Understanding your walk in freezer will save you money and frustration. Many refrigeration problems are caused by not understanding the operation of commercial refrigeration equipment. The basic cycle of cooling and warming is the same as with a walk in cooler . The walk in freezer in this example comes on at 0 degrees Farenheit and runs until the box pulls down to -5 degrees.
Then the condensing unit turns off. The air in walk-in warms from door opening, heat gain through the walls and the product. When the temperature reaches 0 degrees, the condensing unit comes on again to repeat the cycle.