AC performance tuneup times two systems. Filters are good at this time. Treat drain lines and flush with hot water. Inspect blowers, evaporators and ductwork. Check thermostats for proper operations. Check outdoor units. Refrigerant levels are good at this time. The system is R 22 the old refrigerant. Check capacitors and contactors. Given the age of the systems. There are 2006 models. Recommendation today is to change the larger unit.â€