diff --git a/custom_components/versatile_thermostat/climate.py b/custom_components/versatile_thermostat/climate.py
index ad1c512..115c05d 100644
--- a/custom_components/versatile_thermostat/climate.py
+++ b/custom_components/versatile_thermostat/climate.py
@@ -2050,7 +2050,10 @@ class VersatileThermostat(ClimateEntity, RestoreEntity):
             now - self._last_ext_temperature_mesure.replace(tzinfo=self._current_tz)
         ).total_seconds() / 60.0
 
-        mode_cond = self._is_over_climate or self._hvac_mode != HVACMode.OFF
+        # TODO before change:
+        # mode_cond = self._is_over_climate or self._hvac_mode != HVACMode.OFF
+        # fixed into this. Why if _is_over_climate we could into security even if HVACMode is OFF ?
+        mode_cond = self._hvac_mode != HVACMode.OFF
 
         temp_cond: bool = (
             delta_temp > self._security_delay_min
diff --git a/custom_components/versatile_thermostat/underlyings.py b/custom_components/versatile_thermostat/underlyings.py
index 87d4ce6..521dcd1 100644
--- a/custom_components/versatile_thermostat/underlyings.py
+++ b/custom_components/versatile_thermostat/underlyings.py
@@ -581,8 +581,41 @@ class UnderlyingClimate(UnderlyingEntity):
         return self._underlying_climate.temperature_unit
 
     @property
-    def target_temperature_step(self) -> str:
+    def target_temperature_step(self) -> float:
         """Get the target_temperature_step"""
         if not self.is_initialized:
             return 1
         return self._underlying_climate.target_temperature_step
+
+    @property
+    def target_temperature_high(self) -> float:
+        """Get the target_temperature_high"""
+        if not self.is_initialized:
+            return 30
+        return self._underlying_climate.target_temperature_high
+
+    @property
+    def target_temperature_low(self) -> float:
+        """Get the target_temperature_low"""
+        if not self.is_initialized:
+            return 15
+        return self._underlying_climate.target_temperature_low
+
+    @property
+    def is_aux_heat(self) -> bool:
+        """Get the is_aux_heat"""
+        if not self.is_initialized:
+            return False
+        return self._underlying_climate.is_aux_heat
+
+    def turn_aux_heat_on(self) -> None:
+        """Turn auxiliary heater on."""
+        if not self.is_initialized:
+            return None
+        return self._underlying_climate.turn_aux_heat_on()
+
+    def turn_aux_heat_off(self) -> None:
+        """Turn auxiliary heater on."""
+        if not self.is_initialized:
+            return None
+        return self._underlying_climate.turn_aux_heat_off()
\ No newline at end of file