Checked all major components: Freon levels compressor , fan motor , capacitor, coils , flushed drain line , checked filters, rinsed condenser coil. Based on reading subcooling is 3F which is low and DT is 13 . The temp in liquid line reaches 101F which means there is a restriction in the line . Also unit doesn’t have a filter dryer . Recommend customer to add filter dryer and blow the line set with nitrogen. Customer agreed to do the repair