diff --git a/homeassistant/components/fan/__init__.py b/homeassistant/components/fan/__init__.py
index 20a11fd89f1..248e7d095d0 100644
--- a/homeassistant/components/fan/__init__.py
+++ b/homeassistant/components/fan/__init__.py
@@ -246,7 +246,7 @@ class FanEntity(ToggleEntity):
             await self.async_turn_off()
             return
 
-        if speed in self.preset_modes:
+        if self.preset_modes and speed in self.preset_modes:
             if not hasattr(self.async_set_preset_mode, _FAN_NATIVE):
                 await self.async_set_preset_mode(speed)
                 return
@@ -375,7 +375,7 @@ class FanEntity(ToggleEntity):
             _LOGGER.warning(
                 "Calling fan.turn_on with the speed argument is deprecated, use percentage or preset_mode instead"
             )
-            if speed in self.preset_modes:
+            if self.preset_modes and speed in self.preset_modes:
                 preset_mode = speed
                 percentage = None
             else:
@@ -463,9 +463,13 @@ class FanEntity(ToggleEntity):
     @property
     def percentage(self) -> int | None:
         """Return the current speed as a percentage."""
-        if not self._implemented_preset_mode and self.speed in self.preset_modes:
+        if (
+            not self._implemented_preset_mode
+            and self.preset_modes
+            and self.speed in self.preset_modes
+        ):
             return None
-        if not self._implemented_percentage:
+        if self.speed is not None and not self._implemented_percentage:
             return self.speed_to_percentage(self.speed)
         return 0
 
@@ -488,7 +492,7 @@ class FanEntity(ToggleEntity):
         speeds = []
         if self._implemented_percentage:
             speeds += [SPEED_OFF, *LEGACY_SPEED_LIST]
-        if self._implemented_preset_mode:
+        if self._implemented_preset_mode and self.preset_modes:
             speeds += self.preset_modes
         return speeds
 
@@ -594,7 +598,7 @@ class FanEntity(ToggleEntity):
     @property
     def state_attributes(self) -> dict:
         """Return optional state attributes."""
-        data = {}
+        data: dict[str, float | str | None] = {}
         supported_features = self.supported_features
 
         if supported_features & SUPPORT_DIRECTION:
@@ -628,7 +632,7 @@ class FanEntity(ToggleEntity):
         Requires SUPPORT_SET_SPEED.
         """
         speed = self.speed
-        if speed in self.preset_modes:
+        if self.preset_modes and speed in self.preset_modes:
             return speed
         return None
 
diff --git a/mypy.ini b/mypy.ini
index cb3bf6ec698..4c693dcc5ee 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1159,9 +1159,6 @@ ignore_errors = true
 [mypy-homeassistant.components.evohome.*]
 ignore_errors = true
 
-[mypy-homeassistant.components.fan.*]
-ignore_errors = true
-
 [mypy-homeassistant.components.filter.*]
 ignore_errors = true
 
diff --git a/script/hassfest/mypy_config.py b/script/hassfest/mypy_config.py
index d234f96589a..1873ebd46c1 100644
--- a/script/hassfest/mypy_config.py
+++ b/script/hassfest/mypy_config.py
@@ -52,7 +52,6 @@ IGNORED_MODULES: Final[list[str]] = [
     "homeassistant.components.entur_public_transport.*",
     "homeassistant.components.esphome.*",
     "homeassistant.components.evohome.*",
-    "homeassistant.components.fan.*",
     "homeassistant.components.filter.*",
     "homeassistant.components.fints.*",
     "homeassistant.components.fireservicerota.*",