diff --git a/homeassistant/components/venstar/climate.py b/homeassistant/components/venstar/climate.py
index e75ee2387ee68922fb435453e1b15b3edac25234..7e1ae1ecd60b09457c0c9932bc94f5e2667a35d9 100644
--- a/homeassistant/components/venstar/climate.py
+++ b/homeassistant/components/venstar/climate.py
@@ -265,9 +265,11 @@ class VenstarThermostat(ClimateDevice):
             elif operation_mode == self._client.MODE_AUTO:
                 success = self._client.set_setpoints(temp_low, temp_high)
             else:
+                success = False
                 _LOGGER.error(
                     "The thermostat is currently not in a mode "
-                    "that supports target temperature"
+                    "that supports target temperature: %s",
+                    operation_mode,
                 )
 
             if not success: