Kenmore Refrigerator Error Code r1

The r1 code means the main control board is detecting that the refrigerator compartment temperature sensor is either open or shorted. An open condition means the circuit has no continuity, and a shorted condition means resistance has dropped to near zero. Both states prevent the board from accurately reading the compartment temperature. The first step is to check all wiring connections between the sensor and the main PCB.

Running the refrigerator with an active r1 fault is not recommended for food safety. Because the main board cannot accurately read the compartment temperature, it may not cycle the compressor correctly, leaving the interior warmer than the set point. Perishable foods should be moved to another cooled location until the fault is diagnosed and repaired.

Repair cost depends on which component is at fault. A replacement refrigerator compartment thermistor typically costs in the range of $15 to $50 for the part alone, making it one of the more affordable fixes. If the main PCB is the cause, board replacement can range from $100 to $300 or more depending on the model. Adding professional labor will increase total costs, generally ranging from $150 to $400 for the full repair depending on parts needed and local labor rates.

Start by inspecting all wiring connectors in the sensor circuit and at the main PCB, ensuring each one is fully seated and free of corrosion. If connections look good, use a multimeter to test the resistance of the refrigerator compartment thermistor and compare it to the expected value for the current temperature. A reading of infinite resistance or near zero ohms means the sensor has failed and needs to be replaced. If the sensor and wiring test correctly, the main PCB may need to be evaluated.

A power reset may temporarily clear the code, but if the underlying sensor or wiring fault still exists, the r1 code will return once the board runs its diagnostic checks again. A reset is useful for confirming whether the fault is intermittent, but it does not repair a failed thermistor, damaged wiring, or corroded connector. The root cause must be corrected to permanently clear the code.