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Error code reference

Kenmore Refrigerator Error Code RT-Sensor

Abnormal Room Temperature Sensor

Kenmore codesKenmore refrigerator codes

Abnormal Room Temperature Sensor - secondary error, cut or short circuit wire on room temperature sensor.

First step from the service manual

Check for a loose connection in CON5.

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

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What RT-Sensor means on a Kenmore refrigerator

The RT-Sensor error code on a Kenmore refrigerator indicates an abnormal condition detected in the room temperature sensor circuit. This sensor monitors the ambient temperature surrounding the refrigerator, providing data the control board uses to adjust compressor and fan operation. When the board detects a reading outside of expected parameters, typically caused by a disrupted or shorted signal, it flags this code as a secondary error, meaning it often appears alongside or after another underlying fault condition has developed.

The most direct causes of this error are a cut wire or a short circuit in the room temperature sensor wiring. A cut wire produces an open circuit, resulting in no signal reaching the control board. A short circuit, by contrast, causes an abnormal voltage or resistance reading that the board interprets as sensor failure. Both conditions prevent the control board from receiving accurate ambient temperature data, which can affect the refrigerator's ability to properly regulate its cooling cycles.

The first diagnostic step is to inspect the wiring harness connection at CON5, the connector associated with the room temperature sensor circuit. A loose or corroded connection at CON5 can mimic the symptoms of a cut or shorted wire. If CON5 is secure and undamaged, the next step is to trace the sensor wiring for visible damage and then test the sensor itself for correct resistance values, followed by testing the wiring continuity between the sensor and the control board.

Source: manufacturer service documentation.

Common causes of RT-Sensor

  1. 01

    Loose connection at CON5

    Wiring / connection

    A loose or partially disconnected wiring harness at the CON5 connector is the most common cause. Inspect and reseat the connector firmly to rule this out before any further diagnosis.

  2. 02

    Cut or broken sensor wire

    Part replacement

    Physical damage to the room temperature sensor wiring, such as a cut or pinched wire, creates an open circuit. Trace the full length of the wiring harness from the sensor to the control board and look for visible breaks or abrasion points.

  3. 03

    Short circuit in sensor wiring

    Part replacement

    A short circuit occurs when the sensor wire contacts a grounded surface or another wire, producing an abnormal resistance or voltage reading at the control board. Test the wiring with a multimeter to check for unintended continuity to ground.

  4. 04

    Faulty room temperature sensor

    Part replacement

    The sensor itself may have failed internally, producing a reading outside the expected resistance range. If the wiring and connectors check out, test the sensor's resistance and compare it against the specified value for the operating temperature.

  5. 05

    Corroded or damaged connector pins at CON5

    Wiring / connection

    Even if the connector is seated, corroded or bent pins inside CON5 can interrupt the signal. Visually inspect the pins and clean any oxidation with an appropriate electrical contact cleaner.

See the test procedure for each cause

Frequently asked questions about RT-Sensor

What does RT-Sensor mean on a Kenmore refrigerator?
The RT-Sensor code means the control board has detected an abnormal signal from the room temperature sensor circuit. This is classified as a secondary error and is typically caused by a cut wire, short circuit, or loose connection in the sensor wiring. The first place to check is the CON5 connector, which links the room temperature sensor to the control board. Addressing the underlying wiring or sensor fault is necessary to clear the code.
Can I fix the RT-Sensor error myself?
Some causes are DIY-friendly, particularly checking and reseating the CON5 connector, which requires no special tools. If the connector is fine, diagnosing a cut or shorted wire requires a multimeter and the ability to trace the wiring harness. Replacing the room temperature sensor or wiring harness is a moderate repair that many experienced DIYers can complete, but if you are uncomfortable working with appliance wiring, a qualified technician should handle the repair.
Is my refrigerator safe to use while the RT-Sensor error is active?
The RT-Sensor code is a secondary error related to ambient temperature monitoring rather than a direct failure of the main cooling system. Your refrigerator may continue cooling in the short term, but without accurate room temperature data, the control board cannot optimize compressor and fan operation. It is best to address the fault promptly to avoid potential food safety issues caused by reduced efficiency or incorrect cooling behavior.
How much does it cost to repair the RT-Sensor error on a Kenmore refrigerator?
If the fix is simply reseating the CON5 connector, there may be no parts cost at all. Replacing the room temperature sensor typically costs between $15 and $50 for the part. If a wiring harness section needs replacement, parts can range from $20 to $80. Adding professional labor, total repair costs generally fall between $75 and $200 depending on the extent of the damage and your location.
Will resetting the refrigerator clear the RT-Sensor error code?
A power reset may temporarily clear the RT-Sensor code from the display, but the error will return if the underlying cause, such as a loose connector, cut wire, or faulty sensor, has not been repaired. Resetting without fixing the root problem can mask the fault and allow it to continue affecting refrigerator performance. A proper diagnosis and repair of the CON5 connection or sensor wiring is required for a lasting resolution.

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