The system was not cooling for the customer. The customer said the line was freezing up. Blower motor is operating normally, the filter is clean. Checked refrigerant levels and they are good, a high head pressure was present due to a dirty condenser coil. Chemically washed condenser coil. Left the customer with a replacement filter. Found voltage distribution system with electrical pitting. Due to age and condition of the system, recommend upgrading system to a more reliable, more efficient system. The system is cooling at this time.