Only system, 4 zones, not cooling, due to being almost flat on Freon (410a). Evaporator coil is leaking, system is 6 years old, and possible out of warranty. As of immediately repair, recommend to replace evaporator coil. But, due to the system being working low on Freon, other parts maybe affected, like compressor. The better option would be to replace the AC system, with 10 years warranty and WiFi thermostats. Customer bought the house recently and had another hvac company inspected the system. Set a lead for a free quote , to replace AC only ( possible full system) for jun/18th from 8-11 am, then customer will decide what to do. Also, recommend to sign up for home care maintenance program.