Error Code R-1-1
Ice maker temperature sensor is open, shorted, or disconnected
Moderate
Address soon - your appliance may not work properly
Also displayed as: R-1-1 (LED blink pattern on panel)
What This Means
Sensor housing connector disconnected or loose at CN90; Sensor wire open or shorted; Ice maker sensor unit failed; Poor solder joint on Main PCB at CN90
What actually causes this:
The connector at CN90 has come loose, or the sensor wire has broken — possibly from ice buildup or vibration over time.
First Thing to Check
Push the CN90 connector on the Main PCB firmly until it clicks fully seated.
Parts Involved
How to Fix
- 1
Check that MAIN PCB connector CN90 is fully seated
- 2
Measure resistance between CN90 #8 (Sky-blue) and CN90 #4 (White) — compare to temperature table (DATA1); 0 ohm = short, infinite = open
- 3
Measure voltage at CN90 #4 (White) vs REG1 HEAT SINK ground — should be 0.6V to 4.6V
- 4
Verify IC01 MICOM pin #78 input voltage is within 0.6V–4.6V range
- 5
Check SENSOR MARKING #9 (R901) on PCB for cold solder or bridging
- 6
Replace ice maker if sensor integral to unit fails
This Error Applies To
Samsung RF267AERS Series Refrigerators (2009) (2009–present)
Related Error Codes
Ice maker failed to produce ice after three complete harvest cycles
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