r22 2 ton goodman no txv. outside air temp 90.31 deg. split temp air intake and best register.low side 67, high side 218. superheat 18 subcooling 1.3. tech came out said system has noncondensables. want to recover *****,clean evap coils and pull vacuum. recharge. r22 is very expensive, could he just pump down,clean coils, vacuum and recharge?