We inspected the system, cycled and monitored it. The system is very old from 1983 (37 years old), with very poor efficiency, wear and tear, deteriorated evaporator coil and a little low on refrigerant. The duct system is also old. I highly recommend replacing the system and duct work. The customer would like an estimate and we confirmed for tomorrow, Wednesday 7/8, for 10-12 arrival time.