diff --git a/homeassistant/components/maxcube/climate.py b/homeassistant/components/maxcube/climate.py
index 2ef451b04a7..f3d302fc209 100644
--- a/homeassistant/components/maxcube/climate.py
+++ b/homeassistant/components/maxcube/climate.py
@@ -68,8 +68,12 @@ class MaxCubeClimate(ClimateEntity):
 
     _attr_hvac_modes = [HVACMode.OFF, HVACMode.AUTO, HVACMode.HEAT]
     _attr_supported_features = (
-        ClimateEntityFeature.TARGET_TEMPERATURE | ClimateEntityFeature.PRESET_MODE
+        ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.PRESET_MODE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
     )
+    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, handler, device):
         """Initialize MAX! Cube ClimateEntity."""