Refrigerators usually have small sounds associated with their operation, such as a soft humming, light clicking, or sounds of air circulating as it turns on and off to keep the food cool and safe to eat. If there are any sudden, strange sounds, such as loud buzzing, it could mean that an internal part of the refrigerator is stressed out.
Homeowners might also hear a continuous refrigerator clicking noise from the back of their refrigerator. This is usually because the compressor is trying to start but failing to do so. Many times, this noise is related to the start relay, the compressor, or the internal fan.
If the buzzing or clicking noise gets louder or happens more frequently, it can be worthwhile to get that appliance checked. A professional refrigerator repair servicecan determine the problem and restore the appliance to working properly again.