From 48d207f250f99d8126702342c05a6be6e877e4d5 Mon Sep 17 00:00:00 2001
From: epenet <6771947+epenet@users.noreply.github.com>
Date: Wed, 22 Jun 2022 09:52:34 +0000
Subject: [PATCH] Adjust is_on

---
 homeassistant/components/fan/__init__.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/homeassistant/components/fan/__init__.py b/homeassistant/components/fan/__init__.py
index 55732041131..32baa5099c5 100644
--- a/homeassistant/components/fan/__init__.py
+++ b/homeassistant/components/fan/__init__.py
@@ -80,10 +80,11 @@ class NotValidPresetModeError(ValueError):
 
 
 @bind_hass
-def is_on(hass: HomeAssistant, entity_id: str) -> bool:
+def is_on(hass: HomeAssistant, entity_id: str) -> bool | None:
     """Return if the fans are on based on the statemachine."""
     entity = hass.states.get(entity_id)
-    assert entity
+    if entity is None:
+        return None
     return entity.state == STATE_ON