Tune up full system inspection Tested float switch. Flushed drain line with 1 gallon of water. Blower wheel and evaporator coil have light dust. Checked all wiring, added to wire nut to exposed red/white wires on top of air handler. Took compressor amp draw, checked capacitor microfarads. Condenser coil is clear. Checked refrigerant, pressures and temperatures. Took delta T Temperature split at return grill, and supply register. The system is running well at this time.