Me, too ...
I can't tell you how happy I am to hear of your problem ... I'd begun to think I was alone with this.I have a 2002 H-356, and have experienced the same problem with the spill-over fan ever since the boat was new. The symptom sounds identical to yours: The spill-over fan comes on when the system is first fired up, runs for awhile, then shuts off and never comes on again. So, the temperature in the refrigerator side initially cools down to the safe range, but once the fan stops functioning the temp rises and never comes down below about 50 degrees. The freezer section is running fine ... compressor comes on and off, and temp stays at about 20 degrees with the thermostat set on 5 (7 is max). The dealer has made numerous unsuccessful attempts to find the trouble, and finally commissioned a marine refrigeration expert with no greater luck. The last "fix" was to replace the spill-over fan thermostat and relocate it to a different mounting position, on the theory it was falsely reading the temp on the coldest wall that is shared with the freezer section. Well, that has made no difference either. After an initial run period, the spill-over fan still stops and never restarts ... regardless of its thermostat setting or the temperature in the refrigerator.There must be a simple solution, so any advice is deeply appreciated!PeteS/V "Sh'boom!"