Return today to do leak search on zone system. Turn system off and let the pressures equalize. Detected a leak with a electronic leak detector in the evaporator coil. Coil is still under parts and labor warranty with Trane. Misty or Holly to call when evaporator coil comes in. Still waiting on Low pressure cut out switch for outdoor unit. System is cooling properly at this time. Advise client there is a $150 warranty processing fee once the coil comes in.