diff --git a/homeassistant/components/isy994/switch.py b/homeassistant/components/isy994/switch.py
index c5fba9cb54b..f6cb68b8a0f 100644
--- a/homeassistant/components/isy994/switch.py
+++ b/homeassistant/components/isy994/switch.py
@@ -84,12 +84,12 @@ class ISYSwitchEntity(ISYNodeEntity, SwitchEntity):
     async def async_turn_off(self, **kwargs: Any) -> None:
         """Send the turn off command to the ISY switch."""
         if not await self._node.turn_off():
-            HomeAssistantError(f"Unable to turn off switch {self._node.address}")
+            raise HomeAssistantError(f"Unable to turn off switch {self._node.address}")
 
     async def async_turn_on(self, **kwargs: Any) -> None:
         """Send the turn on command to the ISY switch."""
         if not await self._node.turn_on():
-            HomeAssistantError(f"Unable to turn on switch {self._node.address}")
+            raise HomeAssistantError(f"Unable to turn on switch {self._node.address}")
 
     @property
     def icon(self) -> str | None:
@@ -110,14 +110,14 @@ class ISYSwitchProgramEntity(ISYProgramEntity, SwitchEntity):
     async def async_turn_on(self, **kwargs: Any) -> None:
         """Send the turn on command to the ISY switch program."""
         if not await self._actions.run_then():
-            HomeAssistantError(
+            raise HomeAssistantError(
                 f"Unable to run 'then' clause on program switch {self._actions.address}"
             )
 
     async def async_turn_off(self, **kwargs: Any) -> None:
         """Send the turn off command to the ISY switch program."""
         if not await self._actions.run_else():
-            HomeAssistantError(
+            raise HomeAssistantError(
                 f"Unable to run 'else' clause on program switch {self._actions.address}"
             )
 
diff --git a/homeassistant/components/moehlenhoff_alpha2/__init__.py b/homeassistant/components/moehlenhoff_alpha2/__init__.py
index 2a254ee0ef4..4992ecf34a7 100644
--- a/homeassistant/components/moehlenhoff_alpha2/__init__.py
+++ b/homeassistant/components/moehlenhoff_alpha2/__init__.py
@@ -124,7 +124,7 @@ class Alpha2BaseCoordinator(DataUpdateCoordinator[dict[str, dict]]):
         """Set the mode of the given heat area."""
         # HEATAREA_MODE: 0=Auto, 1=Tag, 2=Nacht
         if heat_area_mode not in (0, 1, 2):
-            ValueError(f"Invalid heat area mode: {heat_area_mode}")
+            raise ValueError(f"Invalid heat area mode: {heat_area_mode}")
         _LOGGER.debug(
             "Setting mode of heat area %s to %d",
             heat_area_id,