Yes and no. HVAC systems tend to leak over time due to the normal wear and tear on a system. Leaks can also occur for other reasons. You should not have to regularly add refrigerant to a system, however. If your system is found to be low on refrigerant, a technician can leak check the system to determine the source of the leak. It may be repairable, or it may signal the need to replace a component of your system.