diff --git a/homeassistant/components/climate/maxcube.py b/homeassistant/components/climate/maxcube.py
index 9d6c1bbab5bec..271616daf8b04 100644
--- a/homeassistant/components/climate/maxcube.py
+++ b/homeassistant/components/climate/maxcube.py
@@ -10,7 +10,6 @@
 from homeassistant.components.climate import ClimateDevice, STATE_AUTO
 from homeassistant.components.maxcube import MAXCUBE_HANDLE
 from homeassistant.const import TEMP_CELSIUS, ATTR_TEMPERATURE
-from homeassistant.const import STATE_UNKNOWN
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -140,7 +139,7 @@ def update(self):
     def map_temperature_max_hass(temperature):
         """Map Temperature from MAX! to HASS."""
         if temperature is None:
-            return STATE_UNKNOWN
+            return 0.0
 
         return temperature