Customer stated they found ice at outdoor unit. I turned on system and checked operation. Freon level is good. Customer had replaced very dirty air filter. Dirty filter had caused iced up system. New filter that is in system now is restricting airflow. TXV system is running at 19 degrees superheat. condenser coil: dirty. Compressor: 9.6A .Condenser fan: .85A. Blower: .ambient: 80 .liquid line: 95.suction line: 59 .metering device: TXV . Suction pressure: 118(40) .head pressure: 312(98.5). Return air: 75.5 .supply air: 54 .wet bulb: 63 .