My husband purchased a doohickey (sorry for lack of clarity) at a restaurant supply store that is normally used for walk-in fridges; it ensures the fridge's temperature is kept within a specific range--separate from the thermometer mechanism already in the fridge. Ours keeps the fridge within range of 38-42, which we can view on an external monitor. Usually it was at 41.
We tested it for weeks and I don't think it ever went below 38 and yet there was a small patch of frost the one day so obviously something happened.
We tested it for weeks and I don't think it ever went below 38 and yet there was a small patch of frost the one day so obviously something happened.