I arrived for a previous customer reevaluation after they had a electrician come out and get proper power to the condenser. I spoke with the homeowner and found that the thermostat was changing the temperature at random times and they have to keep resetting it. I inspected the system and found the thermostat to have a factory program and this was the cause of the system changing the temperature to a different setting. Once I programmed the thermostat to the homeowners preference I inspected the condenser. I found the system to be running but it was running low on refrigerant. I made this aware to the homeowner and explained that the system is low and I have options on preforming a leak search or just adding refrigerant. We decided to add what refrigerant is needed to get the system running properly. I added 1 pound 12 OZ of R22 to the system.