diff --git a/homeassistant/components/econet/climate.py b/homeassistant/components/econet/climate.py
index 56a98c8d630..69ca3a827ec 100644
--- a/homeassistant/components/econet/climate.py
+++ b/homeassistant/components/econet/climate.py
@@ -148,11 +148,6 @@ class EcoNetThermostat(EcoNetEntity[Thermostat], ClimateEntity):
         if target_temp_low or target_temp_high:
             self._econet.set_set_point(None, target_temp_high, target_temp_low)
 
-    @property
-    def is_aux_heat(self) -> bool:
-        """Return true if aux heater."""
-        return self._econet.mode == ThermostatOperationMode.EMERGENCY_HEAT
-
     @property
     def hvac_mode(self) -> HVACMode:
         """Return hvac operation ie. heat, cool, mode.