When a residential refrigerator's motor and fans run continuously but the interior fails to stay cold, several mechanical and environmental issues are typically at fault. First, thick dust and pet hair buildup on the exterior condenser coils beneath or behind the fridge can insulate the coils, preventing heat dissipation. Second, frosted-over evaporator coils hidden behind the freezer panel can block airflow. Third, a low refrigerant charge caused by a sealed system leak will cripple cooling capacity. Fourth, worn-out rubber door gaskets can let warm air seep inside. You can troubleshoot by inspecting condenser coils and door seals. You can verify that your troubleshooting is successful when cleaning coils, defrosting iced coils, or repairing refrigerant leaks restores normal, cold storage temperatures.
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