Ac repair in cumming. Discovered drain line clogged and filling up emergency pan. Cleared drain line and removed water from pan. Tested system out. Discovered system slightly low on charge which only happens from a leak. Discovered control wires to outdoor unit bare and exposed to the elements. Main electrical switch is extremely burnt. Pipe insulation is missing outside. Organic growth developing on unit. System is 15 years old and replacement over repair is highly recommended as typical life span is 10-15 years. System cooling at this time.