diff --git a/homeassistant/components/geniushub/climate.py b/homeassistant/components/geniushub/climate.py
index 5acc25a36ee..9a19edd9f8b 100644
--- a/homeassistant/components/geniushub/climate.py
+++ b/homeassistant/components/geniushub/climate.py
@@ -3,6 +3,9 @@ from typing import List, Optional
 
 from homeassistant.components.climate import ClimateDevice
 from homeassistant.components.climate.const import (
+    CURRENT_HVAC_HEAT,
+    CURRENT_HVAC_IDLE,
+    CURRENT_HVAC_OFF,
     HVAC_MODE_HEAT,
     HVAC_MODE_OFF,
     PRESET_ACTIVITY,
@@ -68,6 +71,17 @@ class GeniusClimateZone(GeniusZone, ClimateDevice):
         """Return the list of available hvac operation modes."""
         return list(HA_HVAC_TO_GH)
 
+    @property
+    def hvac_action(self) -> Optional[str]:
+        """Return the current running hvac operation if supported."""
+        if "_state" in self._zone.data:  # only for v3 API
+            if not self._zone.data["_state"].get("bIsActive"):
+                return CURRENT_HVAC_OFF
+            if self._zone.data["_state"].get("bOutRequestHeat"):
+                return CURRENT_HVAC_HEAT
+            return CURRENT_HVAC_IDLE
+        return None
+
     @property
     def preset_mode(self) -> Optional[str]:
         """Return the current preset mode, e.g., home, away, temp."""