I spoke with homeowner when I arrived. He mentioned that his roommate said the house was getting warmer during the day and since he is heading out for deployment, wanted to get the AC system checked over. I found a 2021 5 ton Trane 2 stage straight cool system installed at the home. The system is currently running low on R-410A charge. System was operating at a 25°SH and 2°SC, with a 72° suction line temperature. I used my electronic leak detector and inspected the indoor evaporator coil in the attic but did not find any refrigerant leaks present during today’s visit. I went over my findings with the homeowner and they chose to move forward with needed repairs. I installed a new outdoor run capacitor at the outdoor unit. I added in 3# of R-410A refrigerant into system, which allowed for a 15°SH and a 10°SC value to be reached, matching the manufacturer specifications for operation. I function tested the system. Everything is working at this time.