How do I fix error code R-1-2 on a Samsung refrigerators?

1. undefined: 1. Check if Main PCB Connector CN30 is inserted correctly 2. undefined: 2. Check if R Sensor unit is normal by measuring resistance at CN30 #3 to #8 — compare with temperature table 3. undefined: 3. Measure voltage between Main PCB Connector CN30-#3 (Red) and REG1 Heat Sink — should be between 0.6V and 4.6V 4. undefined: 4. Check input voltage of IC10 MICOM #53 — should match CN30-#3 voltage 5. undefined: 5. If all normal, recheck bad contact of connector

Samsung Refrigerators2009–present

Error Code R-1-2

The fridge compartment temperature sensor is not reading properly

Moderate

Address soon - your appliance may not work properly

Also displayed as: R-1-2 (LED blink pattern)

What This Means

Refrigerator sensor housing separated; Sensor connector contact error; Sensor wire disconnection; Sensor short circuit; Sensor reading above 149°F or below -58°F

What actually causes this:

The sensor wire came loose or the sensor itself failed

First Thing to Check

Try unplugging the refrigerator for 5 minutes and plugging it back in to reset

Parts Involved

R Temperature SensorMain PCB

How to Fix

1
1. Check if Main PCB Connector CN30 is inserted correctly
2
2. Check if R Sensor unit is normal by measuring resistance at CN30 #3 to #8 — compare with temperature table
3
3. Measure voltage between Main PCB Connector CN30-#3 (Red) and REG1 Heat Sink — should be between 0.6V and 4.6V
4
4. Check input voltage of IC10 MICOM #53 — should match CN30-#3 voltage
5
5. If all normal, recheck bad contact of connector

This Error Applies To

Samsung RF195AC Series Refrigerators (2009) (2009–present)

Service manual exact match: RF195ACService manual exact match: RF20HFENBService manual exact match: RF197ACService manual exact match: RF18HFENBService manual exact match: RF215ACService manual exact match: RF217AC