What is one reason that A/C systems might freeze up?

Insufficient airflow due to dirty filters is a common cause of freezing in air conditioning systems. When filters are dirty, they restrict the flow of air through the system. This lack of airflow prevents the evaporator coil from absorbing heat effectively. As a result, the temperature of the coil drops, which can lead to the formation of ice on the coil, ultimately causing the entire system to freeze up.

Maintaining clean filters is essential for proper air movement and overall system efficiency. If airflow is compromised, it can lead to other issues, such as compressor damage and reduced cooling performance. Regular maintenance, including cleaning or replacing filters, helps to prevent these conditions from occurring and ensures the system operates efficiently.