Arrived on site, changed filter and cleared drain line, checked electrical connections, amp draw, capacitance, cleaned outdoor coil and checked refrigerant pressures. Recommend replacing the supply plenum up in attic because it is too small for coil and moving duct that is coming out of the top of plenum to more evenly distributed air flow. Recommend installing surge protection to each piece of equipment, and a compressor assist kit to each outdoor unit to prolong the life of the compressor. Both systems are operating normally at this time