diff --git a/homeassistant/components/baf/fan.py b/homeassistant/components/baf/fan.py
index d0ba668373a..8f7aab40b79 100644
--- a/homeassistant/components/baf/fan.py
+++ b/homeassistant/components/baf/fan.py
@@ -46,7 +46,7 @@ class BAFFan(BAFEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
+
     _attr_preset_modes = [PRESET_MODE_AUTO]
     _attr_speed_count = SPEED_COUNT
     _attr_name = None
diff --git a/homeassistant/components/balboa/fan.py b/homeassistant/components/balboa/fan.py
index 67c1d9a9a62..3ecfec53a1e 100644
--- a/homeassistant/components/balboa/fan.py
+++ b/homeassistant/components/balboa/fan.py
@@ -38,7 +38,7 @@ class BalboaPumpFanEntity(BalboaEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
+
     _attr_translation_key = "pump"
 
     def __init__(self, control: SpaControl) -> None:
diff --git a/homeassistant/components/comfoconnect/fan.py b/homeassistant/components/comfoconnect/fan.py
index 4e30b3ee3dc..2295fdb4e8e 100644
--- a/homeassistant/components/comfoconnect/fan.py
+++ b/homeassistant/components/comfoconnect/fan.py
@@ -68,7 +68,7 @@ class ComfoConnectFan(FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
+
     _attr_preset_modes = PRESET_MODES
     current_speed: float | None = None
 
diff --git a/homeassistant/components/deconz/fan.py b/homeassistant/components/deconz/fan.py
index 48f29cf9b72..26e4d3328b8 100644
--- a/homeassistant/components/deconz/fan.py
+++ b/homeassistant/components/deconz/fan.py
@@ -65,7 +65,6 @@ class DeconzFan(DeconzDevice[Light], FanEntity):
         | FanEntityFeature.TURN_ON
         | FanEntityFeature.TURN_OFF
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, device: Light, hub: DeconzHub) -> None:
         """Set up fan."""
diff --git a/homeassistant/components/demo/fan.py b/homeassistant/components/demo/fan.py
index 064ee3bb4f7..42e7f9e2434 100644
--- a/homeassistant/components/demo/fan.py
+++ b/homeassistant/components/demo/fan.py
@@ -100,7 +100,6 @@ class BaseDemoFan(FanEntity):
 
     _attr_should_poll = False
     _attr_translation_key = "demo"
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/esphome/fan.py b/homeassistant/components/esphome/fan.py
index 454c5edf030..c09145c17b5 100644
--- a/homeassistant/components/esphome/fan.py
+++ b/homeassistant/components/esphome/fan.py
@@ -45,7 +45,6 @@ class EsphomeFan(EsphomeEntity[FanInfo, FanState], FanEntity):
     """A fan implementation for ESPHome."""
 
     _supports_speed_levels: bool = True
-    _enable_turn_on_off_backwards_compatibility = False
 
     async def async_set_percentage(self, percentage: int) -> None:
         """Set the speed percentage of the fan."""
diff --git a/homeassistant/components/fan/__init__.py b/homeassistant/components/fan/__init__.py
index 71fb9c53353..863ae705603 100644
--- a/homeassistant/components/fan/__init__.py
+++ b/homeassistant/components/fan/__init__.py
@@ -2,7 +2,6 @@
 
 from __future__ import annotations
 
-import asyncio
 from datetime import timedelta
 from enum import IntFlag
 import functools as ft
@@ -25,7 +24,6 @@ from homeassistant.exceptions import ServiceValidationError
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.entity import ToggleEntity, ToggleEntityDescription
 from homeassistant.helpers.entity_component import EntityComponent
-from homeassistant.helpers.entity_platform import EntityPlatform
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.loader import bind_hass
 from homeassistant.util.hass_dict import HassKey
@@ -219,99 +217,6 @@ class FanEntity(ToggleEntity, cached_properties=CACHED_PROPERTIES_WITH_ATTR_):
     _attr_speed_count: int = 100
     _attr_supported_features: FanEntityFeature = FanEntityFeature(0)
 
-    __mod_supported_features: FanEntityFeature = FanEntityFeature(0)
-    # Integrations should set `_enable_turn_on_off_backwards_compatibility` to False
-    # once migrated and set the feature flags TURN_ON/TURN_OFF as needed.
-    _enable_turn_on_off_backwards_compatibility: bool = True
-
-    def __getattribute__(self, name: str, /) -> Any:
-        """Get attribute.
-
-        Modify return of `supported_features` to
-        include `_mod_supported_features` if attribute is set.
-        """
-        if name != "supported_features":
-            return super().__getattribute__(name)
-
-        # Convert the supported features to ClimateEntityFeature.
-        # Remove this compatibility shim in 2025.1 or later.
-        _supported_features: FanEntityFeature = super().__getattribute__(
-            "supported_features"
-        )
-        _mod_supported_features: FanEntityFeature = super().__getattribute__(
-            "_FanEntity__mod_supported_features"
-        )
-        if type(_supported_features) is int:  # noqa: E721
-            _features = FanEntityFeature(_supported_features)
-            self._report_deprecated_supported_features_values(_features)
-        else:
-            _features = _supported_features
-
-        if not _mod_supported_features:
-            return _features
-
-        # Add automatically calculated FanEntityFeature.TURN_OFF/TURN_ON to
-        # supported features and return it
-        return _features | _mod_supported_features
-
-    @callback
-    def add_to_platform_start(
-        self,
-        hass: HomeAssistant,
-        platform: EntityPlatform,
-        parallel_updates: asyncio.Semaphore | None,
-    ) -> None:
-        """Start adding an entity to a platform."""
-        super().add_to_platform_start(hass, platform, parallel_updates)
-
-        def _report_turn_on_off(feature: str, method: str) -> None:
-            """Log warning not implemented turn on/off feature."""
-            report_issue = self._suggest_report_issue()
-            message = (
-                "Entity %s (%s) does not set FanEntityFeature.%s"
-                " but implements the %s method. Please %s"
-            )
-            _LOGGER.warning(
-                message,
-                self.entity_id,
-                type(self),
-                feature,
-                method,
-                report_issue,
-            )
-
-        # Adds FanEntityFeature.TURN_OFF/TURN_ON depending on service calls implemented
-        # This should be removed in 2025.2.
-        if self._enable_turn_on_off_backwards_compatibility is False:
-            # Return if integration has migrated already
-            return
-
-        supported_features = self.supported_features
-        if supported_features & (FanEntityFeature.TURN_ON | FanEntityFeature.TURN_OFF):
-            # The entity supports both turn_on and turn_off, the backwards compatibility
-            # checks are not needed
-            return
-
-        if not supported_features & FanEntityFeature.TURN_OFF and (
-            type(self).async_turn_off is not ToggleEntity.async_turn_off
-            or type(self).turn_off is not ToggleEntity.turn_off
-        ):
-            # turn_off implicitly supported by implementing turn_off method
-            _report_turn_on_off("TURN_OFF", "turn_off")
-            self.__mod_supported_features |= (  # pylint: disable=unused-private-member
-                FanEntityFeature.TURN_OFF
-            )
-
-        if not supported_features & FanEntityFeature.TURN_ON and (
-            type(self).async_turn_on is not FanEntity.async_turn_on
-            or type(self).turn_on is not FanEntity.turn_on
-        ):
-            # turn_on implicitly supported by implementing turn_on method
-            _report_turn_on_off("TURN_ON", "turn_on")
-            self.__mod_supported_features |= (  # pylint: disable=unused-private-member
-                FanEntityFeature.TURN_ON
-            )
-
     def set_percentage(self, percentage: int) -> None:
         """Set the speed of the fan, as a percentage."""
         raise NotImplementedError
diff --git a/homeassistant/components/fjaraskupan/fan.py b/homeassistant/components/fjaraskupan/fan.py
index 864160cb464..540a7dd410d 100644
--- a/homeassistant/components/fjaraskupan/fan.py
+++ b/homeassistant/components/fjaraskupan/fan.py
@@ -71,7 +71,7 @@ class Fan(CoordinatorEntity[FjaraskupanCoordinator], FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
+
     _attr_has_entity_name = True
     _attr_name = None
 
diff --git a/homeassistant/components/freedompro/fan.py b/homeassistant/components/freedompro/fan.py
index 698d57d1001..d21ede9bad3 100644
--- a/homeassistant/components/freedompro/fan.py
+++ b/homeassistant/components/freedompro/fan.py
@@ -40,7 +40,6 @@ class FreedomproFan(CoordinatorEntity[FreedomproDataUpdateCoordinator], FanEntit
     _attr_name = None
     _attr_is_on = False
     _attr_percentage = 0
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/group/fan.py b/homeassistant/components/group/fan.py
index 03341b0f46b..87d9cb281f4 100644
--- a/homeassistant/components/group/fan.py
+++ b/homeassistant/components/group/fan.py
@@ -109,7 +109,6 @@ class FanGroup(GroupEntity, FanEntity):
     """Representation of a FanGroup."""
 
     _attr_available: bool = False
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, unique_id: str | None, name: str, entities: list[str]) -> None:
         """Initialize a FanGroup entity."""
diff --git a/homeassistant/components/homekit_controller/fan.py b/homeassistant/components/homekit_controller/fan.py
index 63de146a024..2ae534099ae 100644
--- a/homeassistant/components/homekit_controller/fan.py
+++ b/homeassistant/components/homekit_controller/fan.py
@@ -42,7 +42,6 @@ class BaseHomeKitFan(HomeKitEntity, FanEntity):
     # This must be set in subclasses to the name of a boolean characteristic
     # that controls whether the fan is on or off.
     on_characteristic: str
-    _enable_turn_on_off_backwards_compatibility = False
 
     @callback
     def _async_reconfigure(self) -> None:
diff --git a/homeassistant/components/insteon/fan.py b/homeassistant/components/insteon/fan.py
index c13e22bf8c5..0f1c70b9ea8 100644
--- a/homeassistant/components/insteon/fan.py
+++ b/homeassistant/components/insteon/fan.py
@@ -56,7 +56,6 @@ class InsteonFanEntity(InsteonEntity, FanEntity):
         | FanEntityFeature.TURN_ON
     )
     _attr_speed_count = 3
-    _enable_turn_on_off_backwards_compatibility = False
 
     @property
     def percentage(self) -> int | None:
diff --git a/homeassistant/components/intellifire/fan.py b/homeassistant/components/intellifire/fan.py
index dc2fc279a5d..c5bec07faaa 100644
--- a/homeassistant/components/intellifire/fan.py
+++ b/homeassistant/components/intellifire/fan.py
@@ -81,7 +81,6 @@ class IntellifireFan(IntellifireEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     @property
     def is_on(self) -> bool:
diff --git a/homeassistant/components/isy994/fan.py b/homeassistant/components/isy994/fan.py
index 1d8af78f83c..fc0406e2d5f 100644
--- a/homeassistant/components/isy994/fan.py
+++ b/homeassistant/components/isy994/fan.py
@@ -53,7 +53,6 @@ class ISYFanEntity(ISYNodeEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     @property
     def percentage(self) -> int | None:
diff --git a/homeassistant/components/knx/fan.py b/homeassistant/components/knx/fan.py
index ce17517b970..75d91e48048 100644
--- a/homeassistant/components/knx/fan.py
+++ b/homeassistant/components/knx/fan.py
@@ -43,7 +43,6 @@ class KNXFan(KnxYamlEntity, FanEntity):
     """Representation of a KNX fan."""
 
     _device: XknxFan
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, knx_module: KNXModule, config: ConfigType) -> None:
         """Initialize of KNX fan."""
diff --git a/homeassistant/components/lutron/fan.py b/homeassistant/components/lutron/fan.py
index dc881b393de..7db8b12c8d0 100644
--- a/homeassistant/components/lutron/fan.py
+++ b/homeassistant/components/lutron/fan.py
@@ -51,7 +51,6 @@ class LutronFan(LutronDevice, FanEntity):
     )
     _lutron_device: Output
     _prev_percentage: int | None = None
-    _enable_turn_on_off_backwards_compatibility = False
 
     def set_percentage(self, percentage: int) -> None:
         """Set the speed of the fan, as a percentage."""
diff --git a/homeassistant/components/lutron_caseta/fan.py b/homeassistant/components/lutron_caseta/fan.py
index e2bf7f15098..69167929e14 100644
--- a/homeassistant/components/lutron_caseta/fan.py
+++ b/homeassistant/components/lutron_caseta/fan.py
@@ -50,7 +50,6 @@ class LutronCasetaFan(LutronCasetaUpdatableEntity, FanEntity):
         | FanEntityFeature.TURN_ON
     )
     _attr_speed_count = len(ORDERED_NAMED_FAN_SPEEDS)
-    _enable_turn_on_off_backwards_compatibility = False
 
     @property
     def percentage(self) -> int | None:
diff --git a/homeassistant/components/matter/fan.py b/homeassistant/components/matter/fan.py
index 51c2fb0c882..593693dbbf9 100644
--- a/homeassistant/components/matter/fan.py
+++ b/homeassistant/components/matter/fan.py
@@ -58,7 +58,7 @@ class MatterFan(MatterEntity, FanEntity):
 
     _last_known_preset_mode: str | None = None
     _last_known_percentage: int = 0
-    _enable_turn_on_off_backwards_compatibility = False
+
     _feature_map: int | None = None
     _platform_translation_key = "fan"
 
diff --git a/homeassistant/components/modbus/fan.py b/homeassistant/components/modbus/fan.py
index 5d12fe37fd1..bed8ff102bb 100644
--- a/homeassistant/components/modbus/fan.py
+++ b/homeassistant/components/modbus/fan.py
@@ -38,8 +38,6 @@ async def async_setup_platform(
 class ModbusFan(BaseSwitch, FanEntity):
     """Class representing a Modbus fan."""
 
-    _enable_turn_on_off_backwards_compatibility = False
-
     def __init__(
         self, hass: HomeAssistant, hub: ModbusHub, config: dict[str, Any]
     ) -> None:
diff --git a/homeassistant/components/modern_forms/fan.py b/homeassistant/components/modern_forms/fan.py
index a599c5b6dd6..988edcb60e5 100644
--- a/homeassistant/components/modern_forms/fan.py
+++ b/homeassistant/components/modern_forms/fan.py
@@ -78,7 +78,6 @@ class ModernFormsFanEntity(FanEntity, ModernFormsDeviceEntity):
         | FanEntityFeature.TURN_ON
     )
     _attr_translation_key = "fan"
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self, entry_id: str, coordinator: ModernFormsDataUpdateCoordinator
diff --git a/homeassistant/components/mqtt/fan.py b/homeassistant/components/mqtt/fan.py
index b3c0f22789c..4d2e764a0d5 100644
--- a/homeassistant/components/mqtt/fan.py
+++ b/homeassistant/components/mqtt/fan.py
@@ -226,7 +226,6 @@ class MqttFan(MqttEntity, FanEntity):
     _optimistic_preset_mode: bool
     _payload: dict[str, Any]
     _speed_range: tuple[int, int]
-    _enable_turn_on_off_backwards_compatibility = False
 
     @staticmethod
     def config_schema() -> VolSchemaType:
diff --git a/homeassistant/components/netatmo/fan.py b/homeassistant/components/netatmo/fan.py
index 8610882a453..71a8c548622 100644
--- a/homeassistant/components/netatmo/fan.py
+++ b/homeassistant/components/netatmo/fan.py
@@ -51,7 +51,6 @@ class NetatmoFan(NetatmoModuleEntity, FanEntity):
     _attr_configuration_url = CONF_URL_CONTROL
     _attr_name = None
     device: NaModules.Fan
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, netatmo_device: NetatmoDevice) -> None:
         """Initialize of Netatmo fan."""
diff --git a/homeassistant/components/rabbitair/fan.py b/homeassistant/components/rabbitair/fan.py
index ba1896cba2f..cfbee0be67c 100644
--- a/homeassistant/components/rabbitair/fan.py
+++ b/homeassistant/components/rabbitair/fan.py
@@ -55,7 +55,6 @@ class RabbitAirFanEntity(RabbitAirBaseEntity, FanEntity):
         | FanEntityFeature.TURN_ON
         | FanEntityFeature.TURN_OFF
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/renson/fan.py b/homeassistant/components/renson/fan.py
index 44bea28ce3c..56b3655ef94 100644
--- a/homeassistant/components/renson/fan.py
+++ b/homeassistant/components/renson/fan.py
@@ -127,7 +127,6 @@ class RensonFan(RensonEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, api: RensonVentilation, coordinator: RensonCoordinator) -> None:
         """Initialize the Renson fan."""
diff --git a/homeassistant/components/smartthings/fan.py b/homeassistant/components/smartthings/fan.py
index 131cccdd869..61e30589273 100644
--- a/homeassistant/components/smartthings/fan.py
+++ b/homeassistant/components/smartthings/fan.py
@@ -70,7 +70,6 @@ class SmartThingsFan(SmartThingsEntity, FanEntity):
     """Define a SmartThings Fan."""
 
     _attr_speed_count = int_states_in_range(SPEED_RANGE)
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, device):
         """Init the class."""
diff --git a/homeassistant/components/smarty/fan.py b/homeassistant/components/smarty/fan.py
index 378585a33e1..2804f14ee15 100644
--- a/homeassistant/components/smarty/fan.py
+++ b/homeassistant/components/smarty/fan.py
@@ -48,7 +48,6 @@ class SmartyFan(SmartyEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, coordinator: SmartyCoordinator) -> None:
         """Initialize the entity."""
diff --git a/homeassistant/components/snooz/fan.py b/homeassistant/components/snooz/fan.py
index 8c721432709..bfe773b4780 100644
--- a/homeassistant/components/snooz/fan.py
+++ b/homeassistant/components/snooz/fan.py
@@ -83,7 +83,6 @@ class SnoozFan(FanEntity, RestoreEntity):
     _attr_should_poll = False
     _is_on: bool | None = None
     _percentage: int | None = None
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, data: SnoozConfigurationData) -> None:
         """Initialize a Snooz fan entity."""
diff --git a/homeassistant/components/switch_as_x/fan.py b/homeassistant/components/switch_as_x/fan.py
index 91d3a4d119a..858379e71df 100644
--- a/homeassistant/components/switch_as_x/fan.py
+++ b/homeassistant/components/switch_as_x/fan.py
@@ -46,7 +46,6 @@ class FanSwitch(BaseToggleEntity, FanEntity):
     """Represents a Switch as a Fan."""
 
     _attr_supported_features = FanEntityFeature.TURN_OFF | FanEntityFeature.TURN_ON
-    _enable_turn_on_off_backwards_compatibility = False
 
     @property
     def is_on(self) -> bool | None:
diff --git a/homeassistant/components/tasmota/fan.py b/homeassistant/components/tasmota/fan.py
index 15664201d99..e927bd6ad72 100644
--- a/homeassistant/components/tasmota/fan.py
+++ b/homeassistant/components/tasmota/fan.py
@@ -72,7 +72,6 @@ class TasmotaFan(
     )
     _fan_speed = tasmota_const.FAN_SPEED_MEDIUM
     _tasmota_entity: tasmota_fan.TasmotaFan
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, **kwds: Any) -> None:
         """Initialize the Tasmota fan."""
diff --git a/homeassistant/components/template/fan.py b/homeassistant/components/template/fan.py
index cedd7d0d725..7720ef7e1b3 100644
--- a/homeassistant/components/template/fan.py
+++ b/homeassistant/components/template/fan.py
@@ -124,7 +124,6 @@ class TemplateFan(TemplateEntity, FanEntity):
     """A template fan component."""
 
     _attr_should_poll = False
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/tolo/fan.py b/homeassistant/components/tolo/fan.py
index 9b62346a83b..9e48778b507 100644
--- a/homeassistant/components/tolo/fan.py
+++ b/homeassistant/components/tolo/fan.py
@@ -29,7 +29,6 @@ class ToloFan(ToloSaunaCoordinatorEntity, FanEntity):
 
     _attr_translation_key = "fan"
     _attr_supported_features = FanEntityFeature.TURN_OFF | FanEntityFeature.TURN_ON
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self, coordinator: ToloSaunaUpdateCoordinator, entry: ConfigEntry
diff --git a/homeassistant/components/tplink/fan.py b/homeassistant/components/tplink/fan.py
index f90eadbc531..64ad01eb671 100644
--- a/homeassistant/components/tplink/fan.py
+++ b/homeassistant/components/tplink/fan.py
@@ -64,7 +64,6 @@ class TPLinkFanEntity(CoordinatedTPLinkEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/tradfri/fan.py b/homeassistant/components/tradfri/fan.py
index 75616607ee8..3f45ee3e1eb 100644
--- a/homeassistant/components/tradfri/fan.py
+++ b/homeassistant/components/tradfri/fan.py
@@ -69,7 +69,6 @@ class TradfriAirPurifierFan(TradfriBaseEntity, FanEntity):
     # ... with step size 1
     # 50 = Max
     _attr_speed_count = ATTR_MAX_FAN_STEPS
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/tuya/fan.py b/homeassistant/components/tuya/fan.py
index 4a6de1cae09..ffab9efdde8 100644
--- a/homeassistant/components/tuya/fan.py
+++ b/homeassistant/components/tuya/fan.py
@@ -66,7 +66,6 @@ class TuyaFanEntity(TuyaEntity, FanEntity):
     _speeds: EnumTypeData | None = None
     _switch: DPCode | None = None
     _attr_name = None
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/vallox/fan.py b/homeassistant/components/vallox/fan.py
index 5fac46177cb..3a21ef060a7 100644
--- a/homeassistant/components/vallox/fan.py
+++ b/homeassistant/components/vallox/fan.py
@@ -83,7 +83,6 @@ class ValloxFanEntity(ValloxEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/vesync/fan.py b/homeassistant/components/vesync/fan.py
index 098a17e90f0..5be6a06e1d0 100644
--- a/homeassistant/components/vesync/fan.py
+++ b/homeassistant/components/vesync/fan.py
@@ -95,7 +95,6 @@ class VeSyncFanHA(VeSyncDevice, FanEntity):
     )
     _attr_name = None
     _attr_translation_key = "vesync"
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, fan) -> None:
         """Initialize the VeSync fan device."""
diff --git a/homeassistant/components/vicare/fan.py b/homeassistant/components/vicare/fan.py
index 1800704a16f..6e8513a1f7e 100644
--- a/homeassistant/components/vicare/fan.py
+++ b/homeassistant/components/vicare/fan.py
@@ -125,7 +125,6 @@ class ViCareFan(ViCareEntity, FanEntity):
     _attr_speed_count = len(ORDERED_NAMED_FAN_SPEEDS)
     _attr_supported_features = FanEntityFeature.SET_SPEED
     _attr_translation_key = "ventilation"
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self,
diff --git a/homeassistant/components/wemo/fan.py b/homeassistant/components/wemo/fan.py
index f9d3270aaa0..42dae679aa5 100644
--- a/homeassistant/components/wemo/fan.py
+++ b/homeassistant/components/wemo/fan.py
@@ -81,7 +81,6 @@ class WemoHumidifier(WemoBinaryStateEntity, FanEntity):
     )
     wemo: Humidifier
     _last_fan_on_mode: FanMode
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, coordinator: DeviceCoordinator) -> None:
         """Initialize the WeMo switch."""
diff --git a/homeassistant/components/wilight/fan.py b/homeassistant/components/wilight/fan.py
index 71f1098603b..a14198e3b5d 100644
--- a/homeassistant/components/wilight/fan.py
+++ b/homeassistant/components/wilight/fan.py
@@ -64,7 +64,6 @@ class WiLightFan(WiLightDevice, FanEntity):
         | FanEntityFeature.TURN_ON
         | FanEntityFeature.TURN_OFF
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, api_device: PyWiLightDevice, index: str, item_name: str) -> None:
         """Initialize the device."""
diff --git a/homeassistant/components/xiaomi_miio/fan.py b/homeassistant/components/xiaomi_miio/fan.py
index 81ca38eb053..e1de3f56252 100644
--- a/homeassistant/components/xiaomi_miio/fan.py
+++ b/homeassistant/components/xiaomi_miio/fan.py
@@ -300,7 +300,6 @@ class XiaomiGenericDevice(XiaomiCoordinatedMiioEntity, FanEntity):
     """Representation of a generic Xiaomi device."""
 
     _attr_name = None
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, device, entry, unique_id, coordinator):
         """Initialize the generic Xiaomi device."""
diff --git a/homeassistant/components/zha/fan.py b/homeassistant/components/zha/fan.py
index 767c0d4cfb7..73b23e97387 100644
--- a/homeassistant/components/zha/fan.py
+++ b/homeassistant/components/zha/fan.py
@@ -47,7 +47,6 @@ class ZhaFan(FanEntity, ZHAEntity):
     """Representation of a ZHA fan."""
 
     _attr_translation_key: str = "fan"
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, entity_data: EntityData) -> None:
         """Initialize the ZHA fan."""
diff --git a/homeassistant/components/zwave_js/fan.py b/homeassistant/components/zwave_js/fan.py
index 37d3fc57886..d83132e4b95 100644
--- a/homeassistant/components/zwave_js/fan.py
+++ b/homeassistant/components/zwave_js/fan.py
@@ -83,7 +83,6 @@ class ZwaveFan(ZWaveBaseEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(
         self, config_entry: ConfigEntry, driver: Driver, info: ZwaveDiscoveryInfo
diff --git a/homeassistant/components/zwave_me/fan.py b/homeassistant/components/zwave_me/fan.py
index 1016586ab55..bd0feba0dfb 100644
--- a/homeassistant/components/zwave_me/fan.py
+++ b/homeassistant/components/zwave_me/fan.py
@@ -49,7 +49,6 @@ class ZWaveMeFan(ZWaveMeEntity, FanEntity):
         | FanEntityFeature.TURN_OFF
         | FanEntityFeature.TURN_ON
     )
-    _enable_turn_on_off_backwards_compatibility = False
 
     @property
     def percentage(self) -> int:
diff --git a/tests/components/fan/test_init.py b/tests/components/fan/test_init.py
index fbb09ab879c..90061ec60a1 100644
--- a/tests/components/fan/test_init.py
+++ b/tests/components/fan/test_init.py
@@ -1,7 +1,5 @@
 """Tests for fan platforms."""
 
-from unittest.mock import patch
-
 import pytest
 
 from homeassistant.components.fan import (
@@ -13,23 +11,13 @@ from homeassistant.components.fan import (
     FanEntityFeature,
     NotValidPresetModeError,
 )
-from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import SERVICE_TURN_OFF, SERVICE_TURN_ON
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers.entity_platform import AddEntitiesCallback
 import homeassistant.helpers.entity_registry as er
 from homeassistant.setup import async_setup_component
 
 from .common import MockFan
 
-from tests.common import (
-    MockConfigEntry,
-    MockModule,
-    MockPlatform,
-    mock_integration,
-    mock_platform,
-    setup_test_component_platform,
-)
+from tests.common import setup_test_component_platform
 
 
 class BaseFan(FanEntity):
@@ -161,300 +149,3 @@ async def test_preset_mode_validation(
     with pytest.raises(NotValidPresetModeError) as exc:
         await test_fan._valid_preset_mode_or_raise("invalid")
     assert exc.value.translation_key == "not_valid_preset_mode"
-
-
-def test_deprecated_supported_features_ints(caplog: pytest.LogCaptureFixture) -> None:
-    """Test deprecated supported features ints."""
-
-    class MockFan(FanEntity):
-        @property
-        def supported_features(self) -> int:
-            """Return supported features."""
-            return 1
-
-    entity = MockFan()
-    assert entity.supported_features is FanEntityFeature(1)
-    assert "MockFan" in caplog.text
-    assert "is using deprecated supported features values" in caplog.text
-    assert "Instead it should use" in caplog.text
-    assert "FanEntityFeature.SET_SPEED" in caplog.text
-    caplog.clear()
-    assert entity.supported_features is FanEntityFeature(1)
-    assert "is using deprecated supported features values" not in caplog.text
-
-
-async def test_warning_not_implemented_turn_on_off_feature(
-    hass: HomeAssistant, caplog: pytest.LogCaptureFixture, config_flow_fixture: None
-) -> None:
-    """Test adding feature flag and warn if missing when methods are set."""
-
-    called = []
-
-    class MockFanEntityTest(MockFan):
-        """Mock Fan device."""
-
-        def turn_on(
-            self,
-            percentage: int | None = None,
-            preset_mode: str | None = None,
-        ) -> None:
-            """Turn on."""
-            called.append("turn_on")
-
-        def turn_off(self) -> None:
-            """Turn off."""
-            called.append("turn_off")
-
-    async def async_setup_entry_init(
-        hass: HomeAssistant, config_entry: ConfigEntry
-    ) -> bool:
-        """Set up test config entry."""
-        await hass.config_entries.async_forward_entry_setups(config_entry, [DOMAIN])
-        return True
-
-    async def async_setup_entry_fan_platform(
-        hass: HomeAssistant,
-        config_entry: ConfigEntry,
-        async_add_entities: AddEntitiesCallback,
-    ) -> None:
-        """Set up test fan platform via config entry."""
-        async_add_entities([MockFanEntityTest(name="test", entity_id="fan.test")])
-
-    mock_integration(
-        hass,
-        MockModule(
-            "test",
-            async_setup_entry=async_setup_entry_init,
-        ),
-        built_in=False,
-    )
-    mock_platform(
-        hass,
-        "test.fan",
-        MockPlatform(async_setup_entry=async_setup_entry_fan_platform),
-    )
-
-    with patch.object(
-        MockFanEntityTest, "__module__", "tests.custom_components.fan.test_init"
-    ):
-        config_entry = MockConfigEntry(domain="test")
-        config_entry.add_to_hass(hass)
-        assert await hass.config_entries.async_setup(config_entry.entry_id)
-        await hass.async_block_till_done()
-
-    state = hass.states.get("fan.test")
-    assert state is not None
-
-    assert (
-        "Entity fan.test (<class 'tests.custom_components.fan.test_init.test_warning_not_implemented_turn_on_off_feature.<locals>.MockFanEntityTest'>) "
-        "does not set FanEntityFeature.TURN_OFF but implements the turn_off method. Please report it to the author of the 'test' custom integration"
-        in caplog.text
-    )
-    assert (
-        "Entity fan.test (<class 'tests.custom_components.fan.test_init.test_warning_not_implemented_turn_on_off_feature.<locals>.MockFanEntityTest'>) "
-        "does not set FanEntityFeature.TURN_ON but implements the turn_on method. Please report it to the author of the 'test' custom integration"
-        in caplog.text
-    )
-
-    await hass.services.async_call(
-        DOMAIN,
-        SERVICE_TURN_ON,
-        {
-            "entity_id": "fan.test",
-        },
-        blocking=True,
-    )
-    await hass.services.async_call(
-        DOMAIN,
-        SERVICE_TURN_OFF,
-        {
-            "entity_id": "fan.test",
-        },
-        blocking=True,
-    )
-
-    assert len(called) == 2
-    assert "turn_on" in called
-    assert "turn_off" in called
-
-
-async def test_no_warning_implemented_turn_on_off_feature(
-    hass: HomeAssistant, caplog: pytest.LogCaptureFixture, config_flow_fixture: None
-) -> None:
-    """Test no warning when feature flags are set."""
-
-    class MockFanEntityTest(MockFan):
-        """Mock Fan device."""
-
-        _attr_supported_features = (
-            FanEntityFeature.DIRECTION
-            | FanEntityFeature.OSCILLATE
-            | FanEntityFeature.SET_SPEED
-            | FanEntityFeature.PRESET_MODE
-            | FanEntityFeature.TURN_OFF
-            | FanEntityFeature.TURN_ON
-        )
-
-    async def async_setup_entry_init(
-        hass: HomeAssistant, config_entry: ConfigEntry
-    ) -> bool:
-        """Set up test config entry."""
-        await hass.config_entries.async_forward_entry_setups(config_entry, [DOMAIN])
-        return True
-
-    async def async_setup_entry_fan_platform(
-        hass: HomeAssistant,
-        config_entry: ConfigEntry,
-        async_add_entities: AddEntitiesCallback,
-    ) -> None:
-        """Set up test fan platform via config entry."""
-        async_add_entities([MockFanEntityTest(name="test", entity_id="fan.test")])
-
-    mock_integration(
-        hass,
-        MockModule(
-            "test",
-            async_setup_entry=async_setup_entry_init,
-        ),
-        built_in=False,
-    )
-    mock_platform(
-        hass,
-        "test.fan",
-        MockPlatform(async_setup_entry=async_setup_entry_fan_platform),
-    )
-
-    with patch.object(
-        MockFanEntityTest, "__module__", "tests.custom_components.fan.test_init"
-    ):
-        config_entry = MockConfigEntry(domain="test")
-        config_entry.add_to_hass(hass)
-        assert await hass.config_entries.async_setup(config_entry.entry_id)
-        await hass.async_block_till_done()
-
-    state = hass.states.get("fan.test")
-    assert state is not None
-
-    assert "does not set FanEntityFeature.TURN_OFF" not in caplog.text
-    assert "does not set FanEntityFeature.TURN_ON" not in caplog.text
-
-
-async def test_no_warning_integration_has_migrated(
-    hass: HomeAssistant, caplog: pytest.LogCaptureFixture, config_flow_fixture: None
-) -> None:
-    """Test no warning when integration migrated using `_enable_turn_on_off_backwards_compatibility`."""
-
-    class MockFanEntityTest(MockFan):
-        """Mock Fan device."""
-
-        _enable_turn_on_off_backwards_compatibility = False
-        _attr_supported_features = (
-            FanEntityFeature.DIRECTION
-            | FanEntityFeature.OSCILLATE
-            | FanEntityFeature.SET_SPEED
-            | FanEntityFeature.PRESET_MODE
-        )
-
-    async def async_setup_entry_init(
-        hass: HomeAssistant, config_entry: ConfigEntry
-    ) -> bool:
-        """Set up test config entry."""
-        await hass.config_entries.async_forward_entry_setups(config_entry, [DOMAIN])
-        return True
-
-    async def async_setup_entry_fan_platform(
-        hass: HomeAssistant,
-        config_entry: ConfigEntry,
-        async_add_entities: AddEntitiesCallback,
-    ) -> None:
-        """Set up test fan platform via config entry."""
-        async_add_entities([MockFanEntityTest(name="test", entity_id="fan.test")])
-
-    mock_integration(
-        hass,
-        MockModule(
-            "test",
-            async_setup_entry=async_setup_entry_init,
-        ),
-        built_in=False,
-    )
-    mock_platform(
-        hass,
-        "test.fan",
-        MockPlatform(async_setup_entry=async_setup_entry_fan_platform),
-    )
-
-    with patch.object(
-        MockFanEntityTest, "__module__", "tests.custom_components.fan.test_init"
-    ):
-        config_entry = MockConfigEntry(domain="test")
-        config_entry.add_to_hass(hass)
-        assert await hass.config_entries.async_setup(config_entry.entry_id)
-        await hass.async_block_till_done()
-
-    state = hass.states.get("fan.test")
-    assert state is not None
-
-    assert "does not set FanEntityFeature.TURN_OFF" not in caplog.text
-    assert "does not set FanEntityFeature.TURN_ON" not in caplog.text
-
-
-async def test_no_warning_integration_implement_feature_flags(
-    hass: HomeAssistant, caplog: pytest.LogCaptureFixture, config_flow_fixture: None
-) -> None:
-    """Test no warning when integration uses the correct feature flags."""
-
-    class MockFanEntityTest(MockFan):
-        """Mock Fan device."""
-
-        _attr_supported_features = (
-            FanEntityFeature.DIRECTION
-            | FanEntityFeature.OSCILLATE
-            | FanEntityFeature.SET_SPEED
-            | FanEntityFeature.PRESET_MODE
-            | FanEntityFeature.TURN_OFF
-            | FanEntityFeature.TURN_ON
-        )
-
-    async def async_setup_entry_init(
-        hass: HomeAssistant, config_entry: ConfigEntry
-    ) -> bool:
-        """Set up test config entry."""
-        await hass.config_entries.async_forward_entry_setups(config_entry, [DOMAIN])
-        return True
-
-    async def async_setup_entry_fan_platform(
-        hass: HomeAssistant,
-        config_entry: ConfigEntry,
-        async_add_entities: AddEntitiesCallback,
-    ) -> None:
-        """Set up test fan platform via config entry."""
-        async_add_entities([MockFanEntityTest(name="test", entity_id="fan.test")])
-
-    mock_integration(
-        hass,
-        MockModule(
-            "test",
-            async_setup_entry=async_setup_entry_init,
-        ),
-        built_in=False,
-    )
-    mock_platform(
-        hass,
-        "test.fan",
-        MockPlatform(async_setup_entry=async_setup_entry_fan_platform),
-    )
-
-    with patch.object(
-        MockFanEntityTest, "__module__", "tests.custom_components.fan.test_init"
-    ):
-        config_entry = MockConfigEntry(domain="test")
-        config_entry.add_to_hass(hass)
-        assert await hass.config_entries.async_setup(config_entry.entry_id)
-        await hass.async_block_till_done()
-
-    state = hass.states.get("fan.test")
-    assert state is not None
-
-    assert "does not set FanEntityFeature.TURN_OFF" not in caplog.text
-    assert "does not set FanEntityFeature.TURN_ON" not in caplog.text