mypros+
Error code reference

Electrolux Freezer Error Code All LEDs lit (temperature display)

Sensor defect detected

Electrolux codesElectrolux freezer codes

Sensor defect detected — the sensor reading is outside the allowed measurement range (-35°C to +40°C); compressor runs on fixed cycle (30 min on, 45 min off).

First step from the service manual

Check NTC sensor resistance values against the resistance-temperature table; if reading returns to valid range, alarm resets automatically.

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

MyPros+ Max

Get the full diagnostic procedure for All LEDs lit (temperature display).

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What All LEDs lit (temperature display) means on a Electrolux freezer

When all LEDs illuminate simultaneously on the temperature display of an Electrolux freezer, the control board has detected that the NTC (Negative Temperature Coefficient) thermistor sensor is reporting a value outside its valid measurement range of -35°C to +40°C. This range represents the boundaries within which the sensor can produce a reliable resistance reading that the control board can interpret accurately. Any reading beyond these limits is treated as a sensor fault rather than a legitimate temperature reading, and the unit responds by triggering the all-LED alarm condition.

The NTC sensor works by changing its electrical resistance in a predictable, inverse relationship with temperature. The control board cross-references the measured resistance against a resistance-temperature table to determine the actual freezer compartment temperature. If the sensor circuit is open (infinite resistance), shorted (near-zero resistance), or physically damaged, the resulting reading falls outside the -35°C to +40°C window and triggers this fault. To maintain food safety during the fault condition, the compressor switches to a fixed protective cycle: 30 minutes on followed by 45 minutes off, rather than shutting down entirely.

Common root causes include a broken or corroded sensor connector, a damaged sensor probe from ice buildup or physical contact, wiring harness failures between the sensor and control board, or in some cases a failed control board that misreads an otherwise functional sensor. Because the alarm resets automatically once the sensor returns a valid reading, intermittent faults caused by loose connectors or marginal wiring can cause the alarm to appear and disappear without a clear pattern.

Source: manufacturer service documentation.

Common causes of All LEDs lit (temperature display)

  1. 01

    Failed or damaged NTC temperature sensor

    Part replacement

    The NTC thermistor probe itself may be cracked, corroded, or broken, causing an open or shorted circuit. Resistance measured at the sensor terminals will not match the expected values in the resistance-temperature table for the current ambient conditions.

  2. 02

    Loose or corroded sensor connector

    Wiring / connection

    The electrical connector joining the sensor to the wiring harness can loosen or corrode over time, producing intermittent or completely invalid resistance readings. Inspect the connector for corrosion, bent pins, or incomplete seating.

  3. 03

    Damaged wiring harness

    Part replacement

    Wiring between the NTC sensor and the control board can be pinched, chafed, or broken, particularly in areas where ice buildup or cabinet flex can stress the wire. A continuity check along the harness will reveal any open or shorted segments.

  4. 04

    Ice bridging over the sensor probe

    Wiring / connection

    Heavy ice accumulation around the sensor probe can physically damage the probe or in some cases alter its effective reading environment. Check for excessive frost or ice contact with the sensor body during inspection.

  5. 05

    Faulty control board

    Part replacement

    If the NTC sensor and all wiring check out correctly against the resistance-temperature table, the control board itself may be misinterpreting a valid sensor signal. This is the least common cause and should be diagnosed only after ruling out the sensor and wiring.

See the test procedure for each cause

Frequently asked questions about All LEDs lit (temperature display)

What does All LEDs lit (temperature display) mean on a Electrolux freezer?
All LEDs lighting up simultaneously on the temperature display indicates the control board has detected that the NTC temperature sensor is reporting a value outside the valid range of -35°C to +40°C. This is treated as a sensor defect, meaning the board cannot trust the reading to control the compressor normally. As a protective measure, the compressor runs on a fixed cycle of 30 minutes on and 45 minutes off until the fault is resolved. The alarm will reset automatically if the sensor reading returns to a valid range.
How do I fix the all-LEDs error on my Electrolux freezer?
Start by checking the NTC sensor's resistance at its connector terminals and comparing that reading against the resistance-temperature table for the unit. Also inspect the wiring harness and connectors between the sensor and control board for corrosion, damage, or loose connections. If the sensor resistance is out of spec, replacing the sensor is typically the required fix. If the sensor measures correctly but the fault persists, the control board may need to be evaluated.
Is it safe to keep using my Electrolux freezer while all the LEDs are lit?
The freezer does continue to run in a protective fixed compressor cycle (30 minutes on, 45 minutes off) when this fault is active, which provides some cooling. However, the unit is no longer regulating temperature based on actual sensor feedback, so internal temperatures may fluctuate outside the safe range for frozen food storage. It is advisable to monitor food condition and have the sensor fault diagnosed and repaired promptly rather than relying on the fallback cycle for an extended period.
Will resetting the freezer clear the all-LEDs error code?
Simply power cycling the freezer will not permanently clear this fault if the underlying sensor problem remains. The alarm is designed to reset automatically only when the NTC sensor returns a reading within the valid -35°C to +40°C range. If the sensor, wiring, or connector is defective, the error will return immediately or shortly after a reset because the fault condition still exists.
How much does it cost to repair the sensor fault on an Electrolux freezer?
Repair costs vary depending on what component is at fault. If the fix involves only cleaning or reseating a corroded connector, costs may be limited to a service call fee in the range of $75 to $150. Replacing an NTC sensor typically adds $20 to $80 in parts cost. If a control board replacement is required, parts alone can range from $100 to $300 or more, with total repair costs including labor potentially reaching $250 to $500 depending on your location and the service provider.

Related Electrolux freezer codes

All Electrolux freezer codes
View all 17 Electrolux freezer codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass