I am driving to Minnestota from Texas and the AC keeps giving the message "low refrigerant AC off" and throws the B1347 code (which is very low refrigerant). Luckly I know how to reset the code (thanks to this board), it will then run just fine (very cold) for sometimes 30 minutes, other times it will run all day.
I stopped at a cadillac dealership for them to look at it and they said the AC was .5 lbs low and evacuated the system adding a total of 2 lbs (I think). Within a few hours of driving I have the same problem happen all over again. From what I have read in the archives the problem must be low refrigerant, plugged orfice tube or faulty low pressure switch. So through process of elimination I thought I would try the low pressure switch next. I don't have my manuals with me so anyone know where this one is located? Also can I replace this without any refrigerant leaking out or does it need to be evacuated again?
I did get B1315 (Evaporator Inlet temp sensor short circuit) one time but only saw that in the history never current.