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Error code reference

Electrolux Dryer Error Code Thermistor fault

Open or short circuit in the thermistor; the thermistor may have become disconnected or have an internal…

Electrolux codesElectrolux dryer codes

Open or short circuit in the thermistor; the thermistor may have become disconnected or have an internal fault.

First step from the service manual

Ring for service. Check thermistor resistance: a serviceable thermistor has 40-60 kΩ at 20-30°C.

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
  • Verified part numbers when replacement is required
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What Thermistor fault means on a Electrolux dryer

The thermistor fault on an Electrolux dryer indicates that the control board has detected either an open circuit or a short circuit in the thermistor circuit. The thermistor is a temperature-sensitive resistor that continuously monitors drum or exhaust air temperature during the drying cycle. The control board uses this resistance signal to regulate heat output and protect the appliance from overheating. When the resistance reading falls outside the expected range, indicating a broken connection or an internal component failure, the board triggers this fault and halts normal operation.

A serviceable thermistor produces a resistance reading of 40 to 60 kΩ at an ambient temperature of 20 to 30°C. An open circuit, meaning infinite or unmeasurably high resistance, typically points to a broken internal element or a severed wiring connection. A short circuit, meaning near-zero resistance, suggests an internal breakdown of the thermistor element itself or a wiring fault causing two conductors to contact each other. Both conditions prevent the control board from receiving valid temperature data.

Common causes include physical disconnection of the thermistor plug from the wiring harness, corrosion on the connector terminals, a failed thermistor element due to heat or age, or damage to the wiring between the thermistor and the control board. Because incorrect temperature sensing can lead to overheating or failure to heat, the dryer will not operate normally until the fault is resolved and the thermistor circuit is restored to its correct resistance range.

Source: manufacturer service documentation.

Common causes of Thermistor fault

  1. 01

    Disconnected thermistor wiring plug

    Wiring / connection

    The connector linking the thermistor to the wiring harness can work loose due to vibration over time. Visually inspect the thermistor plug and reseat it firmly to confirm this is the cause.

  2. 02

    Failed thermistor element

    Part replacement

    The thermistor can fail internally due to heat stress or age, producing an open or short circuit reading outside the 40 to 60 kΩ range at 20 to 30°C. Testing with a multimeter across the thermistor terminals will confirm whether the component needs replacement.

  3. 03

    Corroded or damaged connector terminals

    Wiring / connection

    Moisture or heat can cause corrosion on the thermistor connector pins, increasing resistance or breaking the circuit entirely. Inspect the connector terminals for oxidation, burning, or physical damage.

  4. 04

    Damaged wiring harness between thermistor and control board

    Part replacement

    Chafing, pinching, or heat damage to the wiring running from the thermistor to the control board can cause an open or short circuit. Trace the harness along its full length and look for visible wire damage or bare conductors.

  5. 05

    Faulty control board

    Part replacement

    If the thermistor and all associated wiring test within specification and connections are secure, the control board itself may be misreading the thermistor signal due to an internal fault. This is the least common cause and should only be suspected after all other checks are completed.

See the test procedure for each cause

Frequently asked questions about Thermistor fault

What does Thermistor fault mean on a Electrolux dryer?
A thermistor fault means the dryer's control board has detected an open or short circuit in the thermistor, which is the sensor that monitors drying temperature. The fault can be caused by a disconnected plug, damaged wiring, or a failed thermistor. The dryer will not operate normally while this fault is active. A functioning thermistor should measure 40 to 60 kΩ resistance at room temperature (20 to 30°C).
Can I fix a thermistor fault on my Electrolux dryer myself?
A knowledgeable DIYer can start by checking whether the thermistor plug has come loose and reseating it securely. Testing the thermistor resistance with a multimeter and comparing the reading to the 40 to 60 kΩ specification at 20 to 30°C will confirm whether the sensor has failed. If wiring or the thermistor element is at fault, replacing the component is a manageable repair for someone comfortable working inside appliances. If you are unsure, contacting a qualified service technician is the recommended approach.
Is it safe to use my Electrolux dryer when a thermistor fault is showing?
You should not continue using the dryer while the thermistor fault is active. The thermistor is a critical safety component that allows the control board to monitor and regulate heat. Without valid temperature data, the dryer cannot protect itself from overheating, which could damage the appliance or create a fire risk. Resolve the fault before resuming normal use.
Will resetting my Electrolux dryer clear the thermistor fault?
A power reset may temporarily clear the fault code, but it will return if the underlying problem with the thermistor circuit has not been repaired. The control board will detect the open or short circuit again as soon as the dryer attempts to operate. A lasting fix requires diagnosing and correcting the root cause, whether that is a loose connection, damaged wiring, or a failed thermistor.
How much does it cost to repair a thermistor fault on an Electrolux dryer?
If only the thermistor itself needs replacing, parts typically cost in the range of $15 to $60 depending on the model, making it one of the more affordable dryer repairs. If a service technician carries out the diagnosis and replacement, total costs including labor are generally in the range of $100 to $250. Wiring harness repairs or control board replacement would increase costs beyond these figures. Getting a quote from a qualified technician before proceeding is advisable if you are not comfortable with self-repair.

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