Monika's refrigerator seems to be running constantly. The temperature gauge says it is cold, but it never seems to cut off. Refrigerators should be in the 34 to 40 degrees Fahrenheit range and freezers from minus 10 to zero. For maximum efficiency, keep both the freezer and refrigerator full and the coil clean. The coil is usually under the appliance but could be behind it.
Hardware stores sell coil-cleaning brushes or the crevice tool fitted to a vacuum also works well.
The coil does not need to be completely dust free and care should be used not to bend or puncture the coil tubes.