refrigerator/freezer stopped working

hello every one,my refrigerator and freezer stopped working,i hear a click about every five to ten minutes like when the thermostat kicks in but no ice in the freezer and it is not cooling the fridge.i am not an expert but i am going to try fix it myself .I need your help please.
It is a kenmore elite model#596.75522400 what could be the problem? If it’s the thermostat could you tell me where to find it? thank you:(