2 system ac maintenance in Buford. Changed filters. Cleared drain lines. Checked mechanical and electrical components. Found upstairs blower wheel to be very dirty, recommend pull and clean service. Found upstairs blower capacitor(10) to be weak, recommend replacement. Found upstairs thermostat to have a faulty mode selection switch, recommend replacement. Found basement system blower wheel to be dirty, recommend pull and clean service. Found basement system to have a weak blower capacitor(5), recommend replacement. Found both evaporator coils to be dirty, recommend clean in place service. Found mold inside supply on basement system, recommend UV purification system to kill mold, bacteria and viruses. Found burnt and pitted contractor on upstairs condenser, recommend replacement. Due to the age, condition and cost of repairing both systems I recommend upgrading to a new and more efficient setup. Systems are operating at this time.