Discovering that your residential refrigerator has randomly grown warm without an obvious cause is frequently triggered by a sudden power surge, a tripped thermal overload relay, a frosted-over evaporator coil blocking airflow, or a condenser coil choked with dust that forced a thermal shutdown. When dust insulates the coils, the compressor overheats and trips its internal safety switch, stopping cooling until it cools down. Another cause is a door left slightly ajar overnight. You can troubleshoot by checking condenser coils and listening for fans. You can verify that the random warming issue is resolved when cleaning dust off the coils, performing a hard electrical reset by unplugging the unit for ten minutes, and ensuring proper door closure allows the refrigeration cycle to resume normal cooling.
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