SERVICE REPAIRED: The 3 1/2 Ton AC system Trane 6 Years old was not working properly due to poor maintenance condition. service Performend, Clean Condens Coil with Chemical plus Add one Pound of refrigerant R 410a, Test Cooling mode, check refrigerant charge the pressures are 125/305 psi with 8 degrees Subcooling. After final inspection system is working properly. I recommend to service the system at least 2 times a year to keep the system at the Highest efficiency possible and extend the life of the Equipment.