Pkg clean and tune. Furnace. Cycled system. Checked heat exchanger, ok. Checked, removed and cleaned burners and flame sensor. Both ok. Checked and adjusted gas pressures to maximize efficiency. Checked electrical connections and clamps. Tested levels of CO and XS air in exhaust. Normal levels found. No CO found in airstream. System operating normal at this time.m Ac. Cycled system. Checked and cleaned electrical compartment. Capacitor and compressor tested ok. Used coil cleaner on condenser coil. Hooked up gauges and checked pressures and temps. Found indoor coil temp was 38, subcooling was 9, indoor temp split was 17. Even with lower load conditions inside and outside, system operating normal at this time. Job complete.