Tech Cody arrived to customer's home. The system was running but not cooling when I arrived, it is a 26 year old gas system. My guages showed that the system was critically low on refrigerant, I performed a leak search on the outdoor unit, and a partial leak search on the indoor unit, I couldn't get to the back of the coil and I couldn't leak search the part of the lineset that ran underground. I shared my findings with Rick and advised him to talk with a CA about replacing the system. We booked a CA appointment for Tuesday 28th from 12-3.