When a residential refrigerator compressor clicks occasionally or rhythmically every few minutes but consistently fails to start running, it indicates that the electrical starting circuit is attempting to engage the motor, but a safety or hardware component is blocking ignition. The primary culprit is a defective compressor start relay or thermal overload switch; when these small electrical components wear out, they cannot provide the initial electrical boost required to turn the compressor motor over, causing the safety switch to trip, click open, and cut power. Other causes include low household voltage or a seized compressor motor. You can troubleshoot electrical power using a multimeter. You can verify that your troubleshooting is successful when replacing a faulty start relay module restores reliable electrical continuity and allows the compressor motor to start up.
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