Here is a bit of refrigeration trivia gathered from my own interest in the subject and a penchant for collecting and reading old engineering books, so from the early days of shipping food , in refrigerated cargo ships, determining the ideal cooling temperature for each food type, was one thing, but another, facinating component, is that most food is exothermic, and this property is called "the heat of evolution", and varys with each food type, and is large enough that 50 tons of food will produce enough heat as it ripens to overwhelm an insuficient cooling system, so they had charts detailing the heat output of all the shipped foods, and recomendations on the design of the cooling plants, with some so specialised as to work with one food only....banana boats.... Got a 70 year old "admiral" fridge, the wiring insulation just crumbled, and it will get a new thermostat(hidden) and wire, everything else is in battered original, working condition