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Error code reference

Kenmore Refrigerator Error Code R2 sensor

Abnormal Refrigerator Sensor (2)

Kenmore codesKenmore refrigerator codes

Abnormal Refrigerator Sensor (2) - cut or short circuit wire in refrigerator temperature sensor 2 (middle room).

First step from the service manual

Check for loose connection in CON7, then unplug connector and 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 R2 sensor means on a Kenmore refrigerator

The R2 sensor error code on a Kenmore refrigerator indicates an abnormal condition in Refrigerator Temperature Sensor 2, which monitors the middle compartment of the refrigerator. The control board has detected either an open circuit (cut wire) or a short circuit condition in this sensor's wiring or the sensor element itself. This sensor provides real-time temperature feedback to the main control board, allowing the system to regulate cooling cycles accurately. When the board receives a signal outside the expected resistance range, it flags the R2 fault and may alter or suspend normal cooling operations in that zone.

The diagnostic process begins at connector CON7, which carries the signal wiring for this sensor. With the refrigerator unplugged, the connector should be inspected for looseness, corrosion, or physical damage before any component is condemned. After disconnecting CON7, resistance should be measured across the Gray to Gray wires associated with the sensor. A functional NTC thermistor sensor will show a resistance value that corresponds to the ambient temperature of the compartment. A reading of zero ohms indicates a short circuit, while an open line (infinite or OL resistance) confirms a broken or cut wire.

Common causes include damaged wiring from ice buildup or door hinge wear, a failed thermistor element, or a corroded connector at CON7. In some cases, the wire harness routed through the refrigerator door or cabinet wall can develop breaks over time due to repeated flexing. The sensor itself is a relatively low-cost component, but tracing a wiring fault through the harness may require careful inspection of the full cable run from CON7 to the sensor mounting point in the middle compartment.

Source: manufacturer service documentation.

Common causes of R2 sensor

  1. 01

    Loose or corroded connection at CON7

    Wiring / connection

    The connector at CON7 can loosen over time or develop corrosion, creating an intermittent or failed signal. Inspecting and reseating the connector is the first step and may resolve the fault without replacing any parts.

  2. 02

    Failed R2 thermistor sensor

    Part replacement

    The thermistor element in the middle compartment can fail internally, producing either a short or open circuit reading when measured across the Gray to Gray wires at CON7. Replacement of the sensor is required if resistance is out of range.

  3. 03

    Cut or broken sensor wire

    Part replacement

    The wiring between CON7 and the sensor can be cut or broken due to ice formation, pinching during reassembly, or physical damage inside the cabinet. An open circuit reading during resistance testing points to this cause.

  4. 04

    Damaged wire harness from repeated flexing

    Part replacement

    Sections of the sensor wiring harness routed near door hinges or through cabinet walls can develop internal breaks over time from repeated movement and flexing. The wire insulation may look intact externally while the conductor inside is broken.

  5. 05

    Moisture or ice intrusion at the connector

    Wiring / connection

    Water or ice accumulation around the CON7 connector can cause a short circuit between terminals. Inspecting the connector area for moisture damage and allowing it to dry fully before retesting can help isolate this cause.

See the test procedure for each cause

Frequently asked questions about R2 sensor

What does R2 sensor mean on a Kenmore refrigerator?
The R2 sensor code means the refrigerator's control board has detected an abnormal condition in Refrigerator Temperature Sensor 2, the sensor that monitors the middle section of the fresh food compartment. The fault indicates either a cut wire (open circuit) or a short circuit in the sensor or its wiring. This sensor is responsible for feeding temperature data to the control board so cooling cycles can be properly managed. Without a valid signal from this sensor, the refrigerator may not regulate temperature correctly.
How do I fix the R2 sensor error on my Kenmore refrigerator?
Start by checking for a loose connection at connector CON7, as a poor connection is a common and easy fix. Unplug the refrigerator, disconnect CON7, and measure resistance between the Gray and Gray wires to test the sensor. A reading of zero ohms means a short circuit, while an open or infinite reading means a broken wire or failed sensor element. Depending on the result, you will need to repair or replace the wiring harness or the R2 thermistor sensor itself.
Is it safe to keep using my Kenmore refrigerator when the R2 sensor error is showing?
It is not recommended to rely on the refrigerator for food storage while this error is active. Because the R2 sensor monitors the middle compartment temperature, a faulty reading can cause the refrigerator to undercool or overcool that zone without any indication. Food safety can be compromised if the compartment temperature is not being accurately monitored and controlled. Address the fault as soon as possible to ensure safe food storage temperatures are maintained.
How much does it cost to fix an R2 sensor error on a Kenmore refrigerator?
If the issue is only a loose connection at CON7, there may be no parts cost at all, just the time to inspect and reseat the connector. A replacement thermistor sensor typically costs in the range of $15 to $50 depending on the specific model. If a professional technician is needed for diagnosis and wiring repair, labor costs can range from $75 to $200 or more depending on your location and the extent of the wiring damage.
Will resetting my Kenmore refrigerator clear the R2 sensor error code?
A reset may temporarily clear the error code from the display, but if the underlying fault in the sensor or wiring is still present, the code will return once the control board runs its diagnostics again. Resetting without repairing the root cause does not fix the problem and can delay proper diagnosis while the refrigerator continues to operate without reliable temperature monitoring. A proper repair at the sensor or CON7 connector is needed to permanently clear the fault.

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