Why does the air conditioner freeze up?

The air conditioner can freeze up due to low refrigerant levels, restricted airflow, or a malfunctioning thermostat. When the refrigerant levels are low, the coils can get too cold and freeze. Restricted airflow can prevent proper heat exchange, leading to ice buildup. A faulty thermostat may cause the system to run continuously, causing the coils to freeze. Regular maintenance and proper airflow can help prevent the air conditioner from freezing up.