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Error code reference

Electrolux Freezer Error Code E1

Thermistor error

Electrolux codesElectrolux freezer codes

Thermistor error - the freezer operates in Fail Safe Mode with compressor running continuously.

First step from the service manual

Check thermistor status via service diagnostic mode; press mute sounds key to stop audible alarm.

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

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What E1 means on a Electrolux freezer

The E1 error code on an Electrolux freezer indicates a thermistor fault. The thermistor is a temperature-sensing resistor that continuously monitors the internal cabinet temperature and relays that data to the control board. When the control board detects that the thermistor signal is outside its expected parameters, either through an open circuit, a short circuit, or a resistance value that falls outside the acceptable range, it flags the E1 code and triggers an audible alarm.

When E1 is active, the freezer enters Fail Safe Mode. In this mode, the compressor runs continuously without cycling, because the control board can no longer use thermistor feedback to regulate the cooling cycle normally. While this protects food from thawing in the short term, continuous compressor operation without temperature regulation can cause excessive frost buildup, elevated energy consumption, and potential long-term strain on the compressor and sealed system components.

Diagnosis begins by entering the service diagnostic mode and pressing the mute sounds key to silence the audible alarm. From there, technicians can confirm the thermistor fault and check whether it is caused by a failed sensor, a wiring harness problem such as a broken or corroded connector, or a defective control board that is misreading a valid thermistor signal. Resistance testing of the thermistor across its connector terminals is essential for differentiating between a sensor failure and a wiring or board issue.

Source: manufacturer service documentation.

Common causes of E1

  1. 01

    Failed thermistor sensor

    Part replacement

    The thermistor itself has failed, either open or shorted, causing it to send a signal outside the acceptable range to the control board. Resistance testing at the sensor terminals will confirm this if the reading is far outside the expected value for the current cabinet temperature.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The wiring between the thermistor and the control board may have a broken wire, a loose connector, or corrosion at the terminals. A visual inspection of the harness and connector, combined with continuity testing, will identify this issue.

  3. 03

    Corroded or loose thermistor connector

    Wiring / connection

    Moisture inside a freezer cabinet can corrode the thermistor connector pins over time, creating high resistance or intermittent loss of signal. Cleaning or replacing the connector may resolve the fault without replacing the sensor.

  4. 04

    Defective control board

    Part replacement

    If the thermistor and all wiring check out correctly, the control board itself may be misinterpreting the sensor signal or has failed internally. This is typically diagnosed by confirming the thermistor reads correctly at the board's input terminals while the E1 code persists.

  5. 05

    Thermistor displaced from its mounting location

    Wiring / connection

    If the thermistor probe has come loose from its clip or mounting bracket, it may be sensing an unintended area of the cabinet and reporting an out-of-range temperature. Inspect the sensor position and reseat it if needed.

See the test procedure for each cause

Frequently asked questions about E1

What does E1 mean on a Electrolux freezer?
E1 on an Electrolux freezer indicates a thermistor error, meaning the control board is not receiving a valid temperature signal from the internal temperature sensor. As a protective response, the freezer enters Fail Safe Mode and runs the compressor continuously to maintain freezing temperatures. An audible alarm will also sound, which can be silenced by pressing the mute sounds key. The fault requires diagnosis of the thermistor, its wiring, and potentially the control board.
Can I fix an E1 error on my Electrolux freezer myself?
Some causes of E1 are DIY-friendly, such as reseating a loose connector or inspecting visible wiring for obvious damage. However, properly diagnosing the fault requires entering the service diagnostic mode and performing resistance testing on the thermistor. If the control board or sealed system components are involved, a qualified technician should handle the repair.
Is it safe to keep using my Electrolux freezer while E1 is displayed?
In Fail Safe Mode, the compressor runs continuously, so your food should remain frozen in the short term. However, running the compressor non-stop without proper temperature regulation can lead to excessive frost buildup and added wear on the compressor over time. It is best to address the E1 fault as soon as possible rather than leaving the unit in this mode indefinitely.
How much does it cost to repair an E1 error on an Electrolux freezer?
Repair costs depend on the root cause. Thermistor replacement is generally the least expensive option, typically ranging from around $50 to $150 including parts and labor. If the control board needs replacement, costs can range from $150 to $400 or more depending on the model and labor rates in your area. A diagnostic visit from a technician will clarify exactly which component is at fault before you commit to a repair.
Will resetting my Electrolux freezer clear the E1 error code?
A power reset may temporarily clear the E1 code if the fault was caused by a momentary signal interruption, but the code will return if the underlying problem with the thermistor or wiring is still present. The mute sounds key can silence the audible alarm, but this does not resolve the fault. A proper repair of the thermistor, wiring, or control board is required for the code to clear permanently.

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