diff --git a/homeassistant/components/stiebel_eltron/climate.py b/homeassistant/components/stiebel_eltron/climate.py
index 88cce6c52d7..cedd1b3dd90 100644
--- a/homeassistant/components/stiebel_eltron/climate.py
+++ b/homeassistant/components/stiebel_eltron/climate.py
@@ -73,9 +73,13 @@ class StiebelEltron(ClimateEntity):
 
     _attr_hvac_modes = SUPPORT_HVAC
     _attr_supported_features = (
-        ClimateEntityFeature.TARGET_TEMPERATURE | ClimateEntityFeature.PRESET_MODE
+        ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.PRESET_MODE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
     )
     _attr_temperature_unit = UnitOfTemperature.CELSIUS
+    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, name, ste_data):
         """Initialize the unit."""