Unusual noises from a refrigerator can be indicative of various issues. Common causes include a malfunctioning compressor, faulty fans, a clogged or malfunctioning defrost timer, or worn-out motor bearings. It’s best to have a refrigerator repair technician inspect and diagnose the source of the noise to determine the necessary repairs. When it comes to refrigerator repair and installation, it’s recommended to rely on the expertise of a professional technician to ensure accurate diagnostics, effective repairs, and proper installation for optimal performance and longevity of your refrigerator.