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Error code reference

Electrolux Dryer Error Code Thermistor error

Thermistor fault detected; thermistor may be open circuit, short-circuited, or disconnected from the control…

Electrolux codesElectrolux dryer codes

Thermistor fault detected; thermistor may be open circuit, short-circuited, or disconnected from the control unit.

First step from the service manual

Change the thermistor.

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 Thermistor error means on a Electrolux dryer

The thermistor error on an Electrolux dryer indicates that the control unit has detected a fault in the thermistor circuit. The thermistor is a temperature-sensing resistor that monitors the air temperature inside the dryer drum and exhaust pathway. The control board relies on continuous resistance readings from this component to regulate heating cycles and prevent overheating. When the control unit detects a reading that falls outside the expected resistance range, whether due to an open circuit, a short circuit, or a lost electrical connection, it triggers this error and typically halts normal dryer operation.

The three root causes specified in this fault are distinct in nature. An open circuit thermistor produces a resistance reading of infinity, meaning the sensor has failed internally and no signal reaches the control board. A short-circuited thermistor sends a near-zero resistance reading, which the board interprets as an impossibly high temperature. A disconnected thermistor produces the same result as an open circuit because the signal path is broken at the harness or connector rather than inside the component itself. Each condition disrupts the dryer's ability to accurately track drum or exhaust temperature.

Because the first recommended diagnostic step is direct replacement of the thermistor, this component is the most likely point of failure. However, technicians should also inspect the wiring harness and connectors between the thermistor and the control board. A loose pin, corroded terminal, or damaged wire can mimic a failed thermistor and result in the same error code without any fault in the sensor itself.

Source: manufacturer service documentation.

Common causes of Thermistor error

  1. 01

    Failed thermistor (open circuit)

    Part replacement

    The thermistor has burned out or broken internally, causing its resistance to read as infinite. This is the most common cause and replacement of the thermistor is the primary recommended repair.

  2. 02

    Disconnected thermistor wiring harness

    Wiring / connection

    The connector attaching the thermistor to the wiring harness has come loose or unplugged, breaking the signal path to the control board. Inspect the connector at the thermistor and trace the harness back toward the control unit for any detached plugs.

  3. 03

    Short-circuited thermistor

    Part replacement

    Internal failure has caused the thermistor to short, sending a near-zero resistance reading that the control board interprets as an extreme temperature condition. Replacing the thermistor resolves this fault.

  4. 04

    Corroded or damaged wiring connector

    Wiring / connection

    Moisture or heat exposure can corrode the terminals in the thermistor connector, creating high resistance or an intermittent open circuit that mimics a failed sensor. Inspect connector pins closely for discoloration, corrosion, or bent contacts.

  5. 05

    Damaged wiring between thermistor and control board

    Wiring / connection

    A pinched, chafed, or broken wire in the harness between the thermistor and control board can interrupt the signal entirely. Continuity testing along the harness length will identify a break if the thermistor itself tests within normal resistance specifications.

See the test procedure for each cause

Frequently asked questions about Thermistor error

What does Thermistor error mean on a Electrolux dryer?
This error means the dryer's control board has detected a fault in the thermistor circuit. The thermistor is the component that monitors temperature inside the dryer, and the board has found that it is either open circuit, short-circuited, or disconnected. The dryer cannot safely regulate heat without a working thermistor, so it stops normal operation until the fault is corrected.
Can I fix the Thermistor error on my Electrolux dryer myself?
Yes, this repair is within reach for a knowledgeable DIYer. The primary fix is replacing the thermistor, which typically involves unplugging the dryer, accessing the sensor inside the cabinet, disconnecting the wiring harness, and installing the new part. Before replacing the sensor, it is also worth checking the wiring connector for loose or corroded terminals, as a connection issue can produce the same error without the sensor itself being faulty.
Is it safe to run my Electrolux dryer while the Thermistor error is active?
Running the dryer with an active thermistor fault is not recommended. The thermistor provides the temperature data the control board uses to regulate the heating element. Without accurate temperature readings, the dryer could overheat, potentially damaging clothing or creating a fire hazard. The dryer should remain out of service until the fault is diagnosed and repaired.
How much does it cost to fix the Thermistor error on an Electrolux dryer?
If only the thermistor needs replacement, parts typically range from $15 to $50 depending on the specific model. If a professional technician performs the repair, expect total costs including labor to fall somewhere between $80 and $200. Costs increase if a wiring harness or control board is also involved.
Will resetting my Electrolux dryer clear the Thermistor error?
A reset may temporarily clear the error code from the display, but the fault will return as soon as the control board re-checks the thermistor circuit and detects the same problem. Because the error points to a hardware fault, either in the sensor itself or its wiring, the underlying issue must be repaired before the error will clear permanently.

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