Your forum has answered my questions concerning the Adler Barbour factory installed system on our 1996 Beneteau 321. Your responses indicate that I need a charge in our unit and that the lid gasket needs to be improved.Since the unit is of 1996 vintage, will I be faced with converting to more friendly refrigerant? Is this something that can done by yours truly? "Out of pure curiosity" How come that we do not see propane refrigeration on cruising boats? Is it a function of fuel consumption/storage?....or are there safety issues. I still remember the old Servel gas refrigerator at my parent's house in the fifties, silently performing without a hitch for some ten years.