Performed heater tune-up on two Carrier straight cooling systems. Checked the electrical, mechanical and performance systems of the units. Cleared, cleaned, flushed and treated the drain lines. I replaced the high voltage wire nuts with Wago wire connectors on both furnaces. Secured the compressor wiring of both outdoor systems and washed both outdoor coils. I did find the starter on the master bedroom outdoor system was pitted at the contacts. The outdoor coil is also deteriorating in some areas which could cause a refrigerant leak in the future. No other major issues were found. Both systems are operational at this time.