Today's refrigerators have new features such as automatic ice makers and automatic defrost. They are also designed to be more energy efficient and operate as economically as possible. With this new design, you may hear sounds which are unfamiliar to you, yet they are quite normal and do not require a service call. Ice Maker Ice cubes will drop out of the automatic ice maker into the ice bucket. The freezer control will click when starting or stopping the compressor.
Timer sounds like an electric clock and snaps in and out of the defrost cycle.
Compressor The new high efficiency compressor runs faster and will have a higher pitch hum or pulsating sound while operating. Defrost Drain Pan Defrost water falls into the drain pan during the defrost cycle. The fan circulates cold air to cool the refrigerator and the freezer compartment and sounds like air rushing or a whirring sound. The flow of refrigerant through the freezer cooling coil sounds like boiling water, moaning or a gurgling noise. Defrost Heating Water dropping on the defrost heater causes a sizzling, hissing or popping sound during the defrost cycle.