Customer has 11 y/o AireFlo system that operates for upper level. System has water leak due to clogged drain line. Drain line is not properly pitched. Filter was very dirty. Replaced 16x25x1 filter. Water protection is poor. Blower motor is bad. Run capacitor is bad. Low pressure levels were low indicating loss of refrigerant. Bad evaporator coil. Condenser coils are dirty. Informed customer of all findings. Based on our findings today, it might be time to think about getting a brand new system.