Upon arrival spoke with customer and started checking indoor unit. Filter is clean, coil is still clean, leak searched again with no hits. Blower amped at 1.1amps. Drain is clear. Went outside, checked pressures and they where at 90/300, found to be low. Leak searched outdoor unit and only leak found was shradder on suction port leaking ever so slightly. Fixed it and added 1lb of 419a. When system was running it was acting like the txv was shutting down then cAme back together. Let system run awhile and system is working good at this time. Explained to customer if the txv fails it would need to be an ordered part. System is working at this time of service. Pressures where 115/325, 12° subcool.