AC performance tune up times two systems. Verified both drains are clear at this time filters have been changed. Inspect blower, evaporators and ductwork. Downstairs system is 425 lb low of R22. Advise client that if we added refrigerant it would not stay. Suggested replacement. Check outdoor units. Could not find Leak with my sniffer at this time. Upstairs unit is pulling 13 amps for a 3 ton unit. Both systems are 17 years old. Check capacitors and contactors. Both contractors are pitted but working. Upstairs is cooling the house at this time. Jairo to come give quote later today.