Complete 1 system a/c repair and preventative maintenance check. Found disconnect at the box at the outdoor unit. Burned and not working. Relaced box. The system is 15 years old has slight dust build-up on the blower wheel. Changed filter cleared drain line. The system has no backup water safety device. The run capacitor is a little weak. The outdoor unit has good pressures and good electrical components. Has no compressor saver or surge protection.