Refrigerator Not CoolingA refrigerator that runs but fails to cool is often suffering from simple issues you can fix yourself. The most common causes are dirty condenser coils, a thermostat accidentally bumped off its setting, blocked air vents or poor door seals. These problems restrict airflow or heat transfer and are easy to check. Begin by setting the temperature control to the recommended 37°F for the refrigerator and 0°F for the freezer and give the appliance 24 hours to stabilize. Then make sure the condenser coils are clean and there’s good clearance behind the unit for ventilation. Check that food isn’t blocking the vents between the freezer and fridge compartments and that the door gaskets form a tight seal. If these steps don’t restore cooling within a day, a failed fan, defrost system, or compressor may be to blame and requires a professional inspection.