diff --git a/homeassistant/components/ecobee/binary_sensor.py b/homeassistant/components/ecobee/binary_sensor.py
index 0d3174cb5a6..b81a5e6bef6 100644
--- a/homeassistant/components/ecobee/binary_sensor.py
+++ b/homeassistant/components/ecobee/binary_sensor.py
@@ -80,6 +80,12 @@ class EcobeeBinarySensor(BinarySensorEntity):
             }
         return None
 
+    @property
+    def available(self):
+        """Return true if device is available."""
+        thermostat = self.data.ecobee.get_thermostat(self.index)
+        return thermostat["runtime"]["connected"]
+
     @property
     def is_on(self):
         """Return the status of the sensor."""
diff --git a/homeassistant/components/ecobee/humidifier.py b/homeassistant/components/ecobee/humidifier.py
index fadaa83155a..984609c2f22 100644
--- a/homeassistant/components/ecobee/humidifier.py
+++ b/homeassistant/components/ecobee/humidifier.py
@@ -69,6 +69,11 @@ class EcobeeHumidifier(HumidifierEntity):
             "model": model,
         }
 
+    @property
+    def available(self):
+        """Return if device is available."""
+        return self.thermostat["runtime"]["connected"]
+
     async def async_update(self):
         """Get the latest state from the thermostat."""
         if self.update_without_throttle:
diff --git a/homeassistant/components/ecobee/sensor.py b/homeassistant/components/ecobee/sensor.py
index 7cf04e12718..275db46ab0a 100644
--- a/homeassistant/components/ecobee/sensor.py
+++ b/homeassistant/components/ecobee/sensor.py
@@ -92,6 +92,12 @@ class EcobeeSensor(SensorEntity):
             }
         return None
 
+    @property
+    def available(self):
+        """Return true if device is available."""
+        thermostat = self.data.ecobee.get_thermostat(self.index)
+        return thermostat["runtime"]["connected"]
+
     @property
     def device_class(self):
         """Return the device class of the sensor."""
diff --git a/tests/components/ecobee/test_climate.py b/tests/components/ecobee/test_climate.py
index cc394a1f63f..ec466197995 100644
--- a/tests/components/ecobee/test_climate.py
+++ b/tests/components/ecobee/test_climate.py
@@ -22,6 +22,7 @@ def ecobee_fixture():
             "currentClimateRef": "c1",
         },
         "runtime": {
+            "connected": True,
             "actualTemperature": 300,
             "actualHumidity": 15,
             "desiredHeat": 400,
diff --git a/tests/fixtures/ecobee/ecobee-data.json b/tests/fixtures/ecobee/ecobee-data.json
index 6e679616085..a4caa72798d 100644
--- a/tests/fixtures/ecobee/ecobee-data.json
+++ b/tests/fixtures/ecobee/ecobee-data.json
@@ -12,7 +12,7 @@
                 "currentClimateRef": "c1"
             },
             "runtime": {
-                "connected": false,
+                "connected": true,
                 "actualTemperature": 300,
                 "actualHumidity": 15,
                 "desiredHeat": 400,