Samsung refridgerator not cooling

SOURCE: no cooling

I would first check the defrost timer...It may be stuck in defrost position and not advancing to the cooling mode, a common problem...There is a slot, clutched cut, to keep it from being turned in the wrong direction and if you can get to it, place a screw drive in the slot and turn it slowly until you hear a click and/or the compressor start...Some timers are located in back, some in front( bottom), and others inside the refrigerator close to the thermostat...If this does the trick a new timer may be in order, but often it may not happen again...I would replace it anyway to keep from losing food...If the compressor does not start, it may be a bigger problem and usally the overload, especially after a storm with a power off on situation..Overloads burn up from to much amp draw, starting, or trying to start the compressor to soon after it stopping...The compressor pumps up on one side and pulls in on the other creating a pressue difference that must equalize on the off cycle for the compressor to start again...If the off cycle is cut short, like a power off/on situation, the load is to much for it to start until the pressures equalize on the off cycle...Hope this helps.

SOURCE: Refridgerator won't cool, freezer is OK

if it is a bottom freezer and top refrigerator it is low gas in the system need to be topped up

SOURCE: my Samsung RB1855SW refridgerator not cooling

You may just be catching the unit during normal defrost cycles. Next time, allow the unit some time to complete it's needed task. If you allow it 30-minutes, it should restart on it's own. The cycles are necessary to keep the unit working properly. The cycles will be more frequent as the weather warms. If you allow the unit 30-minutes and it does not restart on it's own, then there could be a problem. You might consult the owners manual for more details.

SOURCE: door ajar alarm ringing and refridgerator not cooling enough

This could be a defective thermistor telling the fridge that the evaporator fan is frozen up with ice. But if you are lucky like me it is a defective door switch, telling the fridge that the door is open when in fact it is closed. The fan sending cold air from the freezer section to the refrigerator section turns off when the door is open, so a defective door switch can keep that fan turned off all the time. Push the buttons on the door switch to see if the lights go off in the freezer and refrigerator. If not, use a knife or screwdriver to pry out the switch and unplug it. Then you should hear the fan turn on, and the refrigerator start cooling. Good luck! genetuck PS....my light was not coming on at all, and I had to unplug the refrigerator for five minutes, then plug it in to get the light to work. I just discovered the switch was defective, and don't know yet if there will be any future problems with the light.