[jeff5may]

My guess is that you changed the configuration. The combination of airflow changes through the heat exchangers and the raised evaporator temperature is causing superheated gas to not provide enough cooling to the compressor.

I just came across a fridge unit almost just like yours. Someone dropped it by cuz it don't do sumthin. I have ti troubleshoot it anyway, and I desperately need a large dehydration unit yesterday. I'll do what I do to it, and try to make it much like yours. Stay tuned...