Came out to perform preventative maintenance on AC system. Customer met me at front door and began to show me to all parts of the system. We discussed maintenance being provided today and any issues they may be having. Customer hasn’t had any problems, but did bring up that the last tech stated a wire would need to be replaced on the AC visit. Told her I would look into and get it replaced. Pulled electronic air cleaner and cleaned pre filters with water and used nitrogen on the electrical cells. Inspected the blower assembly, motor, capacitor, electrical components, evaporator coil, drain and overall condition of system. We were out earlier this year and did a good mount of cleaning of the interior unit and also replaced the blower motor. I washed the condenser coil thoroughly. Inspected the compressor, fan motor, capacitor, contactor, electrical wiring, and system disconnect. Found a burned wire from the contactor to common on the capacitor. I replaced the wire and continued my check