If the evaporator coils are frosted over, test each component of the defrost system. The evaporator fan motor draws cold air over the evaporator coils and circulates it throughout the freezer. If the evaporator fan is not working, the freezer or refrigerator will not cool adequately.
If the refrigerator is running, but not cooling at all or is not cold enough, several. .. Make sure refrigerator and freezer doors can close and can properly seal.
It is hard to say based on the lack of information provided, what type of fridge we are talking about.. Why is my GE Profile refrigerator's freezer not cooling?
Here are some refrigerator troubleshooting tips to help you zero in on the problem if you notice your fridge not cooling. If you can hear the compressor running .