Since we cruise year around I normally keep the reefers on 24/7. A few years ago upon arriving I noticed that the refrigerator kept start cycling, but would not actually run. I contacted WAECO Adlher Barber the maker for customer support and after talking to them about the symptoms they concluded it was a bad Control Module. It was easy to replace, basically plug and play, after which the unit started up and has been trouble free ever since.