Samsung refrigerators should be defrosted once every year or more if you usually have ice build-up in your refrigerator. The fan blade must be hitting some ice making the noise. Solve the ice build up and fan noise by turning ice maker off. More like fan noise. We have a Samsung RF266 refrigerator that has started on make funny noises. It has something called to twin cooling technology similar this image. The noise stops when the doors are open because the fan automatically turns off when the fridge doors are open. Over time, mineral deposits can accumulate inside the valve and restrict the water flow. To access the defrost drain on your particular refrigerator, unplug the refrigerator and check the refrigerator manual or go to YouTube and find your model refrigerator and ice at bottom . The water inlet valve is an electrically-controlled valve that opens to supply water to the refrigerator dispenser and icemaker. Remove all the ice and run fridge for a day then turn ice maker back on for a day then turn ice maker off only turn it on when you need ice. There is evidence of ice buildup inside the refrigerator particularity around vent holes indicated by the red marking in the picture. Fixing Samsung Fridge Ice Buildup If ice is building up at the bottom of the refrigerator/freezer, this is most likely due to a blocked defrost drain. If this doesn't seem like that's the case with your fridge, check the page on Normal Operating Sounds of Samsung Fridges for information around other noises and sounds your fridge might make. Best run fridge with ice maker off. I'm checking a friends Samsung refrigerator for fan noise in the refrigerator compartment and found a very large clump of ice on the refrigeration tubes coming down into the evaporator. The clump of ice is also next to the fan motor and blade which is above the evaporator. Delete If the refrigerator is noisy or loud, particularly when the ice maker is filling, the water inlet valve might be at fault. This should solve your problem with ice build in fridge and end the fan noise problem .