Fresh food side warm. Fresh food fan not running.

It appears this is a Samsung built unit. From the parts diagram I believe the fresh food evap fan is p# DA97-01150A. This is a 2 wire 12 VDC motor. On a lot of models the door switch has to be closed for the fan to work. So check that first. Then when the fan should be running check for 12 VDC to the fan motor. IF you have proper voltage to the fan and it is not running the fan is bad. IF no voltage to the fan then you could have a faulty control board or wiring. You could also check the fan for resistance, but I am not sure what ohm reading this fan should have. If you get no resistance or a reading that is way to high or low then we can assume the fan is bad. I could not find a tech sheet on this unit.