Lennox Model # XC13-048-230-04 Serial # 5810L10778 Completed a preventative maintenance maintenance on a 12 year old Lennox unit. Changed out customer supplied 16x20x4 filter. The temperature split was 21. The condensate pump and drain line are operating properly. Then I went outside performed a amperage readings on the compressor 8.4 amps and condenser fan motor 1.2 amps. Then I checked contactor and capacitor, the contactor was operating properly the capacitor was very rusted and operating at low readings me and the customer decided it would be better to just replace it now, they also, paid for 1 year of the chud club membership system is operating properly at this point.