A:Answer You might hear Clicking when the automatic defrost cycle begins and ends in the ENERGY STAR® Qualified LG - 21.9 Cu. Ft. Side-by-Side Refrigerator - Stainless steel, Model # LSXC22336S. Other common sounds you may hear that are normal to the operation of the refrigerator are a rattling sound that may come from flow of the refrigerant, the water line on the back of the unit or from items stored on the top of or around the refrigerator. A whooshing sound from the Evaporator fan motor while it is circling air through the refrigerator and freezer compartments, gurgling sounds from when the refrigerant is flowing through the cooling system, popping sounds from the contraction and expansion of the inside walls due to changes in temperature, sizzling sounds from water dripping on the defrost heater during a defrost cycle, dripping from water running into the drain pan during the defrost cycle, and pulsating or a high-pitched sound from the compressor while the refrigerator is running...^IFV