The customer's unit would not cool less than 75*.I ran into a 14 SEER goodman with a clogged drain line frozen coil, and ice at the TXV. I cleared the line, defrosted the coil, and cleaned the condenser coil only to find a high Condenser pressure and low suction pressure. It was about 85 degrees out. I got 330PSIG (105*) and 110PSIG(37*) I found the super heat and subcool very high because both lines where at around 75. I managed to get the indoor temp drop to 17* but I did not want to add R410 for fear of jacking up the pressure to high. I thought the TXV or bad air flow could be responsible for these pressures I am still brainstorming on what actually was going on.