diff --git a/homeassistant/components/tradfri/fan.py b/homeassistant/components/tradfri/fan.py
index cc893657aba..f4bec48f25f 100644
--- a/homeassistant/components/tradfri/fan.py
+++ b/homeassistant/components/tradfri/fan.py
@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from typing import Any, cast
+from typing import Any
 
 from pytradfri.api.aiocoap_api import APIRequestProtocol
 
@@ -83,37 +83,30 @@ class TradfriAirPurifierFan(TradfriBaseEntity, FanEntity):
             gateway_id=gateway_id,
         )
 
-        self._device_control = self._device.air_purifier_control
-        self._device_data = self._device_control.air_purifiers[0]
+        device_control = self._device.air_purifier_control
+        assert (
+            device_control  # air_purifier_control is ensured when creating the entity
+        )
+        self._device_control = device_control
+        self._device_data = device_control.air_purifiers[0]
 
     def _refresh(self) -> None:
         """Refresh the device."""
-        self._device_data = self.coordinator.data.air_purifier_control.air_purifiers[0]
+        self._device_data = self._device_control.air_purifiers[0]
 
     @property
     def is_on(self) -> bool:
         """Return true if switch is on."""
-        if not self._device_data:
-            return False
-        return cast(bool, self._device_data.state)
+        return self._device_data.state
 
     @property
-    def percentage(self) -> int | None:
+    def percentage(self) -> int:
         """Return the current speed percentage."""
-        if not self._device_data:
-            return None
-
-        if self._device_data.fan_speed:
-            return _from_fan_speed(self._device_data.fan_speed)
-
-        return None
+        return _from_fan_speed(self._device_data.fan_speed)
 
     @property
     def preset_mode(self) -> str | None:
         """Return the current preset mode."""
-        if not self._device_data:
-            return None
-
         if self._device_data.is_auto_mode:
             return ATTR_AUTO
 
@@ -121,10 +114,8 @@ class TradfriAirPurifierFan(TradfriBaseEntity, FanEntity):
 
     async def async_set_preset_mode(self, preset_mode: str) -> None:
         """Set the preset mode of the fan."""
-        if not self._device_control:
-            return
-
-        # Preset must be 'Auto'
+        if not preset_mode == ATTR_AUTO:
+            raise ValueError("Preset must be 'Auto'.")
 
         await self._api(self._device_control.turn_on_auto_mode())
 
@@ -135,9 +126,6 @@ class TradfriAirPurifierFan(TradfriBaseEntity, FanEntity):
         **kwargs: Any,
     ) -> None:
         """Turn on the fan. Auto-mode if no argument is given."""
-        if not self._device_control:
-            return
-
         if percentage is not None:
             await self.async_set_percentage(percentage)
             return
@@ -147,9 +135,6 @@ class TradfriAirPurifierFan(TradfriBaseEntity, FanEntity):
 
     async def async_set_percentage(self, percentage: int) -> None:
         """Set the speed percentage of the fan."""
-        if not self._device_control:
-            return
-
         if percentage == 0:
             await self.async_turn_off()
             return
@@ -160,6 +145,4 @@ class TradfriAirPurifierFan(TradfriBaseEntity, FanEntity):
 
     async def async_turn_off(self, **kwargs: Any) -> None:
         """Turn off the fan."""
-        if not self._device_control:
-            return
         await self._api(self._device_control.turn_off())