diff --git a/homeassistant/components/senz/climate.py b/homeassistant/components/senz/climate.py
index c03ca2732dd..d47ae7a4a85 100644
--- a/homeassistant/components/senz/climate.py
+++ b/homeassistant/components/senz/climate.py
@@ -6,7 +6,11 @@ from typing import Any
 from aiosenz import MODE_AUTO, Thermostat
 
 from homeassistant.components.climate import ClimateEntity
-from homeassistant.components.climate.const import ClimateEntityFeature, HVACMode
+from homeassistant.components.climate.const import (
+    ClimateEntityFeature,
+    HVACAction,
+    HVACMode,
+)
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_TEMPERATURE, PRECISION_TENTHS, TEMP_CELSIUS
 from homeassistant.core import HomeAssistant, callback
@@ -85,6 +89,11 @@ class SENZClimate(CoordinatorEntity, ClimateEntity):
             return HVACMode.AUTO
         return HVACMode.HEAT
 
+    @property
+    def hvac_action(self) -> HVACAction:
+        """Return current hvac action."""
+        return HVACAction.HEATING if self._thermostat.is_heating else HVACAction.IDLE
+
     async def async_set_hvac_mode(self, hvac_mode: HVACMode) -> None:
         """Set new target hvac mode."""
         if hvac_mode == HVACMode.AUTO: