Samsung RF217ACPN - 20 cu. ft. French Door Refrigerator "refrigerator loud fan sound" Questions

...Refrigerator is making a noise that sounds like an old style door bell. It a loud buzz that occurs several times a day. Do you have any ideas? User manual and parts list and diagrams. SAMSUNG ...

...refrigerator fan is running loud. I am trying to figure out which fan it is? When I open the refrigerator door, the fan stops running. After I close the door, the fan resumes running several seconds ...