Why does my LG refrigerator make a clicking noise?

An LG residential refrigerator making a repetitive clicking or snapping noise is typically experiencing a failure in its compressor starting components, electronic control board relays, or automatic icemaker assembly. The most frequent cause of a rhythmic clicking coming from the lower rear mechanical compartment is a faulty compressor start relay or thermal overload protector trying and failing to engage the compressor motor. Alternatively, if the clicking sound originates from the fresh food compartment, it is frequently caused by the electronic control board relays switching power rapidly or an icemaker water valve cycling unsuccessfully. You can troubleshoot by locating the sound source. You can verify that your corrective action is resolved when replacing a faulty start relay, resetting control boards, or servicing the icemaker successfully eliminates the annoying clicking noise and restores normal operation.