Service diagnostic found that a loose wire from the capacitor to the contactor had burnt up. The capacitor is below value. The air handler and blower wheel are also dirty. Options for repair were presented to the customers, and they chose to have the capacitor replaced and to have the air handler and blower wheel cleaned. I replaced the capacitor and reconnected the capacitor with new wire. I pulled and cleaned the blower wheel. I also cleaned the air handler. I function checked the system and the system is operational.