diff --git a/changelog.txt b/changelog.txt
index 17c25343..a7884223 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,5 +1,6 @@
 Version 0.32.3 (2022-02-12)
 - Add state to HmIP-MOD-HO
+- Use enum value for actions
 
 Version 0.32.2 (2022-02-11)
 - Fix HmIP-MOD-HO
diff --git a/hahomematic/devices/cover.py b/hahomematic/devices/cover.py
index 99dd870e..3b91e9da 100644
--- a/hahomematic/devices/cover.py
+++ b/hahomematic/devices/cover.py
@@ -35,11 +35,11 @@
 HM_OPENING = "UP"
 HM_CLOSING = "DOWN"
 
-GARAGE_DOOR_COMMAND_NOP = 0
-GARAGE_DOOR_COMMAND_OPEN = 1
-GARAGE_DOOR_COMMAND_STOP = 2
-GARAGE_DOOR_COMMAND_CLOSE = 3
-GARAGE_DOOR_COMMAND_PARTIAL_OPEN = 4
+GARAGE_DOOR_COMMAND_NOP = "NOP"
+GARAGE_DOOR_COMMAND_OPEN = "OPEN"
+GARAGE_DOOR_COMMAND_STOP = "STOP"
+GARAGE_DOOR_COMMAND_CLOSE = "CLOSE"
+GARAGE_DOOR_COMMAND_PARTIAL_OPEN = "PARTIAL_OPEN"
 
 GARAGE_DOOR_STATE_CLOSED = "CLOSED"
 GARAGE_DOOR_STATE_OPEN = "OPEN"
diff --git a/hahomematic/devices/lock.py b/hahomematic/devices/lock.py
index 30e3c119..a7b4390e 100644
--- a/hahomematic/devices/lock.py
+++ b/hahomematic/devices/lock.py
@@ -24,10 +24,13 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-HM_LOCKED_TEXT = "LOCKED"
-HM_LOCKED = 0
-HM_UNLOCKED = 1
-HM_OPEN = 2
+LOCK_STATE_UNKNOWN = "UNKNOWN"
+LOCK_STATE_LOCKED = "LOCKED"
+LOCK_STATE_UNLOCKED = "UNLOCKED"
+
+LOCK_TARGET_LEVEL_LOCKED = "LOCKED"
+LOCK_TARGET_LEVEL_UNLOCKED = "UNLOCKED"
+LOCK_TARGET_LEVEL_OPEN = "OPEN"
 
 
 class BaseLock(CustomEntity):
@@ -109,7 +112,7 @@ def _error(self) -> bool | None:
     @property
     def is_locked(self) -> bool:
         """Return true if lock is on."""
-        return self._lock_state == HM_LOCKED_TEXT
+        return self._lock_state == LOCK_STATE_LOCKED
 
     @property
     def is_jammed(self) -> bool:
@@ -118,15 +121,15 @@ def is_jammed(self) -> bool:
 
     async def lock(self) -> None:
         """Lock the lock."""
-        await self._e_lock_target_level.send_value(HM_LOCKED)
+        await self._e_lock_target_level.send_value(LOCK_TARGET_LEVEL_LOCKED)
 
     async def unlock(self) -> None:
         """Unlock the lock."""
-        await self._e_lock_target_level.send_value(HM_UNLOCKED)
+        await self._e_lock_target_level.send_value(LOCK_TARGET_LEVEL_UNLOCKED)
 
     async def open(self) -> None:
         """Open the lock."""
-        await self._e_lock_target_level.send_value(HM_OPEN)
+        await self._e_lock_target_level.send_value(LOCK_TARGET_LEVEL_OPEN)
 
 
 class CeRfLock(BaseLock):
diff --git a/hahomematic/internal/action.py b/hahomematic/internal/action.py
index 25d4611c..c842446e 100644
--- a/hahomematic/internal/action.py
+++ b/hahomematic/internal/action.py
@@ -35,3 +35,15 @@ def __init__(
             parameter_data=parameter_data,
             platform=HmPlatform.ACTION,
         )
+
+    async def send_value(self, value: Any) -> None:
+        """Set the value of the entity."""
+        # We allow setting the value via index as well, just in case.
+        if (
+            value is not None
+            and self._value_list
+            and isinstance(value, str)
+        ):
+            await super().send_value(self._value_list.index(value))
+        else:
+            await super().send_value(value)
diff --git a/tests/conftest.py b/tests/conftest.py
index 4ad82710..eeb5d2e9 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -133,7 +133,7 @@ async def get_hm_custom_entity(
     for custom_entity in hm_device.custom_entities.values():
         if custom_entity.channel_no == channel_no:
             if do_load:
-                await custom_entity.load_data()
+                await custom_entity.load_entity_value()
             return custom_entity
     return None
 
diff --git a/tests/test_central.py b/tests/test_central.py
index 67dbd13f..5e9949c8 100644
--- a/tests/test_central.py
+++ b/tests/test_central.py
@@ -10,6 +10,7 @@
 
 from hahomematic.const import HmEntityUsage
 from hahomematic.devices.climate import ATTR_TEMPERATURE, CeRfThermostat
+from hahomematic.devices.lock import LOCK_TARGET_LEVEL_OPEN
 
 
 @pytest.mark.asyncio
@@ -99,6 +100,18 @@ async def test_device_set_data(central, pydev_ccu, loop) -> None:
     assert new_value == 19.0
 
 
+@pytest.mark.asyncio
+async def test_action_on_lock(central, pydev_ccu, loop) -> None:
+    """Test callback."""
+    assert central
+    assert pydev_ccu
+    lock = await get_hm_custom_entity(central_unit=central, address="VCU9724704", channel_no=1, do_load=True)
+    assert lock
+    assert lock.is_locked is False
+    await lock.lock()
+    assert lock
+
+
 @pytest.mark.asyncio
 async def test_device_export(central, pydev_ccu, loop) -> None:
     """Test device export."""