diff --git a/pyit600/const.py b/pyit600/const.py
index 2bb5d05..acb0a4a 100644
--- a/pyit600/const.py
+++ b/pyit600/const.py
@@ -28,9 +28,9 @@
 # HVAC states
 CURRENT_HVAC_OFF = "off"
 CURRENT_HVAC_HEAT = "heating"
-CURRENT_HVAC_HEAT_IDLE = "heating (idling)"
+CURRENT_HVAC_HEAT_IDLE = "idle"
 CURRENT_HVAC_COOL = "cooling"
-CURRENT_HVAC_COOL_IDLE = "cooling (idling)"
+CURRENT_HVAC_COOL_IDLE = "idle"
 CURRENT_HVAC_IDLE = "idle"
 
 # Supported presets
diff --git a/pyit600/gateway.py b/pyit600/gateway.py
index e034931..eafd35a 100644
--- a/pyit600/gateway.py
+++ b/pyit600/gateway.py
@@ -532,9 +532,9 @@ async def _refresh_climate_devices(self, devices: List[Any], send_callback=False
                             target_temperature=(ther["HeatingSetpoint_x100"] / 100) if is_heating else (ther["CoolingSetpoint_x100"] / 100),
                             max_temp=(ther.get("MaxHeatSetpoint_x100", 4000) / 100) if is_heating else (ther.get("MaxCoolSetpoint_x100", 4000) / 100),
                             min_temp=(ther.get("MinHeatSetpoint_x100", 500) / 100) if is_heating else (ther.get("MinCoolSetpoint_x100", 500) / 100),
-                            hvac_mode=HVAC_MODE_HEAT if ther["SystemMode"] == 4 else HVAC_MODE_COOL if ther["SystemMode"] == 3 else HVAC_MODE_AUTO,
-                            hvac_action=CURRENT_HVAC_OFF if scomm["HoldType"] == 7 else CURRENT_HVAC_IDLE if ther["RunningState"] == 0 else CURRENT_HVAC_HEAT if is_heating and ther["RunningState"] == 33 else CURRENT_HVAC_HEAT_IDLE if is_heating else CURRENT_HVAC_COOL if ther["RunningState"] == 66 else CURRENT_HVAC_COOL_IDLE,
-                            hvac_modes=[HVAC_MODE_HEAT, HVAC_MODE_COOL, HVAC_MODE_AUTO],
+                            hvac_mode=HVAC_MODE_OFF if scomm["HoldType"] == 7 else HVAC_MODE_HEAT if ther["SystemMode"] == 4 else HVAC_MODE_COOL if ther["SystemMode"] == 3 else HVAC_MODE_AUTO,
+                            hvac_action=CURRENT_HVAC_OFF if scomm["HoldType"] == 7 else CURRENT_HVAC_HEAT if ther["RunningState"] & 1 else CURRENT_HVAC_COOL if ther["RunningState"] & 2 else CURRENT_HVAC_IDLE,
+                            hvac_modes=[HVAC_MODE_OFF, HVAC_MODE_HEAT, HVAC_MODE_COOL, HVAC_MODE_AUTO],
                             preset_mode=PRESET_OFF if scomm["HoldType"] == 7 else PRESET_PERMANENT_HOLD if scomm["HoldType"] == 2 else PRESET_ECO if scomm["HoldType"] == 10 else PRESET_TEMPORARY_HOLD if scomm["HoldType"] == 1 else PRESET_FOLLOW_SCHEDULE,
                             preset_modes=[PRESET_OFF, PRESET_PERMANENT_HOLD, PRESET_ECO, PRESET_TEMPORARY_HOLD, PRESET_FOLLOW_SCHEDULE],
                             fan_mode=FAN_MODE_OFF if fan_mode == 0 else FAN_MODE_HIGH if fan_mode == 3 else FAN_MODE_MEDIUM if fan_mode == 2 else FAN_MODE_LOW if fan_mode == 1 else FAN_MODE_AUTO, # fan_mode == 5 => FAN_MODE_AUTO
@@ -750,7 +750,7 @@ async def set_climate_device_preset(self, device_id: str, preset: str) -> None:
             _LOGGER.error("Cannot set mode: climate device not found with the specified id: %s", device_id)
             return
 
-        if device.model == 'FC600':
+        if device.model in ('FC600', 'ALTHRSQ800WRF'):
             request_data = { "sComm": { "SetHoldType": 7 if preset == PRESET_OFF else 10 if preset == PRESET_ECO else 2 if preset == PRESET_PERMANENT_HOLD else 1 if preset == PRESET_TEMPORARY_HOLD else 0 } }
         else:
             request_data = { "sIT600TH": { "SetHoldType": 7 if preset == PRESET_OFF else 2 if preset == PRESET_PERMANENT_HOLD else 0 } }
@@ -777,8 +777,8 @@ async def set_climate_device_mode(self, device_id: str, mode: str) -> None:
             _LOGGER.error("Cannot set mode: device not found with the specified id: %s", device_id)
             return
 
-        if device.model == 'FC600':
-            request_data = { "sTherS": { "SetSystemMode": 4 if mode == HVAC_MODE_HEAT else 3 if mode == HVAC_MODE_COOL else HVAC_MODE_AUTO } }
+        if device.model in ('FC600', 'ALTHRSQ800WRF'):
+            request_data = { "sComm": { "SetHoldType": 7 } } if mode == HVAC_MODE_OFF else { "sComm": { "SetHoldType": 2 }, "sTherS": { "SetSystemMode": 4 if mode == HVAC_MODE_HEAT else 3 if mode == HVAC_MODE_COOL else 1 } }
         else:
             request_data = { "sIT600TH": { "SetHoldType": 7 if mode == HVAC_MODE_OFF else 0 } }
 
@@ -852,7 +852,7 @@ async def set_climate_device_temperature(self, device_id: str, setpoint_celsius:
             _LOGGER.error("Cannot set mode: climate device not found with the specified id: %s", device_id)
             return
 
-        if device.model == 'FC600':
+        if device.model in ('FC600', 'ALTHRSQ800WRF'):
           if device.hvac_mode == HVAC_MODE_COOL:
               request_data = { "sTherS": { "SetCoolingSetpoint_x100": int(self.round_to_half(setpoint_celsius) * 100) } }
           else: