A refrigerated merchandiser including a refrigeration system, a first sensor in communication with the refrigerated airflow in a discharge passageway to sense a discharge airflow temperature, and a second sensor is in communication with the refrigerated airflow in the return passageway to sense a return airflow temperature. A controller is in electrical communication with the first sensor and the second sensor and controls a temperature of the product within a predetermined temperature range that is between about 22 degrees Fahrenheit and 23 degrees Fahrenheit based on at least one of the discharge airflow temperature and the return airflow temperature. The controller is further programmed to operate the refrigeration system such that the discharge airflow temperature is maintained above a temperature between about 10 degrees Fahrenheit and 30 degrees Fahrenheit to regulate an evaporation temperature of the evaporator to avoid freezing the product.