Customer stated that he had a no cool yesterday. TXV and service valves were frozen. Hooked up gauges and checked pressures and temps. Found coil temp low at 23 degrees. Filter is ok and no obstruction on evaporator coil. Added 1 pound 4 oz of R410-A refrigerant. High side went up, but suction side remained under freezing. Checked indoor coil and found half of the coil was freezing up and the upper half was warm. This indicates that there is a problem with the TXV not opening. Office will follow up with pricing for new TXV. warranty will be checked. Maintenance will be done after cooling issue is resolved. No payment collected at this time. System not cooling correctly at this time. Job complete.