I need some assistance troubleshooting. After I have replaced both the TPC relay and the overload relay, the refrigerator did power up and the compressor started, it cooled very well for about 24-30 hours then shut down again. I have unplugged and let stand overnight then re-plugged, but the compressor will NOT start up again. The digital display inside does power up and display the current temp inside and the correct pre-set temp of 45 degree temp but compressor will not start. Any suggestions??