Frigidaire Refrigerator Error Code R-Sensor Error

The R-Sensor Error means the Main PCB has detected a temperature reading from the fresh food compartment sensor that is above 149°F (65°C) or below -58°F (-50°C), which are physically impossible values during normal operation. This tells the board the sensor circuit has failed rather than the compartment actually reaching those temperatures. The fault is most often a bad thermistor, damaged wiring, or a loose connector in the sensor circuit.

The error indicates a sensor circuit failure, not necessarily that the compartment has actually reached a dangerous temperature. However, because the refrigerator's control board relies on the sensor reading to manage cooling, improper temperature regulation is possible while the fault is active. Check the actual compartment temperature with a separate thermometer and move perishables to another refrigerator if the compartment is not staying at or below 40°F (4°C).

Repair costs vary depending on what component is faulty. Replacing the fresh food temperature sensor is generally a lower-cost repair, with parts typically ranging from $15 to $50 and labor adding $75 to $150 if a technician is involved. If the Main PCB is the cause, costs increase significantly, with the board alone often ranging from $100 to $300 or more depending on the model.

A knowledgeable DIYer can perform basic checks such as inspecting and reseating connectors at CN30 and CN76 and examining the wiring harness for visible damage. Measuring the voltage at CN30 pin 6 to CN76 pin 1 with a multimeter, which should read between 1.0V and 4.5V, will help confirm whether the sensor or wiring is the problem. Replacing the fresh food temperature sensor is a manageable repair for someone comfortable with appliance work, but Main PCB replacement should be handled with care.

A power reset may temporarily clear the error display, but the code will return if the underlying sensor circuit fault has not been corrected. Resetting does not fix a failed thermistor, broken wire, or faulty connector. The voltage at CN30 pin 6 to CN76 pin 1 needs to be within the 1.0V to 4.5V range consistently before the error will stay cleared.