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

1. undefined: Measure voltage between Main PCB CN20 2PIN and 4PIN 2. undefined: Voltage should read between 4.5V and 1.0V

Samsung Refrigerators

Error Code R

Q: What does error code R mean on a Samsung refrigerators?

Refrigerator temperature sensor failure Sensor housing separation; Contact error; Disconnection; Short circuit; Detected temperature above 65°C or below -50°C

Refrigerator temperature sensor failure

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: R

What This Means

Sensor housing separation; Contact error; Disconnection; Short circuit; Detected temperature above 65°C or below -50°C

What actually causes this:

The temperature sensor in the fridge is not reading properly, typically from a loose connector or failed sensor

First Thing to Check

Verify the connector at CN20 pins 2-4 is fully seated and not corroded

Parts Involved

Thermistor (DTN-C502)Main PCB CN20 connector

How to Fix

1
Measure voltage between Main PCB CN20 2PIN and 4PIN
2
Voltage should read between 4.5V and 1.0V

This Error Applies To

Samsung RS22T5561 Series Refrigerators

Service manual exact match: RS27T5561Service manual exact match: RS22T5561Service manual exact match: RS27T5200Service manual exact match: RS22T5201Service manual exact match: RS28T5B00Service manual exact match: RS22T5200