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Error code reference

Kenmore Refrigerator Error Code rS2

Refrigerator sensor 2 (lower part in refrigerator compartment) short or open circuit

Kenmore codesKenmore refrigerator codes

Refrigerator sensor 2 (lower part in refrigerator compartment) short or open circuit. Secondary error, only visible via Display LED Check mode.

First step from the service manual

Check for a loose connection in CON9, then measure resistance between Gray to Gray wires.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What rS2 means on a Kenmore refrigerator

The rS2 error code on a Kenmore refrigerator indicates a fault with Refrigerator Sensor 2, which is the temperature sensor located in the lower portion of the refrigerator compartment. This sensor is a thermistor, a resistive component whose electrical resistance changes predictably with temperature. The control board monitors the resistance across this sensor continuously. When the board detects either a short circuit (resistance reading far too low) or an open circuit (resistance reading infinitely high or absent), it flags the rS2 code. Because this is classified as a secondary error, it does not display on the main user interface under normal operation. Technicians must enter the Display LED Check mode to view it.

The sensor connects to the main control board through connector CON9, using Gray to Gray wires. The first diagnostic step is to inspect CON9 for any looseness, corrosion, or bent pins, since a poor connection at this harness is a frequent cause of both open and short circuit readings. After confirming the connector is secure and intact, the next step is to measure resistance across the Gray to Gray wires at CON9 using a multimeter. An open circuit will show no continuity or an extremely high resistance reading, while a short circuit will show near-zero resistance. Either reading outside the expected thermistor range at the compartment temperature confirms sensor failure or a wiring fault between the sensor and the board.

Source: manufacturer service documentation.

Common causes of rS2

  1. 01

    Loose or corroded connector at CON9

    Wiring / connection

    A poor connection at the CON9 harness connector can mimic both open and short circuit conditions. Inspect the connector for looseness, corroded terminals, or bent pins before testing the sensor itself.

  2. 02

    Failed refrigerator thermistor (Sensor 2)

    Part replacement

    The lower compartment thermistor itself can fail, resulting in a true open or short circuit reading across the Gray to Gray wires. This is confirmed by measuring resistance at CON9 and finding a value outside the expected thermistor range.

  3. 03

    Damaged wiring harness between sensor and CON9

    Part replacement

    The wire leads running from the sensor to the control board connector can develop breaks or shorts due to pinching, moisture exposure, or repeated freezing and thawing cycles. Visually inspect the full length of the Gray wires for damage.

  4. 04

    Moisture or ice buildup around the sensor

    Wiring / connection

    Excessive ice accumulation in the lower refrigerator compartment can encapsulate the sensor or its wiring, potentially causing intermittent or permanent electrical faults. Check for frost buildup around the sensor mounting location.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor and all wiring check out within normal resistance values, the control board itself may be misreading the signal due to a failed input circuit. This is the least common cause and should be diagnosed only after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about rS2

What does rS2 mean on a Kenmore refrigerator?
The rS2 code indicates that Refrigerator Sensor 2, the temperature sensor in the lower part of the fresh food compartment, has been detected as having a short or open circuit. It is a secondary diagnostic code, meaning it only appears when the refrigerator is placed into Display LED Check mode rather than showing on the standard display. The control board monitors the resistance of this thermistor and flags the code when the reading falls outside expected limits.
Can I fix the rS2 error code myself?
A knowledgeable DIYer can start by checking the CON9 connector for looseness or corrosion and reseating it, which sometimes resolves the fault without any parts. Measuring resistance across the Gray to Gray wires at CON9 with a multimeter will confirm whether the sensor or wiring is at fault. Replacing a thermistor is a straightforward repair for those comfortable with basic appliance disassembly, though tracing and repairing wiring damage is more involved.
Is it safe to keep using my refrigerator with an rS2 error?
A faulty lower compartment sensor means the control board may not accurately monitor temperatures in that zone, which could lead to inconsistent cooling. Food safety could be compromised if temperatures drift outside safe ranges without the board detecting it. It is advisable to verify your refrigerator is holding proper temperatures with a standalone thermometer and to address the fault promptly.
How much does it cost to repair an rS2 error on a Kenmore refrigerator?
If the fix is simply reseating the CON9 connector, there is no parts cost involved. Replacing the lower compartment thermistor typically involves parts costs in the range of $15 to $60 depending on the specific model. If professional labor is needed, total repair costs including diagnosis and parts can range from $100 to $250 or more depending on your location and the technician's rates.
Will resetting the refrigerator clear the rS2 error code?
A power reset may temporarily clear the code from the diagnostic log, but if the underlying fault with the sensor or wiring still exists, the code will return. Because rS2 is a secondary error only visible in Display LED Check mode, you would need to re-enter that mode to confirm whether it has cleared. Addressing the root cause, whether a loose connector, failed thermistor, or damaged wiring, is the only reliable way to permanently resolve the fault.

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