2000 Mustang GT w/ 95K miles, My AC stopped working recently, the AC clutch doesnt turn on and the engine RPM is erratic at idle with the AC dial in any position other than Off or Vent. Friend of mine told me to jump the low pressure switch with a paper clip and sure enough this makes the AC Clutch kick on and the air works properly along with smooth engine idle, Also tested the pressure with a gauge and freon level is full. Is it safe to assume under these conditions the low pressure switch itself is bad? If so is it possible to change this switch by myself without having to empty the R134 from the system? I wasnt sure if removing the switch would cause it to empty the freon etc. Thanks!