diff --git a/homeassistant/components/zwave_js/humidifier.py b/homeassistant/components/zwave_js/humidifier.py
index b94c7a8e2a3622..44d7bc19bbb19b 100644
--- a/homeassistant/components/zwave_js/humidifier.py
+++ b/homeassistant/components/zwave_js/humidifier.py
@@ -150,10 +150,9 @@ def __init__(
     @property
     def is_on(self) -> bool | None:
         """Return True if entity is on."""
-        return int(self._current_mode.value) in [
-            self.entity_description.on_mode,
-            HumidityControlMode.AUTO,
-        ]
+        if (value := self._current_mode.value) is None:
+            return None
+        return int(value) in [self.entity_description.on_mode, HumidityControlMode.AUTO]
 
     def _supports_inverse_mode(self) -> bool:
         return (
@@ -163,7 +162,9 @@ def _supports_inverse_mode(self) -> bool:
 
     async def async_turn_on(self, **kwargs: Any) -> None:
         """Turn on device."""
-        mode = int(self._current_mode.value)
+        if (value := self._current_mode.value) is None:
+            return
+        mode = int(value)
         if mode == HumidityControlMode.OFF:
             new_mode = self.entity_description.on_mode
         elif mode == self.entity_description.inverse_mode:
@@ -175,7 +176,9 @@ async def async_turn_on(self, **kwargs: Any) -> None:
 
     async def async_turn_off(self, **kwargs: Any) -> None:
         """Turn off device."""
-        mode = int(self._current_mode.value)
+        if (value := self._current_mode.value) is None:
+            return
+        mode = int(value)
         if mode == HumidityControlMode.AUTO:
             if self._supports_inverse_mode():
                 new_mode = self.entity_description.inverse_mode
@@ -191,7 +194,7 @@ async def async_turn_off(self, **kwargs: Any) -> None:
     @property
     def target_humidity(self) -> int | None:
         """Return the humidity we try to reach."""
-        if not self._setpoint:
+        if not self._setpoint or self._setpoint.value is None:
             return None
         return int(self._setpoint.value)