diff --git a/custom_components/gree/climate.py b/custom_components/gree/climate.py
index 539373e..fa0e397 100644
--- a/custom_components/gree/climate.py
+++ b/custom_components/gree/climate.py
@@ -511,7 +511,7 @@ async def SyncState(self, acOptions={}):
             except Exception:
                 _LOGGER.debug("Could not determine whether device has a built-in light sensor. Retrying at next update()")
             else:
-                if light_sensor:
+                if light_sensor is not None:
                     self._has_light_sensor = True
                     self._acOptions.update({"LigSen": None})
                     self._optionsToFetch.append("LigSen")