I have a 1991 model Forma model# 3662 4*c reach in. Compressor is dead. Compressor no longer available. I can get around that. Checked evap coil and found refrigerant leak on aluminum tubing and would'nt you know it, my aluminum brazing skills are no where to be found. Who would attempt the repair of an aluminum coil. My past experiences have not been good. I usually make it worse.