diff --git a/homeassistant/components/light/tradfri.py b/homeassistant/components/light/tradfri.py
index a26a2eb828a..50e92f15e3c 100644
--- a/homeassistant/components/light/tradfri.py
+++ b/homeassistant/components/light/tradfri.py
@@ -339,6 +339,8 @@ class TradfriLight(Light):
         # pylint: disable=import-error
         from pytradfri.error import PytradfriError
         if exc:
+            self._available = False
+            self.async_schedule_update_ha_state()
             _LOGGER.warning("Observation failed for %s", self._name,
                             exc_info=exc)
 
diff --git a/homeassistant/components/switch/tradfri.py b/homeassistant/components/switch/tradfri.py
index 74997332b07..b247858b062 100644
--- a/homeassistant/components/switch/tradfri.py
+++ b/homeassistant/components/switch/tradfri.py
@@ -108,6 +108,8 @@ class TradfriSwitch(SwitchDevice):
         """Start observation of switch."""
         from pytradfri.error import PytradfriError
         if exc:
+            self._available = False
+            self.async_schedule_update_ha_state()
             _LOGGER.warning("Observation failed for %s", self._name,
                             exc_info=exc)