Unit was low on refrigerant (410a). Added 2lbs. System began cooling properly again. Mentioned we don’t repair leaks in coils. He said it has been about 5 or 6 years since someone last charged it up. Mentioned if he wanted us to pin point the leak it would be a separate charge but I also saw indoor coil had a dark spot. Told him it could be on evaporator coil unless it was just from the ice melting. No other issues to report.