When the electrical power came back on after a storm knocked it out for a day, our refrigerator was not working. The lights were on and the control panel was lit up as normal but the temps were over 45. After cleaning the compressor coils and checking that the fans were operating, I narrowed the probable cause to be from a power surge that hit either the main control board and/or the inverter. I ordered both from SearsPartsDirect on a Sunday night. The first to arrive was the control board on Tuesday (!) but swapping this out did not fix the problem. The inverter then arrived the next day and when this was installed the fridge/freezer was back in business. Fantastic!