Our old Adler Barbour CU-100 was replace with a new one this spring, same make and model. When I place a meat thermometer at the bottom of the box it reads 20 degrees even with the thermostat at its lowest setting so everything freezes up. The installer is going to come back and replace the existing thermostat with one that has a 32 to 50 degree range which should help and keep the cooling unit from recycling so much. We do not keep anything frozen in the frig (although we certainly can the way it is now) and most home frigs recommend about 40 degrees. But then I did remember reading someplace that a boater installed a fan inside the converted ice box.
This morning, while reading posts about this subject on another boating web site, a sailboat owner put together some PVC pipe with one end at the bottom of his box and then extended it up to near the top when a 12 volt computer fan was mounted. This drew cold air from the bottom and blew it up into the top. It ran as long as the refrigerator was turned on since the fan draws very little power. I think this would work very well on my boat since the E32~3 has a plastic shelf covering the bottom of the box. This shelf has oblong holes in it which allowed ice block melt to drain in the “bilge” of the ice box which can be pumped out. I could use this removable shelf as a template to cut a new one with drainage hole, for spillage, and a section aft with a fitting for a PVC pipe.
Following the idea I read about, I’d mount the fan at the top of the pipe and it would draw cold air from the bilge section of the ice box bilge area where the cold air settles. I”d just have to find a good place to drill a hole in the box to reach the 12 volt power wire for the CU-100 or connect it to the same terminals for the fan on the cooling unit.
