chocolate display cases in Pastry & Baking Posted January 4, 2010 The humidity problem is related to the "power" of the coils the fridge/freezer as well as ventilation. Since Edward's cases were made for display and have worked well previously just adding a new temperature controller wouldn't be a problem, the compressor is doing the same work no matter which thermostat is turning it on and off. What typically happens in a fridge or freezer pressed into less-cold service is that the refrigerant coils in the walls get very cold compared to the rest of the storage area whenever they are turned on. This brings the walls by the coils below the dew point of the air and causes condensation. In my beverage fridge they use coils mounted inside the case rather than in the walls like my regular fridge and freezers. The system turns on a fan to blow air across the coils whenever the compressor is on. This helps keep the temperature differential between the coils and the air minimized and therefore reduces condensation problems. On my freezer I typically just wipe down the interior walls a couple times a day if I'm using it heavily.