We recently repaired an AC unit with frozen coils. The issue was due to restricted airflow from a clogged filter and low refrigerant levels. We replaced the dirty filter with a new 16x25x1 pleated filter and recharged the system with R-410A refrigerant. Additionally, we cleaned the evaporator coils to ensure proper airflow. The unit was tested to confirm it was cooling efficiently. Regular maintenance prevents such issues and ensures optimal performance.