Evaporator fan running constantly

Brand:whirlpool
Model Number:WRS555SIHZ06
Main Symptom:evaporator fan runs continuously
What happens & when:the evaporator fan runs for very long periods of time and shuts down briefly. I have removed the back panel of freezer and coils appear great and are not iced or frozen. Both refrigerator and freezer are cooling with great temperatures.

Error Code (if any):none
Parts or tests already tried:none
Photos / video link:none

Based on the information and description, it sounds like all is working normally.

https://www.appliancepartspros.com/repair-help/refrigerator-repair-help