Why is your window ac unit freezing up?

A window AC unit may freeze up due to several reasons, including low refrigerant levels, dirty air filters, or obstructions in airflow. When the airflow is restricted, the evaporator coil can become too cold, leading to frost accumulation. Additionally, high humidity levels can cause moisture to freeze on the coils. Regular maintenance, such as cleaning filters and ensuring proper refrigerant levels, can help prevent this issue.