diff --git a/homeassistant/components/gree/climate.py b/homeassistant/components/gree/climate.py
index 976cc31761d..6afbca7789b 100644
--- a/homeassistant/components/gree/climate.py
+++ b/homeassistant/components/gree/climate.py
@@ -35,12 +35,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import (
-    ATTR_TEMPERATURE,
-    PRECISION_WHOLE,
-    TEMP_CELSIUS,
-    TEMP_FAHRENHEIT,
-)
+from homeassistant.const import ATTR_TEMPERATURE, PRECISION_WHOLE, UnitOfTemperature
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.device_registry import CONNECTION_NETWORK_MAC
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
@@ -151,7 +146,9 @@ class GreeClimateEntity(CoordinatorEntity, ClimateEntity):
     def temperature_unit(self) -> str:
         """Return the temperature units for the device."""
         units = self.coordinator.device.temperature_units
-        return TEMP_CELSIUS if units == TemperatureUnits.C else TEMP_FAHRENHEIT
+        if units == TemperatureUnits.C:
+            return UnitOfTemperature.CELSIUS
+        return UnitOfTemperature.FAHRENHEIT
 
     @property
     def current_temperature(self) -> float:
@@ -182,12 +179,16 @@ class GreeClimateEntity(CoordinatorEntity, ClimateEntity):
     @property
     def min_temp(self) -> float:
         """Return the minimum temperature supported by the device."""
-        return TEMP_MIN if self.temperature_unit == TEMP_CELSIUS else TEMP_MIN_F
+        if self.temperature_unit == UnitOfTemperature.CELSIUS:
+            return TEMP_MIN
+        return TEMP_MIN_F
 
     @property
     def max_temp(self) -> float:
         """Return the maximum temperature supported by the device."""
-        return TEMP_MAX if self.temperature_unit == TEMP_CELSIUS else TEMP_MAX_F
+        if self.temperature_unit == UnitOfTemperature.CELSIUS:
+            return TEMP_MAX
+        return TEMP_MAX_F
 
     @property
     def target_temperature_step(self) -> float:
diff --git a/homeassistant/components/heatmiser/climate.py b/homeassistant/components/heatmiser/climate.py
index 7f6bd0ccf9c..24a0c88b45a 100644
--- a/homeassistant/components/heatmiser/climate.py
+++ b/homeassistant/components/heatmiser/climate.py
@@ -19,8 +19,7 @@ from homeassistant.const import (
     CONF_ID,
     CONF_NAME,
     CONF_PORT,
-    TEMP_CELSIUS,
-    TEMP_FAHRENHEIT,
+    UnitOfTemperature,
 )
 from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
@@ -120,9 +119,9 @@ class HeatmiserV3Thermostat(ClimateEntity):
             return
         self.dcb = self.therm.read_dcb()
         self._attr_temperature_unit = (
-            TEMP_CELSIUS
+            UnitOfTemperature.CELSIUS
             if (self.therm.get_temperature_format() == "C")
-            else TEMP_FAHRENHEIT
+            else UnitOfTemperature.FAHRENHEIT
         )
         self._current_temperature = int(self.therm.get_floor_temp())
         self._target_temperature = int(self.therm.get_target_temp())
diff --git a/homeassistant/components/hisense_aehw4a1/climate.py b/homeassistant/components/hisense_aehw4a1/climate.py
index fc956ec8760..113a0c622b9 100644
--- a/homeassistant/components/hisense_aehw4a1/climate.py
+++ b/homeassistant/components/hisense_aehw4a1/climate.py
@@ -25,12 +25,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import (
-    ATTR_TEMPERATURE,
-    PRECISION_WHOLE,
-    TEMP_CELSIUS,
-    TEMP_FAHRENHEIT,
-)
+from homeassistant.const import ATTR_TEMPERATURE, PRECISION_WHOLE, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -184,9 +179,9 @@ class ClimateAehW4a1(ClimateEntity):
         self._on = status["run_status"]
 
         if status["temperature_Fahrenheit"] == "0":
-            self._attr_temperature_unit = TEMP_CELSIUS
+            self._attr_temperature_unit = UnitOfTemperature.CELSIUS
         else:
-            self._attr_temperature_unit = TEMP_FAHRENHEIT
+            self._attr_temperature_unit = UnitOfTemperature.FAHRENHEIT
 
         self._current_temperature = int(status["indoor_temperature_status"], 2)
 
@@ -274,14 +269,14 @@ class ClimateAehW4a1(ClimateEntity):
     @property
     def min_temp(self):
         """Return the minimum temperature."""
-        if self.temperature_unit == TEMP_CELSIUS:
+        if self.temperature_unit == UnitOfTemperature.CELSIUS:
             return MIN_TEMP_C
         return MIN_TEMP_F
 
     @property
     def max_temp(self):
         """Return the maximum temperature."""
-        if self.temperature_unit == TEMP_CELSIUS:
+        if self.temperature_unit == UnitOfTemperature.CELSIUS:
             return MAX_TEMP_C
         return MAX_TEMP_F
 
@@ -301,7 +296,7 @@ class ClimateAehW4a1(ClimateEntity):
             _LOGGER.debug("Setting temp of %s to %s", self._unique_id, temp)
             if self._preset_mode != PRESET_NONE:
                 await self.async_set_preset_mode(PRESET_NONE)
-            if self.temperature_unit == TEMP_CELSIUS:
+            if self.temperature_unit == UnitOfTemperature.CELSIUS:
                 await self._device.command(f"temp_{int(temp)}_C")
             else:
                 await self._device.command(f"temp_{int(temp)}_F")
diff --git a/homeassistant/components/hive/climate.py b/homeassistant/components/hive/climate.py
index 620d679fe1c..4dc8d921cd3 100644
--- a/homeassistant/components/hive/climate.py
+++ b/homeassistant/components/hive/climate.py
@@ -14,7 +14,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS, TEMP_FAHRENHEIT
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import config_validation as cv, entity_platform
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -45,7 +45,7 @@ HIVE_TO_HASS_HVAC_ACTION = {
     True: HVACAction.HEATING,
 }
 
-TEMP_UNIT = {"C": TEMP_CELSIUS, "F": TEMP_FAHRENHEIT}
+TEMP_UNIT = {"C": UnitOfTemperature.CELSIUS, "F": UnitOfTemperature.FAHRENHEIT}
 PARALLEL_UPDATES = 0
 SCAN_INTERVAL = timedelta(seconds=15)
 _LOGGER = logging.getLogger()
diff --git a/homeassistant/components/homekit_controller/climate.py b/homeassistant/components/homekit_controller/climate.py
index 2dc998200a4..524847d46fe 100644
--- a/homeassistant/components/homekit_controller/climate.py
+++ b/homeassistant/components/homekit_controller/climate.py
@@ -32,7 +32,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS, Platform
+from homeassistant.const import ATTR_TEMPERATURE, Platform, UnitOfTemperature
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -114,7 +114,7 @@ async def async_setup_entry(
 class HomeKitBaseClimateEntity(HomeKitEntity, ClimateEntity):
     """The base HomeKit Controller climate entity."""
 
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     def get_characteristic_types(self) -> list[str]:
         """Define the homekit characteristics the entity cares about."""
diff --git a/homeassistant/components/homematic/climate.py b/homeassistant/components/homematic/climate.py
index d597eca30cd..998113f1bcf 100644
--- a/homeassistant/components/homematic/climate.py
+++ b/homeassistant/components/homematic/climate.py
@@ -12,7 +12,7 @@ from homeassistant.components.climate import (
     ClimateEntityFeature,
     HVACMode,
 )
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
@@ -58,7 +58,7 @@ class HMThermostat(HMDevice, ClimateEntity):
     _attr_supported_features = (
         ClimateEntityFeature.TARGET_TEMPERATURE | ClimateEntityFeature.PRESET_MODE
     )
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     @property
     def hvac_mode(self) -> HVACMode:
diff --git a/homeassistant/components/homematicip_cloud/climate.py b/homeassistant/components/homematicip_cloud/climate.py
index b6ac23b5c71..737ffaf8c19 100644
--- a/homeassistant/components/homematicip_cloud/climate.py
+++ b/homeassistant/components/homematicip_cloud/climate.py
@@ -24,7 +24,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -69,7 +69,7 @@ class HomematicipHeatingGroup(HomematicipGenericEntity, ClimateEntity):
     _attr_supported_features = (
         ClimateEntityFeature.PRESET_MODE | ClimateEntityFeature.TARGET_TEMPERATURE
     )
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     def __init__(self, hap: HomematicipHAP, device: AsyncHeatingGroup) -> None:
         """Initialize heating group."""
diff --git a/homeassistant/components/honeywell/climate.py b/homeassistant/components/honeywell/climate.py
index 64f87fd19ae..3bc5e0e7ef8 100644
--- a/homeassistant/components/honeywell/climate.py
+++ b/homeassistant/components/honeywell/climate.py
@@ -22,7 +22,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS, TEMP_FAHRENHEIT
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -103,9 +103,9 @@ class HoneywellUSThermostat(ClimateEntity):
 
         self._attr_unique_id = device.deviceid
         self._attr_name = device.name
-        self._attr_temperature_unit = (
-            TEMP_CELSIUS if device.temperature_unit == "C" else TEMP_FAHRENHEIT
-        )
+        self._attr_temperature_unit = UnitOfTemperature.FAHRENHEIT
+        if device.temperature_unit == "C":
+            self._attr_temperature_unit = UnitOfTemperature.CELSIUS
         self._attr_preset_modes = [PRESET_NONE, PRESET_AWAY, PRESET_HOLD]
         self._attr_is_aux_heat = device.system_mode == "emheat"
 
diff --git a/homeassistant/components/iaqualink/climate.py b/homeassistant/components/iaqualink/climate.py
index 408bd56778e..7c67dbdea4b 100644
--- a/homeassistant/components/iaqualink/climate.py
+++ b/homeassistant/components/iaqualink/climate.py
@@ -11,7 +11,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS, TEMP_FAHRENHEIT
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -68,8 +68,8 @@ class HassAqualinkThermostat(AqualinkEntity, ClimateEntity):
     def temperature_unit(self) -> str:
         """Return the unit of measurement."""
         if self.dev.unit == "F":
-            return TEMP_FAHRENHEIT
-        return TEMP_CELSIUS
+            return UnitOfTemperature.FAHRENHEIT
+        return UnitOfTemperature.CELSIUS
 
     @property
     def min_temp(self) -> int:
diff --git a/homeassistant/components/incomfort/climate.py b/homeassistant/components/incomfort/climate.py
index 1d3c18fa608..cae73495438 100644
--- a/homeassistant/components/incomfort/climate.py
+++ b/homeassistant/components/incomfort/climate.py
@@ -9,7 +9,7 @@ from homeassistant.components.climate import (
     ClimateEntityFeature,
     HVACMode,
 )
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
@@ -41,7 +41,7 @@ class InComfortClimate(IncomfortChild, ClimateEntity):
     _attr_hvac_mode = HVACMode.HEAT
     _attr_hvac_modes = [HVACMode.HEAT]
     _attr_supported_features = ClimateEntityFeature.TARGET_TEMPERATURE
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     def __init__(self, client, heater, room) -> None:
         """Initialize the climate device."""
diff --git a/homeassistant/components/insteon/climate.py b/homeassistant/components/insteon/climate.py
index 0211b316b96..f88dadf1223 100644
--- a/homeassistant/components/insteon/climate.py
+++ b/homeassistant/components/insteon/climate.py
@@ -17,7 +17,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS, TEMP_FAHRENHEIT
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -89,8 +89,8 @@ class InsteonClimateEntity(InsteonEntity, ClimateEntity):
     def temperature_unit(self) -> str:
         """Return the unit of measurement."""
         if self._insteon_device.configuration[CELSIUS].value:
-            return TEMP_CELSIUS
-        return TEMP_FAHRENHEIT
+            return UnitOfTemperature.CELSIUS
+        return UnitOfTemperature.FAHRENHEIT
 
     @property
     def current_humidity(self) -> int | None:
diff --git a/homeassistant/components/intellifire/climate.py b/homeassistant/components/intellifire/climate.py
index cf36e6b48a0..649234d7568 100644
--- a/homeassistant/components/intellifire/climate.py
+++ b/homeassistant/components/intellifire/climate.py
@@ -10,7 +10,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -51,7 +51,7 @@ class IntellifireClimate(IntellifireEntity, ClimateEntity):
     _attr_max_temp = 37
     _attr_supported_features = ClimateEntityFeature.TARGET_TEMPERATURE
     _attr_target_temperature_step = 1.0
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
     last_temp = DEFAULT_THERMOSTAT_TEMP
 
     def __init__(
diff --git a/homeassistant/components/intesishome/climate.py b/homeassistant/components/intesishome/climate.py
index bfdf406ee1a..16cf62627f1 100644
--- a/homeassistant/components/intesishome/climate.py
+++ b/homeassistant/components/intesishome/climate.py
@@ -27,7 +27,7 @@ from homeassistant.const import (
     CONF_DEVICE,
     CONF_PASSWORD,
     CONF_USERNAME,
-    TEMP_CELSIUS,
+    UnitOfTemperature,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import PlatformNotReady
@@ -145,7 +145,7 @@ class IntesisAC(ClimateEntity):
     """Represents an Intesishome air conditioning device."""
 
     _attr_should_poll = False
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     def __init__(self, ih_device_id, ih_device, controller):
         """Initialize the thermostat."""
diff --git a/homeassistant/components/isy994/climate.py b/homeassistant/components/isy994/climate.py
index c141f856408..5267dbff48d 100644
--- a/homeassistant/components/isy994/climate.py
+++ b/homeassistant/components/isy994/climate.py
@@ -29,12 +29,7 @@ from homeassistant.components.climate import (
     HVACMode,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import (
-    ATTR_TEMPERATURE,
-    PRECISION_TENTHS,
-    TEMP_CELSIUS,
-    TEMP_FAHRENHEIT,
-)
+from homeassistant.const import ATTR_TEMPERATURE, PRECISION_TENTHS, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -103,10 +98,10 @@ class ISYThermostatEntity(ISYNodeEntity, ClimateEntity):
         if not (uom := self._node.aux_properties.get(PROP_UOM)):
             return self.hass.config.units.temperature_unit
         if uom.value == UOM_ISY_CELSIUS:
-            return TEMP_CELSIUS
+            return UnitOfTemperature.CELSIUS
         if uom.value == UOM_ISY_FAHRENHEIT:
-            return TEMP_FAHRENHEIT
-        return TEMP_FAHRENHEIT
+            return UnitOfTemperature.FAHRENHEIT
+        return UnitOfTemperature.FAHRENHEIT
 
     @property
     def current_humidity(self) -> int | None:
diff --git a/homeassistant/components/izone/climate.py b/homeassistant/components/izone/climate.py
index c94ccada5b3..59b57f888a7 100644
--- a/homeassistant/components/izone/climate.py
+++ b/homeassistant/components/izone/climate.py
@@ -25,7 +25,7 @@ from homeassistant.const import (
     CONF_EXCLUDE,
     PRECISION_HALVES,
     PRECISION_TENTHS,
-    TEMP_CELSIUS,
+    UnitOfTemperature,
 )
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import entity_platform
@@ -129,7 +129,7 @@ class ControllerDevice(ClimateEntity):
 
     _attr_precision = PRECISION_TENTHS
     _attr_should_poll = False
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     def __init__(self, controller: Controller) -> None:
         """Initialise ControllerDevice."""
@@ -437,7 +437,7 @@ class ZoneDevice(ClimateEntity):
 
     _attr_precision = PRECISION_TENTHS
     _attr_should_poll = False
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     def __init__(self, controller: ControllerDevice, zone: Zone) -> None:
         """Initialise ZoneDevice."""
diff --git a/homeassistant/components/knx/climate.py b/homeassistant/components/knx/climate.py
index bb2fe7dfbcc..72039e1300f 100644
--- a/homeassistant/components/knx/climate.py
+++ b/homeassistant/components/knx/climate.py
@@ -19,8 +19,8 @@ from homeassistant.const import (
     ATTR_TEMPERATURE,
     CONF_ENTITY_CATEGORY,
     CONF_NAME,
-    TEMP_CELSIUS,
     Platform,
+    UnitOfTemperature,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -133,7 +133,7 @@ class KNXClimate(KnxEntity, ClimateEntity):
     """Representation of a KNX climate device."""
 
     _device: XknxClimate
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     def __init__(self, xknx: XKNX, config: ConfigType) -> None:
         """Initialize of a KNX climate device."""
diff --git a/homeassistant/components/lcn/climate.py b/homeassistant/components/lcn/climate.py
index 8d701fbfa2f..4f40bcd25cd 100644
--- a/homeassistant/components/lcn/climate.py
+++ b/homeassistant/components/lcn/climate.py
@@ -19,8 +19,7 @@ from homeassistant.const import (
     CONF_ENTITIES,
     CONF_SOURCE,
     CONF_UNIT_OF_MEASUREMENT,
-    TEMP_CELSIUS,
-    TEMP_FAHRENHEIT,
+    UnitOfTemperature,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -114,10 +113,10 @@ class LcnClimate(LcnEntity, ClimateEntity):
     @property
     def temperature_unit(self) -> str:
         """Return the unit of measurement."""
-        # Config schema only allows for: TEMP_CELSIUS and TEMP_FAHRENHEIT
+        # Config schema only allows for: UnitOfTemperature.CELSIUS and UnitOfTemperature.FAHRENHEIT
         if self.unit == pypck.lcn_defs.VarUnit.FAHRENHEIT:
-            return TEMP_FAHRENHEIT
-        return TEMP_CELSIUS
+            return UnitOfTemperature.FAHRENHEIT
+        return UnitOfTemperature.CELSIUS
 
     @property
     def current_temperature(self) -> float | None:
diff --git a/homeassistant/components/lightwave/climate.py b/homeassistant/components/lightwave/climate.py
index 834fc7eaeca..60108aba024 100644
--- a/homeassistant/components/lightwave/climate.py
+++ b/homeassistant/components/lightwave/climate.py
@@ -11,7 +11,7 @@ from homeassistant.components.climate import (
     HVACAction,
     HVACMode,
 )
-from homeassistant.const import ATTR_TEMPERATURE, CONF_NAME, TEMP_CELSIUS
+from homeassistant.const import ATTR_TEMPERATURE, CONF_NAME, UnitOfTemperature
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
@@ -49,7 +49,7 @@ class LightwaveTrv(ClimateEntity):
     _attr_max_temp = DEFAULT_MAX_TEMP
     _attr_supported_features = ClimateEntityFeature.TARGET_TEMPERATURE
     _attr_target_temperature_step = 0.5
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
 
     def __init__(self, name, device_id, lwlink, serial):
         """Initialize LightwaveTrv entity."""
diff --git a/homeassistant/components/lookin/climate.py b/homeassistant/components/lookin/climate.py
index 46c6623e5b7..349f03de4c3 100644
--- a/homeassistant/components/lookin/climate.py
+++ b/homeassistant/components/lookin/climate.py
@@ -23,8 +23,8 @@ from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     ATTR_TEMPERATURE,
     PRECISION_WHOLE,
-    TEMP_CELSIUS,
     Platform,
+    UnitOfTemperature,
 )
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -92,7 +92,7 @@ class ConditionerEntity(LookinCoordinatorEntity, ClimateEntity):
     """An aircon or heat pump."""
 
     _attr_current_humidity: float | None = None  # type: ignore[assignment]
-    _attr_temperature_unit = TEMP_CELSIUS
+    _attr_temperature_unit = UnitOfTemperature.CELSIUS
     _attr_supported_features = (
         ClimateEntityFeature.TARGET_TEMPERATURE
         | ClimateEntityFeature.FAN_MODE