Error Code 25E

Manually defrost the fridge evaporator: Unplug the refrigerator. Remove all food and shelves from the fresh food compartment. Unscrew the rear panel inside the fridge section (Phillips screwdriver, typically 4-6 screws). If ice is present on the evaporator, leave the unit unplugged with the door open for 3-5 hours. Place towels to catch water.

Test the fridge defrost heater: Locate the fridge defrost heater along the bottom of the fridge evaporator coil assembly. Disconnect both wire connectors. Set a multimeter to the 200-ohm range. A working heater reads 20-40 ohms. OL means the heating element is burned out. Replace with the Samsung part number specific to your model.

Test the fridge defrost bi-metal thermostat: Locate the bi-metal disc on the fridge evaporator tubing. Disconnect its two wires. At room temperature, test for continuity -- it should read closed (continuity). OL at room temperature means the thermostat is stuck open. Replace it.

Check the fridge defrost sensor: Disconnect the defrost thermistor from its harness. Test resistance on the 20k-ohm scale. At 77 degrees F, expect approximately 5 kOhms. Replace if you get OL or 0 ohms. This sensor is often the same part type as the 5E sensor.

Replace failed parts and verify: Install the replacement heater, thermostat, or sensor. Reassemble the rear panel with all screws. Replace shelves and food. Plug in the fridge. Run a forced defrost cycle: press the Energy Saver and Fridge buttons simultaneously for 8 seconds (model-dependent), then press again to cycle to the fridge defrost mode. Confirm the heater activates and the 25E code clears.