def METHOD_NAME(self):
    """
    Retrieves the high critical threshold temperature of thermal
    Returns:
        A float number, the high critical threshold temperature of thermal in Celsius
        up to nearest thousandth of one degree Celsius, e.g. 30.125
    """
    try:
        if isinstance(self.__reg_crit_high_thresnold, Reg):
            return float(self.__reg_crit_high_thresnold.decode())
    except Exception as e:
        logger.error(str(e))
    return None