When a residential refrigerator compressor successfully kicks on and runs continuously but the interior compartments fail to get cold, the malfunction is almost always caused by a sealed system failure or an internal airflow restriction rather than a broken compressor motor. Common culprits include a refrigerant leak that leaves the system with insufficient gas to absorb heat, frosted-over evaporator coils hidden behind the freezer back panel due to a broken defrost heater, or a failed evaporator fan motor that cannot circulate chilled air into the fresh food section. You can troubleshoot by listening for the evaporator fan and checking freezer frost. You can verify that your troubleshooting is successful when repairing refrigerant leaks, defrosting iced coils, or replacing fan motors restores cold storage temperatures.
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