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Error code reference

Kenmore Refrigerator Error Code Refrigerator Sensor (1)

Abnormal refrigerator sensor 1

Kenmore codesKenmore refrigerator codes

Abnormal refrigerator sensor 1 - cut or short circuit wire detected on the primary refrigerator temperature sensor.

First step from the service manual

Check for a loose connection in CON7 on Main PCB.

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

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What Refrigerator Sensor (1) means on a Kenmore refrigerator

The Refrigerator Sensor (1) error code on a Kenmore refrigerator indicates an abnormal condition detected on the primary refrigerator compartment temperature sensor. The control system has identified either an open circuit (cut or broken wire) or a short circuit condition in the sensor circuit. This sensor is a thermistor that continuously reports compartment temperature to the main PCB, allowing the board to regulate compressor and fan operation. When the board reads a resistance value outside the expected range for a thermistor in normal operation, it flags this fault.

The primary refrigerator temperature sensor connects to the main PCB through connector CON7. A loose, corroded, or damaged connection at this plug is the most common trigger for this code. Beyond the connector itself, a break or pinch in the wiring harness between the sensor and the board can create an open circuit, while a harness chafing against a metal edge can cause a short. The sensor itself can also fail internally, producing a resistance reading that falls outside the acceptable operating range for the circuit.

Because the main PCB relies on accurate input from this sensor to maintain safe food storage temperatures, an active fault may cause erratic cooling, continuous compressor operation, or complete shutdown of cooling functions. Diagnosing this code requires checking the CON7 connector for secure seating and pin condition first, then inspecting the wiring harness for visible damage, and finally testing the thermistor resistance directly if the wiring checks out.

Source: manufacturer service documentation.

Common causes of Refrigerator Sensor (1)

  1. 01

    Loose or disconnected CON7 connector on main PCB

    Wiring / connection

    The sensor wiring harness connects to the main PCB at connector CON7, and a loose or partially unseated plug at this point is the first item to check. Reseating the connector firmly may clear the fault immediately.

  2. 02

    Damaged or broken sensor wiring harness

    Part replacement

    A cut, pinched, or frayed wire between the thermistor and the main PCB creates an open circuit that the board reads as an abnormal sensor condition. Inspect the full length of the harness for visible damage, especially where it passes through panel edges or door hinges.

  3. 03

    Shorted wiring harness

    Part replacement

    If the sensor wiring insulation is worn through and two conductors contact each other or a grounded metal surface, the board detects a short circuit and triggers this code. Look for chafing marks or melted insulation along the harness route.

  4. 04

    Failed refrigerator thermistor

    Part replacement

    The primary temperature sensor thermistor can fail internally, producing a resistance reading that falls outside the expected range even when wiring and connections are intact. Testing the thermistor resistance directly with a multimeter will confirm or rule out sensor failure.

  5. 05

    Corroded or damaged connector pins at CON7

    Wiring / connection

    Moisture intrusion or age-related corrosion on the pins at CON7 can increase resistance enough to simulate an open circuit condition. Inspect the connector pins for green corrosion, bent contacts, or moisture residue.

See the test procedure for each cause

Frequently asked questions about Refrigerator Sensor (1)

What does Refrigerator Sensor (1) mean on a Kenmore refrigerator?
This code means the main control board has detected an abnormal signal from the primary refrigerator compartment temperature sensor. The board has identified either an open circuit (cut or broken wire) or a short circuit in the sensor circuit connected at CON7 on the main PCB. Without a valid temperature reading, the refrigerator cannot properly regulate cooling. The issue may originate at the connector, the wiring harness, or the sensor itself.
How do I fix the Refrigerator Sensor (1) error on my Kenmore refrigerator?
Start by locating connector CON7 on the main PCB and checking that it is firmly seated with no bent or corroded pins. If the connection looks good, trace the sensor wiring harness for any cuts, pinches, or chafed insulation. If the wiring is intact, test the thermistor resistance with a multimeter to determine whether the sensor itself has failed and needs replacement.
Is it safe to keep using my Kenmore refrigerator while this error is active?
It is not advisable to rely on the refrigerator for food storage while this error is active. Because the main board cannot accurately read compartment temperature, it may not cool sufficiently to keep food safe. Perishable items should be moved to another refrigerator until the fault is diagnosed and corrected.
How much does it cost to repair a Refrigerator Sensor (1) fault on a Kenmore refrigerator?
Repair costs vary depending on the root cause. If the fix is simply reseating a loose connector, there may be no parts cost at all. Replacing a thermistor sensor typically costs in the range of $15 to $50 for the part, while replacing a wiring harness can range from $30 to $100 or more depending on the harness assembly. Adding professional labor will increase the total, generally ranging from $100 to $250 for the complete repair visit.
Will resetting my Kenmore refrigerator clear the Refrigerator Sensor (1) error?
A power reset may temporarily clear the error code from the display, but it will return as soon as the control board performs its next sensor check and detects the same abnormal condition. The underlying fault in the sensor circuit, whether a loose connector, damaged wiring, or failed thermistor, must be physically corrected before the code will clear permanently.

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