Yes, if your residential refrigerator begins emitting an unusually loud, harsh, or aggressive humming noise accompanied by a failure to cool or repetitive electrical clicking, you should unplug the power cord from the wall outlet immediately to prevent motor burnout, ruined electrical windings, or a potential fire hazard. While a normal compressor makes a gentle low-frequency hum during routine cooling cycles, an abnormally loud or buzzing hum often indicates that the compressor motor is locked, the start relay is shorting out, or a fan motor bearing has seized completely. You can troubleshoot safely while unpowered by inspecting fans and relay modules. You can verify that it is safe to restore power when clearing obstructions or replacing faulty electrical components eliminates the loud humming noise completely.
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