I am working on a 1994 Nissan sentra where the AC is behaving erratically. After having a repair shop top off refrigerant (said it was a little low) it is still doing the same thing. Sometimes it works for weeks on end, then other times it doesn't. It may even go through spells where it will cut on/off and just blow hot air, then 5 min later is working great. All this leads me to think either the pressure switch is bad or there could be a short in the wiring related to the pressure switch.... Back to my original question. On some cars you can remove the pressure switch without discharging the AC. Is this also true on the sentra?
-Inet