Manufacturer Lennox Model # XC14-036-230-07 Serial # 5814D11211 Completed a preventative maintenance on a 10 year old Lennox system. When I arrived I changed 16x25x1 filter. Made sure the drain was working and the condensate pump. The split temperature was 10 degrees. I charged the unit with 2 pounds of r -410 A refrigerant the split temperature is 19 and the subcool is at 7 the refrigerant levels are correct. Then I performed a amperage readings on compressor 6.6 amps and the condenser fan motor .8 amps. The capacitor and contactor are both operating properly at this time. System is operating properly, and ready for summer!!