Customer has 7 y/o 2-zone Lennox system that operates for top 2 floors. System was not working due to blown fuse from top level thermostat not being installed properly. Replace 3 amp fuse. Installed customer supplied thermostat properly. Noticed during inspection that run capacitor is bad. Water protection is poor. Zone control board needs independent transformer. Dampers are operational. Recommend iWave -R Air Ionizer for air purification. Pressure levels were normal. Condenser coil cleaning needed. Condenser electrical components are good. Informed customer of all findings. System is currently working.