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Error code reference

Kenmore Refrigerator Error Code Er 1F

Failure of freezer sensor due to cut or short circuit wire.

Kenmore codesKenmore refrigerator codes

Failure of freezer sensor due to cut or short circuit wire.

First step from the service manual

Inspect connecting wires on each sensor.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What Er 1F means on a Kenmore refrigerator

The Er 1F error code on a Kenmore refrigerator indicates a failure in the freezer temperature sensor circuit. This sensor, also called a thermistor, monitors the freezer compartment temperature and sends resistance-based readings to the main control board. When the control board detects a signal that falls outside the expected range, either an open circuit (cut wire) or a short circuit (wires touching or grounded), it logs the Er 1F fault and may disable normal temperature regulation for the freezer section.

The freezer thermistor operates by changing its electrical resistance in response to temperature. Under normal conditions, the control board reads a predictable resistance value corresponding to the current freezer temperature. A cut or broken wire causes infinite resistance (open circuit), while a shorted wire causes near-zero resistance. Either condition produces a reading the board cannot interpret as a valid temperature, triggering the fault code.

The most direct diagnostic starting point is a physical inspection of the wiring harness connected to the freezer sensor. Wires can be pinched by drawer components, chafed against metal edges, or damaged by ice buildup over time. If the wiring checks out visually and with a continuity test, the sensor itself should be tested with a multimeter to verify its resistance output matches expected values for the current freezer temperature. A faulty sensor or damaged connector can produce the same fault as a broken wire.

Source: manufacturer service documentation.

Common causes of Er 1F

  1. 01

    Damaged or broken sensor wire

    Part replacement

    A wire in the freezer sensor harness can become cut or broken due to physical stress, pinching from drawers, or ice accumulation. Inspect the full length of the wiring harness for any visible breaks, fraying, or pinch points.

  2. 02

    Shorted sensor wiring

    Part replacement

    Two wires in the harness can contact each other or touch a grounded metal surface, creating a short circuit. Look for areas where insulation has worn away and bare wire is exposed.

  3. 03

    Failed freezer thermistor

    Part replacement

    The sensor itself can fail internally, producing a resistance value outside the normal operating range even when wiring is intact. Testing the sensor with a multimeter will reveal whether it responds correctly to temperature changes.

  4. 04

    Loose or corroded connector

    Wiring / connection

    The connector joining the sensor harness to the main wiring loom can loosen over time or develop corrosion that interrupts the circuit. Check the connector for proper seating and inspect the terminals for oxidation or moisture damage.

  5. 05

    Main control board fault

    Part replacement

    In less common cases, the control board itself may misread the sensor signal due to a board-level failure. This should be considered only after wiring and the sensor have been confirmed good.

See the test procedure for each cause

Frequently asked questions about Er 1F

What does Er 1F mean on a Kenmore refrigerator?
Er 1F indicates that the freezer temperature sensor has failed due to a cut or short circuit in its wiring. The control board cannot receive a valid temperature reading from the sensor, which disrupts normal freezer operation. The fault points specifically to the sensor circuit, including the thermistor itself, the wiring harness, and the connectors between them.
Can I fix the Er 1F error myself?
A knowledgeable DIYer can often resolve this error by inspecting and reseating the sensor wiring harness connectors or replacing a visibly damaged wire. If the thermistor itself has failed, replacing it is a straightforward repair that requires basic tools and a compatible replacement sensor. However, if the fault traces back to the main control board, professional diagnosis is recommended.
Will resetting the refrigerator clear the Er 1F code?
A power reset may temporarily clear the display, but the code will return if the underlying sensor or wiring fault is still present. The control board will re-detect the out-of-range signal on the next monitoring cycle and reactivate the fault. A permanent fix requires repairing or replacing the faulty component.
Is it safe to keep using my refrigerator while Er 1F is active?
Operating the refrigerator with an active Er 1F code carries risk, as the control board may not be able to regulate freezer temperature accurately without a working sensor. Food in the freezer could be at risk if temperatures rise to unsafe levels. It is advisable to check freezer temperatures manually with a thermometer and address the fault promptly.
How much does it cost to repair the Er 1F error on a Kenmore refrigerator?
If only the wiring harness needs repair or a connector needs reseating, costs can be minimal, covering only your time and possibly a small amount of wire or connector materials. Replacing the freezer thermistor typically costs between $15 and $60 for the part, plus labor if you hire a technician. A service call with professional diagnosis and repair generally ranges from $100 to $300 depending on the specific repair needed.

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