I repaired my Samsung RS267LASH, my symptoms was the freezer was staying cold, but the fridge was not, i pulled the inner panels out, and done some resistance checks on thermistors, and the defrost sensor, and found it to be open, there was a total of 4 sensor in the fridge, and if they are check there should be some value showning when you use a multimeter, i replace the thermal switch, and all is working like it's suppose too