Hello Morry. You need to check and see if the clicking noise is coming from the main control board in the back of the unit. If so, then you will need to replace the main board on the unit. It also controls the temp based on the readings of the thermistors inside the unit. Part number: AP4450225

If the clicking is from t he relay overload, it will not likely be the board. That leads to a bad compressor on the unit if it eventually starts. The start device for this model is no longer available. Part number: AP4684176

We made a call to Lg as the cooling system is still under warranty. First tech that came ordered a whole new cooling system, coil, compressor, cable assemblies and thermister, etc. That arrived yesterday and another tech showed up to install. First thing he did (he heard the clicking sound) was to replace the overload protect thermister assembly on the side of the compressor. Plugged it in and it started up quiet and ran fine. We had moved all our food out to a "spare" refrigerator in the garage so the LG was empty. Left it running all night. Before going to bed we noticed that both the fridge and the freezer had temperatures below the settings made by the tech. I got up at 5:00 this morning and it was off but the temps are below the settings. The fridge, for example was at 30 degrees and the setting was at 37. The freezer has a similar number below the zero setting. Again, there is nothing in either unit. Should we be concerned? Our concern is prompted by the compressor which for some time had that click and we're worried it might fail. Again, the first tech was going to swap out the compressor but the second tech did not.