diff --git a/homeassistant/components/airzone/climate.py b/homeassistant/components/airzone/climate.py
index 3c47c333b92..74a564fa2de 100644
--- a/homeassistant/components/airzone/climate.py
+++ b/homeassistant/components/airzone/climate.py
@@ -193,6 +193,8 @@ class AirzoneClimate(AirzoneZoneEntity, ClimateEntity):
 
     async def async_set_hvac_mode(self, hvac_mode: HVACMode) -> None:
         """Set hvac mode."""
+        slave_raise = False
+
         params = {}
         if hvac_mode == HVACMode.OFF:
             params[API_ON] = 0
@@ -202,12 +204,13 @@ class AirzoneClimate(AirzoneZoneEntity, ClimateEntity):
                 if self.get_airzone_value(AZD_MASTER):
                     params[API_MODE] = mode
                 else:
-                    raise HomeAssistantError(
-                        f"Mode can't be changed on slave zone {self.name}"
-                    )
+                    slave_raise = True
             params[API_ON] = 1
         await self._async_update_hvac_params(params)
 
+        if slave_raise:
+            raise HomeAssistantError(f"Mode can't be changed on slave zone {self.name}")
+
     async def async_set_temperature(self, **kwargs: Any) -> None:
         """Set new target temperature."""
         params = {}
diff --git a/tests/components/airzone/test_climate.py b/tests/components/airzone/test_climate.py
index 2c66adcb974..f7cc7806bcb 100644
--- a/tests/components/airzone/test_climate.py
+++ b/tests/components/airzone/test_climate.py
@@ -438,7 +438,7 @@ async def test_airzone_climate_set_hvac_slave_error(hass: HomeAssistant) -> None
         )
 
     state = hass.states.get("climate.dorm_2")
-    assert state.state == HVACMode.OFF
+    assert state.state == HVACMode.HEAT
 
 
 async def test_airzone_climate_set_fan_mode(hass: HomeAssistant) -> None: