Complete 6 system a/c repair and preventative maintenance check. Found master bedroom system has frozen up due to a bad blower motor. Tested other systems. Found bonus room blower capacitor weak (10 uf). Found kids room blower capacitor weak (10 uf). Kids' room suction line is not properly insulated on the area going into the evaporator coil. The bonus room system runs on r22, a refrigerant that has been phased out by the EPA. The bonus room system's main electrical switch has an electrical pitting present. The bonus room system has a weak dual capacitor (50/5uf). The Master bedroom dual capacitor is weak (45/5uf). Turned power on and found blower capacitor sparking and catching fire. Replaced blower capacitor in the dining room unit (7.5uf). The dining room system is low on r22.