Performed AC repair to restore optimal cooling performance. Diagnosed the issue using a digital multimeter to check electrical components and refrigerant levels with a manifold gauge set. Identified a faulty capacitor and low refrigerant. Replaced the capacitor with a new one and recharged the system with R-410A refrigerant. Tested the system for leaks and verified proper operation. Ensured the air handler and condenser unit were clean and functioning efficiently.