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Error code reference

Kenmore Refrigerator Error Code rt E

Room temperature sensor error caused by short or open circuit in the room temperature sensor.

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Room temperature sensor error caused by short or open circuit in the room temperature sensor.

First step from the service manual

Check each sensor and its connector.

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

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What rt E means on a Kenmore refrigerator

The rt E error code on a Kenmore refrigerator indicates a fault in the room temperature sensor circuit. This sensor monitors the ambient temperature of the room or environment surrounding the refrigerator, and the control board uses this data to adjust compressor and fan operation for optimal efficiency. When the board detects either a short circuit or an open circuit in the sensor's wiring loop, it triggers the rt E code and may alter normal cooling behavior.

An open circuit occurs when the sensor or its wiring has a break in continuity, preventing any signal from reaching the control board. A short circuit occurs when the sensor's resistance drops to near zero, typically caused by damaged insulation allowing wires to contact each other or a grounded surface. Both conditions produce readings outside the expected resistance range, which the control board interprets as a sensor failure.

Diagnosis begins with a visual and electrical inspection of the room temperature sensor and its connector. Check the connector for corrosion, bent pins, or loose seating. Using a multimeter, test the sensor's resistance and compare it against the expected range for the operating temperature. Inspect the wiring harness between the sensor and control board for any signs of pinching, chafing, or rodent damage. If the sensor reads as open or shorted, it will need to be replaced. If the wiring and connector test correctly, the control board itself may be at fault.

Source: manufacturer service documentation.

Common causes of rt E

  1. 01

    Faulty room temperature sensor

    Part replacement

    The sensor itself has failed internally, producing an open or shorted circuit. Testing with a multimeter will show a resistance reading outside the normal operating range for the ambient temperature.

  2. 02

    Loose or corroded sensor connector

    Wiring / connection

    The connector linking the room temperature sensor to the wiring harness may have worked loose or developed corrosion on its terminals, interrupting the circuit. Inspect the connector visually and reseat it firmly to check if the error clears.

  3. 03

    Damaged wiring harness

    Part replacement

    The wiring between the sensor and the control board may be pinched, chafed, or broken, causing an intermittent or permanent open circuit. Trace the harness carefully and look for visible damage or bare wires.

  4. 04

    Short circuit due to moisture or debris

    Wiring / connection

    Moisture intrusion or debris around the sensor or its wiring can cause a short circuit between conductors. Check the sensor area for signs of condensation buildup or any foreign material bridging the wiring.

  5. 05

    Failed control board

    Part replacement

    If the sensor and all wiring test within normal parameters but the rt E code persists, the main control board may have a defective input circuit for the room temperature sensor. Control board replacement is typically a last-resort diagnosis.

See the test procedure for each cause

Frequently asked questions about rt E

What does rt E mean on a Kenmore refrigerator?
The rt E code indicates a room temperature sensor error caused by a short circuit or open circuit in the sensor or its wiring. The control board cannot receive a valid signal from this sensor and flags the fault. Diagnosis involves checking the sensor, its connector, and the wiring harness leading to the control board.
How do I fix the rt E error on my Kenmore refrigerator?
Start by locating the room temperature sensor and inspecting its connector for looseness, corrosion, or damage. Reseat the connector and check if the error clears. If the code returns, use a multimeter to test the sensor's resistance. A sensor reading as open or shorted will need to be replaced, and damaged wiring should be repaired or replaced as well.
Is the rt E error on a Kenmore refrigerator dangerous?
The rt E error is not an immediate safety hazard, but it can affect how efficiently your refrigerator manages cooling. If the control board cannot read ambient room temperature accurately, compressor and fan cycles may not be optimized. It is best to address the fault promptly to avoid potential food spoilage or unnecessary energy consumption.
Will resetting my Kenmore refrigerator clear the rt E code?
A reset may temporarily clear the rt E code, but if the underlying sensor fault still exists, the code will return once the control board runs its diagnostic checks again. A reset is useful for ruling out a one-time communication glitch, but a persistent rt E code requires physical inspection and testing of the sensor and its wiring.
How much does it cost to repair the rt E error on a Kenmore refrigerator?
Repair costs depend on the root cause. If only the room temperature sensor needs replacement, parts typically range from around $15 to $50, with labor adding to the total if a technician is involved. A damaged wiring harness repair may fall in a similar range, while a control board replacement can cost significantly more, often between $100 and $300 or higher for parts alone.

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