Commercial Air Conditioning Repair Service for a customer in Prosper. Upon arrival found system that covers the right side of the office not cooling. The customer had the system off, turned the system on, and checked the indoor unit. Found everything operational, recommend replacing filters within the next few weeks. Checked the outdoor unit and found it slightly low on refrigerant and a contactor wore out. Refrigerant system is a sealed system and shouldn’t be losing refrigerant. Refrigerant does have the potential to Lea back out. The customer opted to add refrigerant and replace the contactor. Added 2lbs of 410-a to set charge, and replaced contactor. The system is now operating properly.