEntityGenerator
 from .conftest import KNXTestKit
@@ -605,6 +610,86 @@ async def test_delete_expose_error(
     )
 
 
+##################
+# STORE VALIDATION
+##################
+
+VALID_SWITCH_UID = "knx_es_01JWDFHP1ZG6NT62BX6ENR3MG7"
+INVALID_SWITCH_UID = "knx_es_01JWDFKBG3PYPPRQDJZ3N3PMCB"
+LIGHT_UID = "knx_es_01J85ZKTFHSZNG4X9DYBE592TF"
+
+
+async def test_load_skips_invalid_entity_config(
+    hass: HomeAssistant,
+    knx: KNXTestKit,
+    entity_registry: er.EntityRegistry,
+    issue_registry: ir.IssueRegistry,
+) -> None:
+    """Test an invalid stored config is skipped without failing its platform."""
+    await knx.setup_integration(
+        config_store_fixture="config_store_invalid.json", state_updater=False
+    )
+    assert entity_registry.async_get_entity_id(
+        Platform.SWITCH, DOMAIN, VALID_SWITCH_UID
+    )
+    assert (
+        entity_registry.async_get_entity_id(Platform.SWITCH, DOMAIN, INVALID_SWITCH_UID)
+        is None
+    )
+
+    issue = issue_registry.async_get_issue(
+        DOMAIN, f"{REPAIR_ISSUE_ENTITY_VALIDATION_ERROR}_{Platform.SWITCH}"
+    )
+    assert issue is not None
+    assert issue.severity is ir.IssueSeverity.ERROR
+    assert issue.translation_placeholders == {
+        "platform": Platform.SWITCH,
+        "entities": f"- {INVALID_SWITCH_UID}",
+    }
+
+
+async def test_load_applies_schema_defaults_and_coercion(
+    hass: HomeAssistant,
+    knx: KNXTestKit,
+    entity_registry: er.EntityRegistry,
+) -> None:
+    """Test stored configs are normalized on load.
+
+    The light in the fixture predates `color_temp_min` / `color_temp_max`, which
+    `KnxUiLight.__init__` reads by direct key access, and the switch stores
+    `entity_category` as a plain string.
+    """
+    await knx.setup_integration(
+        config_store_fixture="config_store_invalid.json", state_updater=False
+    )
+    assert hass.states.get("light.missing_defaults") is not None
+    config_store = hass.data[KNX_MODULE_KEY].config_store
+    light_config = config_store.get_entity_configs(Platform.LIGHT)[LIGHT_UID][DOMAIN]
+    assert light_config["color_temp_min"] == 2700
+    assert light_config["color_temp_max"] == 6000
+
+    switch_id = entity_registry.async_get_entity_id(
+        Platform.SWITCH, DOMAIN, VALID_SWITCH_UID
+    )
+    assert entity_registry.async_get(switch_id).entity_category is EntityCategory.CONFIG
+
+
+async def test_load_valid_store_creates_no_issue(
+    hass: HomeAssistant,
+    knx: KNXTestKit,
+    issue_registry: ir.IssueRegistry,
+) -> None:
+    """Test a valid store doesn't raise a repair issue."""
+    await knx.setup_integration(
+        config_store_fixture="config_store_light_switch.json", state_updater=False
+    )
+    assert not [
+        issue
+        for issue in issue_registry.issues.values()
+        if issue.issue_id.startswith(REPAIR_ISSUE_ENTITY_VALIDATION_ERROR)
+    ]
+
+
 ###########
 # MIGRATION
 ###########
diff --git a/tests/components/knx/test_number.py b/tests/components/knx/test_number.py
index 1bdea26fabf0..eb631b8b1ec5 100644
--- a/tests/components/knx/test_number.py
+++ b/tests/components/knx/test_number.py
@@ -281,7 +281,7 @@ async def test_number_ui_load(knx: KNXTestKit) -> None:
     )
     knx.assert_state(
         "number.test_options",
-        "3000",
+        "3000.0",  # `min`, `max` and `step` are floats after validation
         unit_of_measurement="kW",
         device_class="power",
         min=3000,