Samsung Refrigerator Error Code R-Sensor Error

The R-Sensor Error means the refrigerator compartment temperature sensor has a circuit fault. The main PCB monitors the voltage signal from this sensor between pins 9 and 11 of connector CN20, and expects a reading between 1.0V and 4.5V. When the signal falls outside that range, the board flags this error. The cause can be a failed sensor, a disconnected wire, or a short circuit in the sensor circuit.

Continuing to use the refrigerator with an active R-Sensor Error carries some risk because the control board may not regulate the compartment temperature correctly. Food safety can be compromised if the unit is over-cooling or not cooling enough. It is best to address the fault promptly and monitor compartment temperatures closely in the meantime.

A power reset may temporarily clear the error code from the display, but the code will return if the underlying sensor circuit problem has not been corrected. Resetting without repairing the fault does not restore proper temperature monitoring. The error should be properly diagnosed and resolved by addressing the sensor, wiring, or connector issue before the unit is returned to normal operation.

A knowledgeable DIYer can address some causes of this error without professional help. Reseating the connector at CN20 and securing a sensor that has fallen from its mount are straightforward tasks. Replacing the thermistor sensor itself is also a manageable repair if you are comfortable working with basic wiring. However, if the main PCB is determined to be faulty, replacement of that component is more involved and may warrant professional service.

If only the thermistor sensor needs replacement, the repair is generally affordable, with parts typically ranging from $15 to $60 and professional labor adding $75 to $150 depending on your area. If the main PCB is at fault, costs rise significantly, with PCB parts ranging from $100 to $300 or more. Getting a diagnosis before committing to parts helps avoid unnecessary expense.