Fan making noise but stops when door opens

Try defrosting, it might be touching ice build up. you can check by pressing the knob switch in front after defrosting one day

It sounds like the you have the problem of the fan blades hitting ice build-up. You can unplug your fridge for 2-days with the doors open to give it time to completely melt any ice build-up. Also, Samsung now offers a larger aluminum heat sink (drain probe) for about $10 that can help prevent freezing of the drain hole on the fridge side. This will help keep your cooling coils and fins from freezing-up. Remove the shelves and drawers to access the inside back cover of the fridge side. Remove the screws holding the back panel and the new larger drain clip will replace the old smaller drain clip located at the bottom behind the back wall. The part is: Samsung Part# DA61-06796A Evaporator Drain Clip