Performed routine maintenance inspection on 20 y/o Amana system that operates for whole house. Furnace located in attic. System has failed compressor preventing system from cooling properly. Condenser coils are damaged. Condenser fan motor has overheated. Contactor is pitted. Evaporator coil is rusted. Blower wheel is dirty. Ignitor is bad. Inducer motor has overheated. Informed customer of all findings. Based on our findings today, it might be time to think about getting a brand new system.