I have a Cal 25 Hull # 243 and am looking for help on troubleshooting problems with my factory installed refrigerator-icebox. The unit is a Unifridge 4.5 cubic ft. 110v - 12v insulated Icebox refrigeration unit. This is a thermoelectric unit and according to what I have read, it should cool the icebox to 30 to 40 degrees below ambient temperature,however my unit is only cooling the box to about 68 degrees. The fan is running and the heat sink is cool and the icebox was factory installed so I assume the insulation is adequate. Does anyone have a unit of this type that could offer some troubleshooting tips or an alternate refrigeration system?