Samsung side by side refrigerator RS265TDRS started making loud propeller like noise on the cooler side half way up. Notice bunch of ice around the lights on the back wall of it. I unplugged the fridge for a little while and plugged it back in. Also cleaned up the mid section so it can breathe. The noise slowly reduced and the fridge seemed to be working fine for a couple of days. This morning I get up and the temperature on the coooler side was flashing at 36'F and there was water on the floor. I though that maybe it was defrosting and I let it sit. 3 hours later I called my wife and she said that the cooler side is not cold and it is still flashing. So she unplugged it again for a few minutes and plugged it back in. The temperature was now at 61'F and it has stayed there for the last 10-12h. Very little or no cooling seems to be in effect but the freezer seems to be fine. I just ran out of warranty too. I am quite dissapointed and I like to find a solution to my problem. Can you help, please

SOURCE: loud noise from the freezer side

The problem is a buildup of ice on the plastic housing (the curved plastic bit) in the back of the freezer under the fixed shelf where the icetub goes. The fan behind this plastic housing is hitting the ice when the defrost comes on.

Unplug the fridge, unpack the freezer, remove the four screws in the back, take off the sheetmetal backing and let the fridge thaw. You can remove the plastic piece after a while and get the ice off (be careful not to remove the styrofoam insulation by going too quickly).

Reassemble and you're back in business, for a few months. I'm never buying Samsung again myself.

SOURCE: SAMSUNG RS253BAWW NOT WORKING

the ice maker wont cycle untill the temp of the ice is around 10 degrees so if the freezer is at 15 or 20 due to some other malfunction then you will see the maker full of ice but it wont harvest and make another batch. so you could have a sensor bad, control malfunction, refrigeration issue, compressor, defrost system malfunction(you mentioned ice build up)

SOURCE: I have a Samsung

move the fridge out to see if there is water underneath it sounds like a leak in a line some where you might want to have a service tech check it out.

SOURCE: fridge condensation - freezer thawing

OK now I'm wondering are theses numbers your getting 4 -9 the actual temps of the refrigerator and the freezer? and do they feel this cold and correct to you? I know the refrigerator side shouldn't be below 34 or so and definitely not below 32. If this is correct and the numbers are not settings but temps. (Now if you have a touch pad its electronic. If it has knobs it has a separate defrost and thermostat and are electro-mechanical)
If electronic Your control board and possibly defrost control are out.
It would more likely be the sensors going to the board(s) It will both sensors have the possibility of causing your problem. 1 will control the run of the compressor (and this one could and probably is connected to the inside coil) and 1 will control the air damper tween the refdg and freezer compartments, and may turn on the inside fan operation too.

(this would be my first suspect if these are degrees numbers). Look at the thermostat control see if it is attached to the indoor coil (usually the tube leavign the indoor section. If its not attached its not sensing the coil temp and when goes into defrost wala its not senmsing temps like its designed to do. Look for a broken clip or possible a plastic wire tie that holds this sensor in place.

Please get back to me with what you see - find on this look up.

SOURCE: SAMSUNG RS263OSH SIDE BY SIDE REFRIGERATOR DEFROSTED

sounds like a bad timer in the defrost cycle.  Call a tech repairman