System not on upon arrival. Turned it on to test operation. Fan would run, compressor would not. Diagnosed a failed motor booster. Replaced failed part with new, also installed new motor starter and start assist. Installed drain pan treatment to prevent biological growth in drain pan, pad is good for one year. Also brought AC up to current code of locking caps. AC precision tune up. Clean and tune up AC; cleaned condenser coil, checked all outdoor electrical components, tested indoor air flow, checked refrigerant levels, and tested overall AC operation.