A very small refrigerant leak over a period of time, could cause the system to drop below the threshold, where the pressure switch senses low refrigerant and the compressor will not cycle. The compressor seals require refrigerant & oil circulation in order to maintain flexibility. If they sit too long without oil circulation, the seals can become dry and leaks can start. What system do you have, ACC or standard? If you have the ACC system, the 1993 model display, will give a fault code for low Freon. When you first turn on the ignition switch, the temperature display will flash for two minutes, indicating a fault code in present.
