Customer has 12 y/o 2-zone Goodman system that operates for whole house. Zoning has been disconnect due to single system install with no bypass damper to prevent high limit fault. Ductwork is not properly sized for system. Filter was very dirty. Blower wheel was very dirty. Water protection is poor. Drain line improperly pitched. Evaporator coil is dirty. Run capacitor is bad. Condenser coils are dirty. Recommend Apco Ultra for air purification. Informed customer of all findings. Based on our findings today, it might be time to think about getting a brand new system.