diff --git a/homeassistant/components/iaqualink/climate.py b/homeassistant/components/iaqualink/climate.py
index b7dbe43fca9..5a81ad3d681 100644
--- a/homeassistant/components/iaqualink/climate.py
+++ b/homeassistant/components/iaqualink/climate.py
@@ -42,7 +42,12 @@ class HassAqualinkThermostat(AqualinkEntity, ClimateEntity):
     """Representation of a thermostat."""
 
     _attr_hvac_modes = [HVACMode.HEAT, HVACMode.OFF]
-    _attr_supported_features = ClimateEntityFeature.TARGET_TEMPERATURE
+    _attr_supported_features = (
+        ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
+    )
+    _enable_turn_on_off_backwards_compatibility = False
 
     def __init__(self, dev: AqualinkThermostat) -> None:
         """Initialize AquaLink thermostat."""