2012 Trane xl59 3.5 ton r410a cooling system is running in very good condition System and th6000 series thermostat are maintaining the set temperature upon arrival. Evidence of old corrosion on the battery terminals but everything is working good now 16x25x4 Honeywell filter is on schedule with homeowner and in good condition, evaporator coil is sealed in the plenum with s-locks foil tape and is only serviceable with disassembly for breakdown repairs Flush condensate drain from service t inline in the pipe Outdoor unit capacitors within specs and starting relay is functioning good. Refrigerant pressures are within specs Water flush condenser coil and return equipment to normal service Homeowner will reset the -10° test temperature on the thermostat All equipment is clean safe and ready for summer