My Frig is not cooling

your ptc relay on the compressor when they go out they make a clicking noise. The compressor will quit and little bit later might try to come back on and click again. You need a new ptc relay. It is on the compressor little black box just unplug your refrigerator and pull the relay off. undo the wires and get a new one. Kinda staight forward compressor has 3 prongs that the relay plugs into.