ActronAir Fan Guard suits CRS10AS, CRS20AT, CRS23AT is the genuine replacement fan guard for CRS Series wall split indoor units, providing the protective grille that prevents contact with the indoor fan assembly and maintains the correct airflow direction through the indoor coil. A damaged or missing fan guard reduces airflow restriction management and creates a safety hazard from contact with the rotating fan -- replace immediately if the guard is cracked, deformed, or missing. Ensure power is isolated before removing or replacing the indoor fan guard.