If your AC unit is leaking, it is generally recommended to turn it off and address the issue promptly. Continuing to operate a leaking AC can lead to further damage and potentially result in more expensive repairs. It is important to identify the source of the leak and determine whether it is internal or external. Internal leaks, such as a blocked or damaged drain line, can lead to water damage, mold growth, and other issues. On the other hand, an external leak may be caused by refrigerant leakage, which requires professional attention to fix. In either case, turning off the AC and contacting a professional HVAC technician is advisable to assess and resolve the problem.