My refrigerator works for two days and stops for two.

My refrigerator works for two days and stops for two. Hi, My GE side by side works for one and two days and stops, the lights stills on, but the compressor does not start, it spend some time trying to start but just don´t happen, and after one or two days off, it just turn on again. I have changed the thermostat and the main board is good too.