Carrier M# 24ACC448A300 - S# 1620E19293 Completed a preventative maintenance on a three year old air conditioner. Tested the condensate pump and tested the drain from the evaporator coil. The split temperature is 21. Performed a amperage reading on condenser fan motor and blower motor, all are operating properly. Changed out the 16x25x4 customer supplied filter. Capacitor is operating properly. System is operating properly at this time.