diff --git a/homeassistant/components/fritzbox/__init__.py b/homeassistant/components/fritzbox/__init__.py
index 087faeb2be9..cef325a61f3 100644
--- a/homeassistant/components/fritzbox/__init__.py
+++ b/homeassistant/components/fritzbox/__init__.py
@@ -143,6 +143,11 @@ class FritzBoxEntity(CoordinatorEntity):
         self._device_class = entity_info[ATTR_DEVICE_CLASS]
         self._attr_state_class = entity_info[ATTR_STATE_CLASS]
 
+    @property
+    def available(self) -> bool:
+        """Return if entity is available."""
+        return super().available and self.device.present
+
     @property
     def device(self) -> FritzhomeDevice:
         """Return device object from coordinator."""
diff --git a/homeassistant/components/fritzbox/binary_sensor.py b/homeassistant/components/fritzbox/binary_sensor.py
index f6dbaed97cf..5514408cb3c 100644
--- a/homeassistant/components/fritzbox/binary_sensor.py
+++ b/homeassistant/components/fritzbox/binary_sensor.py
@@ -54,6 +54,4 @@ class FritzboxBinarySensor(FritzBoxEntity, BinarySensorEntity):
     @property
     def is_on(self) -> bool:
         """Return true if sensor is on."""
-        if not self.device.present:
-            return False
         return self.device.alert_state  # type: ignore [no-any-return]
diff --git a/homeassistant/components/fritzbox/climate.py b/homeassistant/components/fritzbox/climate.py
index 0551c5e0455..4baa1b3b81a 100644
--- a/homeassistant/components/fritzbox/climate.py
+++ b/homeassistant/components/fritzbox/climate.py
@@ -93,11 +93,6 @@ class FritzboxThermostat(FritzBoxEntity, ClimateEntity):
         """Return the list of supported features."""
         return SUPPORT_FLAGS
 
-    @property
-    def available(self) -> bool:
-        """Return if thermostat is available."""
-        return self.device.present  # type: ignore [no-any-return]
-
     @property
     def temperature_unit(self) -> str:
         """Return the unit of measurement that is used."""
diff --git a/homeassistant/components/fritzbox/sensor.py b/homeassistant/components/fritzbox/sensor.py
index d325e592faf..9d78afca4de 100644
--- a/homeassistant/components/fritzbox/sensor.py
+++ b/homeassistant/components/fritzbox/sensor.py
@@ -121,7 +121,9 @@ class FritzBoxPowerSensor(FritzBoxEntity, SensorEntity):
     @property
     def state(self) -> float | None:
         """Return the state of the sensor."""
-        return self.device.power / 1000  # type: ignore [no-any-return]
+        if power := self.device.power:
+            return power / 1000  # type: ignore [no-any-return]
+        return 0.0
 
 
 class FritzBoxEnergySensor(FritzBoxEntity, SensorEntity):
@@ -130,7 +132,9 @@ class FritzBoxEnergySensor(FritzBoxEntity, SensorEntity):
     @property
     def state(self) -> float | None:
         """Return the state of the sensor."""
-        return (self.device.energy or 0.0) / 1000
+        if energy := self.device.energy:
+            return energy / 1000  # type: ignore [no-any-return]
+        return 0.0
 
     @property
     def last_reset(self) -> datetime:
diff --git a/homeassistant/components/fritzbox/switch.py b/homeassistant/components/fritzbox/switch.py
index 62d1cb1ecf8..133db92feda 100644
--- a/homeassistant/components/fritzbox/switch.py
+++ b/homeassistant/components/fritzbox/switch.py
@@ -56,11 +56,6 @@ async def async_setup_entry(
 class FritzboxSwitch(FritzBoxEntity, SwitchEntity):
     """The switch class for FRITZ!SmartHome switches."""
 
-    @property
-    def available(self) -> bool:
-        """Return if switch is available."""
-        return self.device.present  # type: ignore [no-any-return]
-
     @property
     def is_on(self) -> bool:
         """Return true if the switch is on."""
diff --git a/tests/components/fritzbox/test_binary_sensor.py b/tests/components/fritzbox/test_binary_sensor.py
index f4e32fbe3df..cb76109e0ff 100644
--- a/tests/components/fritzbox/test_binary_sensor.py
+++ b/tests/components/fritzbox/test_binary_sensor.py
@@ -14,8 +14,8 @@ from homeassistant.const import (
     ATTR_UNIT_OF_MEASUREMENT,
     CONF_DEVICES,
     PERCENTAGE,
-    STATE_OFF,
     STATE_ON,
+    STATE_UNAVAILABLE,
 )
 from homeassistant.core import HomeAssistant
 import homeassistant.util.dt as dt_util
@@ -60,7 +60,7 @@ async def test_is_off(hass: HomeAssistant, fritz: Mock):
 
     state = hass.states.get(ENTITY_ID)
     assert state
-    assert state.state == STATE_OFF
+    assert state.state == STATE_UNAVAILABLE
 
 
 async def test_update(hass: HomeAssistant, fritz: Mock):