'Return true if aux heater.'

@property
def is_aux_heat_on(self):

    if ((self.wink.current_hvac_mode() == 'aux') and self.wink.is_on()):
        return True
    elif ((self.wink.current_hvac_mode() == 'aux') and (not self.wink.is_on())):
        return False
    return None
