I had the compressor changed,system flushed, resealed, and recharged. The instrument paned readout reads "low refrigerant compressor off". So my a/c wont come on. I jumped a wire onto the compressor clutch and the a/c works fine. I just can't get it to turn on by itself. What could be the problem? I checked the trouble codes and I get code AO12 (low side temperature sensor circuit) and AO47 (low refrigerant). Both of these are shown as current and not history. Could it be a faulty refrigerant pressure sensor that tell the computer the refrigerant is low? Some help please.