diff --git a/homeassistant/backports/enum.py b/homeassistant/backports/enum.py
index 35562877bab..178859ecbe7 100644
--- a/homeassistant/backports/enum.py
+++ b/homeassistant/backports/enum.py
@@ -10,6 +10,8 @@ from typing_extensions import Self
 class StrEnum(str, Enum):
     """Partial backport of Python 3.11's StrEnum for our basic use cases."""
 
+    value: str
+
     def __new__(cls, value: str, *args: Any, **kwargs: Any) -> Self:
         """Create a new StrEnum instance."""
         if not isinstance(value, str):
@@ -18,7 +20,7 @@ class StrEnum(str, Enum):
 
     def __str__(self) -> str:
         """Return self.value."""
-        return str(self.value)
+        return self.value
 
     @staticmethod
     def _generate_next_value_(
diff --git a/homeassistant/components/demo/climate.py b/homeassistant/components/demo/climate.py
index 407860526ae..bfc2cd1a2e7 100644
--- a/homeassistant/components/demo/climate.py
+++ b/homeassistant/components/demo/climate.py
@@ -64,7 +64,7 @@ async def async_setup_entry(
                 aux=False,
                 target_temp_high=None,
                 target_temp_low=None,
-                hvac_modes=[cls.value for cls in HVACMode if cls != HVACMode.HEAT_COOL],
+                hvac_modes=[cls for cls in HVACMode if cls != HVACMode.HEAT_COOL],
             ),
             DemoClimate(
                 unique_id="climate_3",
@@ -83,7 +83,7 @@ async def async_setup_entry(
                 aux=None,
                 target_temp_high=24,
                 target_temp_low=21,
-                hvac_modes=[cls.value for cls in HVACMode if cls != HVACMode.HEAT],
+                hvac_modes=[cls for cls in HVACMode if cls != HVACMode.HEAT],
             ),
         ]
     )
diff --git a/homeassistant/components/isy994/climate.py b/homeassistant/components/isy994/climate.py
index 83fea57a9fa..8fc90efaabc 100644
--- a/homeassistant/components/isy994/climate.py
+++ b/homeassistant/components/isy994/climate.py
@@ -37,6 +37,7 @@ from homeassistant.const import (
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.util.enum import try_parse_enum
 
 from .const import (
     _LOGGER,
@@ -131,7 +132,10 @@ class ISYThermostatEntity(ISYNodeEntity, ClimateEntity):
                 if self._node.protocol == PROTO_INSTEON
                 else UOM_HVAC_MODE_GENERIC
             )
-        return UOM_TO_STATES[uom].get(hvac_mode.value, HVACMode.OFF)
+        return (
+            try_parse_enum(HVACMode, UOM_TO_STATES[uom].get(hvac_mode.value))
+            or HVACMode.OFF
+        )
 
     @property
     def hvac_action(self) -> HVACAction | None:
@@ -139,7 +143,9 @@ class ISYThermostatEntity(ISYNodeEntity, ClimateEntity):
         hvac_action = self._node.aux_properties.get(PROP_HEAT_COOL_STATE)
         if not hvac_action:
             return None
-        return UOM_TO_STATES[UOM_HVAC_ACTIONS].get(hvac_action.value)
+        return try_parse_enum(
+            HVACAction, UOM_TO_STATES[UOM_HVAC_ACTIONS].get(hvac_action.value)
+        )
 
     @property
     def current_temperature(self) -> float | None: